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Thompson, Marc T. (Marc Thomas) 1963. "High power laser diode driver with plural feedback loops." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12921.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.Includes bibliographical references (leaves 64-65).
by Marc T. Thompson.
M.S.
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Bradunas, John Joseph. "Design of a stabilized, dc-powered analog laser diode driver." Thesis, Monterey, California: Naval Postgraduate School, 1990. http://hdl.handle.net/10945/34877.
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Approved for public release; distribution unlimited.This thesis presents the design, implementation and evaluation of a depowered, stabilized-output laser diode drive unit for use in an analog fiber- optic communication transmitter. The driver circuits provide for a stable temperature-controlled operating environment by monitoring the thermistor in the laser diode module and by controlling the current to the module's integral thermoelectric cooler. Output optical power is maintained at desired bias and peak-to-peak levels by processing the signal from the monitor photodiode and amplifying (if necessary) the ac and dc drive units. These efforts offset the degradation of the laser diode's capabilities due to heat and age.
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Bradunas, John J. "Design of a stabilized, dc-powered analog laser diode driver." Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA238596.
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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, September 1990.Thesis Advisor(s): Powers, John P. Second Reader: Michael, Sherif. "September 1990." Description based on title screen viewed on December 17, 2009. DTIC Descriptor(s): Semiconductor lasers, amplifiers, output, optical properties, environments, degradation, monitoring, communication equipment, modular construction, alternating current, optical communications, lasers, thermistors, drives, transmitters, power, circuits, direct current, photodiodes, analog systems, diodes, fiber optics. DTIC Identifier(s): Semiconductor lasers, intensity modulation, theses. Author(s) subject terms: Semiconductor laser diode; thermoelectric cooling; laser diode driver; intensity modulation. Includes bibliographical references (p. 103-105). Also available in print.
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Altinok, Yahya Kemal. "Simulation And Performance Evaluation Of A Fast And High Power Pulsed Laser Diode Driver For Laser Range Finder." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614346/index.pdf.
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Laser Diodes (LDs) are semiconductor coherent lightening devices which are widely used in many fields such as defence, industry, medical and optical communications. They have advantageous characteristics such as having higher electrical-to-optical and optical-to-optical conversion efficiencies from pump source to useful output power when compared to flash lamps, which makes them the best devices to be used in range finding applications.
Optical output power of lasers depends on current through LDs. Therefore, there is a relationship between operating life and work performance of LDs and performance of drive power supply. Even, weak drive current, small fluctuations of drive current can result in much greater fluctuations of optical output power and device parameters which will reduce reliability of LDs.
In this thesis, a hardware for a fast and high power pulsed LD driver is designed for laser range finder and is based on linear current source topology. The driver is capable of providing pulses up to 120A with 250&mus pulse width and frequencies ranging from 20Hz to 40Hz. It provides current pulses for two LD arrays controlled with a proportional-integral (PI) controller and protect LDs against overcurrents and overvoltages. The proposed current control in the thesis reduces current regulation to less than 1% and diminishes overshoots and undershoots to a value less than 1% of steady-state value, which improves safe operation of LDs. Moreover, protection functions proposed in the thesis are able to detect any failure in driver and interrupt LD firing immediately, which guarantees safe operation of LDs.
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David, Romain. "Study and design of integrated laser diode driver for 3D-depth sensing applications." Thesis, Lyon, 2021. http://www.theses.fr/2021LYSE1033.
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Les nouveaux capteurs d’image 3D sont des éléments clés pour exploiter pleinement les applications émergentes dans les domaines de l'imagerie 3D et de la vision par ordinateur telles que la reconnaissance faciale, la capture de mouvement, la détection de présence ou encore la réalité augmentée. Ces capteurs reposent essentiellement sur une technique de mesure de distance. Parmi celles-ci, la mesure indirecte du temps de vol des photons présente l’avantage d’une mise en œuvre simple, fiable et économique appropriée aux applications mobiles grâce au fonctionnement conjugué d’un capteur d’image et d’une diode laser. Le principe consiste à calculer une distance en mesurant le déphasage entre un signal laser infrarouge modulé et le signal optique renvoyé après réflexion sur un objet de la scène. Des impulsions laser avec un rapport cyclique proche de 50\% sont généralement utilisées comme signal laser en modulant le courant à travers une diode laser. Le travail de thèse se focalise sur l'étude et la conception d'un circuit intégré de pilotage de diode laser qui soit à la fois compact, efficace et peu cher, pour des applications d'imagerie 3D utilisées dans les téléphones portables. La nouveauté ici concerne l'intégration du pilote entier (hormis la diode laser et quelques composants passifs) sur une seule puce tout en respectant les contraintes des applications mobiles (faibles tensions d'alimentation, forte intégration). Un autre défi important concerne les pics de tension se produisant pendant les transitoires rapides dus aux inductances parasites. Enfin, un fort rendement électrique s’avère indispensable dans le but de prolonger l’autonomie de la batterie et minimiser l’auto-échauffement. A des fins de comparaison, deux topologies de pilotage différentes, mettant en oeuvre un convertisseur DC/DC associé à un élément de commutation connecté soit en série soit en parallèle de la diode laser, ont été retenues comme base pour concevoir le pilote de diode laser. Deux prototypes ont été réalisés en utilisant une technologie CMOS 130nm de STMicroelectronics, qui sont capables de fournir des impulsions de courant jusqu'à 3A avec une largeur d'impulsion de 2,5ns à une fréquence maximale de 200MHz sous une tension d'alimentation de 3,6V. Dans ces conditions, ils délivrent une puissance électrique de sortie moyenne de 4,5W à la diode laser avec un rendement électrique d'environ 60%Three-dimensional (3D) image sensors are key enablers for unlocking emerging applications in consumer electronics such as facial recognition, presence detection, gesture control or Augmented Reality (AR). These sensors mostly rely on range measuring techniques such as structured-light or Time-of-Flight (ToF) principles. The indirect Time-of-Flight (iToF) principle offers the advantage of a simple, reliable and low cost solution for mobile applications by using a laser transmitter and an image sensor. Its operating principle is to calculate a distance by measuring the phase shift between a modulated infrared laser signal and the optical signal received by the sensor after reflection on an object from the scene. Laser pulses with a duty cycle close to 50\% are usually sent through the scene by modulating the current through a semiconductor laser diode. The thesis is focused on the study and design of a compact, cost-effective and efficient integrated Laser Diode Driver (LDD) for 3D-depth sensing applications used in mobile phones. The novelty here concerns the integration of the whole driver (except laser diode and some passive components) on a single chip while accommodating mobile phone constraints (low supply voltages, high integration). Another important requirement concerns the high voltage spikes occurring during fast transients due to stray inductance. Finally, a high efficiency and low losses in the chip are critical for saving the battery lifetime and minimizing the self-heating. For comparison purposes, two different driving topologies, implementing a DC/DC converter connecting a switching element either in series or in parallel with a laser diode, have been retained as basis for designing the laser diode driver. Two IC prototypes have been realized using a 130nm CMOS technology from STMicroelectronics. Both drivers are able to generate current pulses up to 3A with a 2.5ns pulse width at a maximum 200MHz frequency under a 3.6V supply voltage. Under theses conditions, they provide an average output electrical power of 4.5W to the laser diode with an electrical efficiency of around 60%
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Subramani, Dinesh. "The Diode Laser Source and the Spatial Light Modulator's Driver Electronics for Miniaturized Holographic 3D Imaging." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36409.
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The purpose of this thesis is to develop a low-cost, high power laser diode/fiber illumination system and to design the driver electronics of the spatial light modulator (SLM) for holographic, three dimensional (3D) imaging. A miniaturized laser diode/fiber/polarizing illumination system capable of 15mW of output at a wavelength of 690nm is designed, fabricated, and tested. The size limitations of various commercially available SLM drivers are described and the design to overcome them is suggested. The design describes in detail the timing considerations of the hardware interface and the psuedocode of the software interface between the host computer and the SLM. Experiments carried out to study the spatial uniformity of the SLM and the distortion due to the beam splitter on the structured output from the LIM are explained.Master of Science
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Fučík, Milan. "Optovláknový zdroj laserového záření." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220254.
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This master’s thesis deals with parameters and properties of electromagnetic wave, its spread in environment and then in optical fiber, as well with optical fibers. Principle of laser sources and a issues of coupling a optical performance into optical fiber are described here. Next a function of laser diodes, power and cooling requirements are described. A block diagram of fiber optic source of laser radiation is designed as well as a circuit solution of every single block with respecting of parameters and sensitivity of used laser diode. The protection of laser diode and high-frequency modulation of optical power are solved. Subsequently the construction of every single block was done and the right function of constructional solution was tested.
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Boštík, Jiří. "Řízení laserových diod s využitím mikrokontroléru AVR." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-317223.
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This thesis deals with the design and subsequent realization of laser diode control devices. The circuit will be able to control the diode with using a laser driver, via a computer network or via the display for control current values, setting of initial values and more. The device will be connected also with a SD card for saving of settings. In the theoretical part there are described individual components that are needed for functionality of the device. The practical part contains a block diagram, in which is described complete feature of the device, then a draft scheme with a description of all integrated circuits and important components. At the end of this work is described the software that controls the entire designed device.
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Vrtělková, Hana. "Řízený laserový zdroj pro plašení ptactva." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442349.
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Tato diplomová práce se zabývá problematikou plašení ptáků a jejich humánního plašení pomocí laserů. Práce také pojednává o bezpečnosti laserů, problému řídicího obvodu laserových diod, kolimaci svazku a jeho rozšíření tak, aby výstupní výkon paprsku nepřekročil maximální hodnotu výstupního výkonu laseru třídy 2M.
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Cappuccio, Joseph C. "Semiconductor laser diodes and the design of a D.C. powered laser diode drive unit/." Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/23114.
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This thesis addresses the design, development and operational analysis of a D.C. powered semiconductor laser diode drive unit. A laser diode requires an extremely stable power supply since a picosecond spike of current or power supply switching transient could result in permanent damage. The design offers stability and various features for operational protection of the laser diode. The ability to intensity modulate (analog) and pulse modulate (digital) the laser diode output for data transmission was a major design consideration. Laser optical power is controlled via a closed loop system using a monitor photodiode. Laser diode temperature stabilization is accomplished with the use of a thermoelectric cooler. Laboratory and remote applications were considered in the design of this unit. (rh)
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Hajiaghajani, Kazem 1955. "Design of an optimum driver circuit for CW laser diodes." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/291359.
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A poorly designed drive circuit leads at best to unstable optical output power and/or frequency and at worst to permanent damage to the laser diode. Thermal stress on the laser diode junction and noise from various sources degrade the diode's performance and may result in its damage, and transients may destroy the laser diode outright. This thesis explores all failure mechanisms of a laser diode, and offers solutions to prevent and/or controll them. General drive circuit considerations and requirements of various demanding applications of a CW laser diode are discussed. Finally, a fully functional drive circuit is presented.
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Al-Waisawy, Sara S. "Investigation of Color Phosphors for Laser-Driven White Lighting." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1417065501.
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Sloat, Ronald D. "High-Resolution, Non-Contact Angular Measurement System for PSA/RSA." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/485.
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A non-contact angular measurement system for Pitch Static Attitude (PSA) and Roll Static Attitude (RSA) of hard disk drive sliders is designed and built. Real-time sampling at over 15 KHz is achieved with accuracy of +/- 0.05 degrees over a range of approximately 2-3 degrees. Measuring the PSA and RSA is critical for hard drive manufacturers to control and improve the quality and reliability of hard drives. Although the hard drive industry is able to measure the PSA and RSA at the subassembly level at this time, there is no system available that is able to measure PSA/RSA at the final assembly level. This project has successfully demonstrated a methodology that the PSA/RSA can be reliably measured in-situ using a laser and position sensitive detector (PSD) technology. A prototype of the measurement system has been built using simple and inexpensive equipment. This device will allow a continuous measurement between the parked position on the ramp and the loading position just off of the disk surface. The measured data can be used to verify manufacturing processes and reliability data.
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Yao, I.-Chen, and 姚懿珍. "Laser Diode Driver." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/07856479799443606255.
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碩士國立中央大學
電機工程研究所
89
Two laser diode drivers, of which one is operated at 1.25 Gbps while the other at 2.5 Gbps, are presented in this thesis. Both of them contain a driver, a reference voltage generator, and an automatic power control circuit. In addition, digital control blocks of bias current and modulation current are included in the 2.5 Gbps laser diode driver. TSMC 0.35um 1P4M digital process is used to fabricate these chips. The experimental results demonstrate that the 1.25 Gbps version can work at 1.2Gbps and APC works well, too.
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Dias, Francisco João Cunha. "Laser Diode Pulse Driver." Master's thesis, 2019. https://hdl.handle.net/10216/118960.
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A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
It can have many applications in different fields like communications systems, sensorization equipment, marking and cutting of materials, 3D printing, and many others.
The Laser converts electrical power into optical power, and it is the aim of this project to study pulse modulation techniques, test existing pulse drivers and propose and design electronics for a pulse driver. It's important to understand how Lasers work, their characteristics and limitations, as well as different technics and different concepts of drivers.
Another challenge proposed by the company was to use free software for the design and simulation of circuits as well as for the design of the PCB, being the gEDA tools for the schematic and the PCB and Ngspice for the simulation.
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Wang, Yi-Shiang, and 王乙翔. "Pulse Current-Regulated Laser Diode Driver." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/35505241619682103839.
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碩士國立臺灣大學
電子工程學研究所
101
This thesis focuses on driver for laser diode with large current. According to the previous researches, compare to the method of continuous wave mode, using pulse mode for driving laser diode, which can efficiently reduce the thermal effects also increase the luminous intensity. Thus, we use large current with short pulse for driving laser diode. We also investigate commercial IXLD02SI with experimental result and using HSPICE to simulate the circuit diagram. It can help us find out the key component of the laser diode driver circuit. In this thesis, we present a laser diode driver circuit which output a maximum current of 2Amps and a minimum pulse width of 14ns. It can not only reduce the thermal effects but also improve the system power consumption. Furthermore, in order to control the luminous intensity of laser diode, a laser diode driver circuit which the pulse current and the frequency can be modulated is proposed. We use HSPICE to simulate the proposed laser diode driver circuit for verification.
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Chung, Hung-Chieh, and 鍾宏杰. "Design of High Speed Laser Diode Driver." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/75477196480942274455.
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碩士逢甲大學
電子工程所
99
Proposed the design and implementation of the laser diode driver (LDD) circuitry with large driving current capability and high speed. One of the types is Source Follower Mode Architecture LDD, and another one is Combination Switch Mode Architecture LDD. Source Follower Mode Architecture LDD includes two portions. One of them is Operation Amplifier, and the other one is signal control switch and amplifier driving current circuit. The LDD is designed and implemented in 0.35um 5V CMOS technology and the output driving current is 200mA. The rising time is 0.6ns and the falling is 0.3ns. The chip size is 1.1*0.94mm2. Combination Switch Mode Architecture LDD includes two portions. One of them is current source of Iref, and the other one is signal control switch and amplifier driving current circuit. The LDD is designed and implemented in 0.35um 5V CMOS technology and the output driving current is 200mA. The rising time is 0.2ns and the falling is 0.2ns. The chip size is 1.1*0.94mm2.
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Lin, Ya-Hui, and 林雅慧. "Low Power Laser Diode Driver Circuit Design." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/46745555999887220767.
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碩士大葉大學
電機工程研究所
90
In this thesis, we present two low-power laser diode drivers (Circuit I, and Circuit II), using DC or AC coupling interface circuit to connect it with laser diode. The TSMC 0.35 m 1P4M technology parameters are used to simulate our design. The simulation data rate is 1.25Gbps. For Circuit I, both DC and AC coupling interface circuits are used and can work at 1.25Gbps date rate. For Circuit II, using DC coupling interface circuit will have “headroom” problem, so that the 1.25Gbps data rate cannot be achieved. However, using AC coupling interface circuit to construct Circuit II can work at 1.25Gbps and has less power consumption.
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Chen, Cheng-Sung, and 陳振松. "High-speed Laser Diode Driver Circuit Design." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/52973629806100693743.
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碩士大葉大學
電機工程研究所
90
Two laser diode drivers are presented in this thesis. One is operated at 1.25Gbps while the other at 4.0Gbps. Each of them contains a PECL-to-CMOS logic circuit, a buffer circuit, a modulation circuit, and an automatic power control circuit. Nevertheless, a pulse shaping stage is included in the 4.0Gbps laser diode driver for improvement. The simulated results are presented and discussed. We use the TSMC 0.35um 1P4M technology parameters for the designs and fabricate these two chips with the help of CIC. We also discuss the interface problems of laser diodes and build a laser diode model for circuit simulation.
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Chen, Meng-Kun, and 陳盟坤. "High-Speed Laser Diode Driver for Optical Communication." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/28636649018505446752.
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碩士大葉大學
電機工程學系碩士班
91
The requirement for high-speed bandwidth of optical communication increases day by day. This thesis indicates a high-speed laser diode driver which is applied to the STS-18 (OC-18) of the SONET. We use AC coupling interface technique to connect driver circuit and laser diode. The laser diode driver is implemented in TSMC 0.35μm 1P4M process, and the data rate is about 1.25Gbps. It includes three blocks: PECL (Positive-Referenced Emitter-Coupled Logic) to CMOS logic circuit、 modulation current generation circuit and bias current generation circuit. We adopt the AC Coupling interface circuit to solve Headroom’ problem and use the Return-to-Zero coding in optical communication.
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Liou, Shih-Chi, and 劉士頎. "The High-Speed Laser Diode Driver with Reaction Time." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/78553834153258529836.
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碩士逢甲大學
電子工程所
99
Laser Diode Driver (LDD) can be find in many applications optical disks such as CD, DVD, Blue-ray disc, and fiber-optical communication….etc. Today the data is bigger and more complex than before. Therefore, a high-speed LDD is very important with high capacity optical store devices and high-speed optical communication. In this paper, we focus on design of high speed and large current Laser Diode Driver for DVD/CD Read/Write. We main target to enhance rising time, falling time, reaction time, overshoot/Undershoot (<10%) and corner case (FF SS FS SF). The design of high-speed Laser Diode Driver with reaction time was implemented in a 5V 0.35-μm CMOS technology. The overall chip area is 1.070×1.376 mm2 and the power consumption is 1000 mW.
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Yu, Ruo-Tian, and 于若天. "Research on Laser Diode Driver with Large Current Pulse." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/78253760391288074829.
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碩士國立臺灣大學
電子工程學研究所
97
This thesis focuses on driver for laser diode with large current and which makes a short pulse current for driving laser diode. The driver will be applied to portable electronic products. The structure of the driver driving and sensing external discrete circuits is composed of Schmitt trigger structure, non-overlapping clock generator and output driver circuit. First, some laser diode driver circuits are reviewed. After comparing strengths and weaknesses of the circuits, a suitable driver circuit is chosen to design external discrete circuit. Second, a new control circuit is designed for driving this external discrete circuit. In addition, the control circuit is designed to re-develop a simple and effective driver. Finally, the circuit is simulated by HSPICE, the layout is designed, and the chip is tested.
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Pei-Ju, Tsai, and 蔡沛儒. "Design of High Speed Laser Diode Driver with Inductance Simulation." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/04047401459198418736.
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碩士逢甲大學
電子工程學系
103
This proposed is against the difference value between real chip circuit measurement and simulation result, and we want to find out the element which cause the difference. The LDD structure is still according to SFM (Source-Follow Module), this design is apply to DVD/CD player. We are basic on reference [15] and modify the circuit design with compare, and then we can know the influence of positive component. There are three part of circuit simulation, part I we addition an inductance at vout, part II we addition an inductance between voltage source and LDD circuit, part III is assemble the part I and part II. In the future, we will use TSMC 0.35μm 5V CMOS process to complete our circuit design, and use the HSPICE software for simulation and analysis.
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Liao, Hong Yi, and 廖弘毅. "2.5Gbps Laser Diode Driver with Auto Power Control/Auto Biasing circuit." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/24196723977450622341.
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碩士國立清華大學
電機工程學系
90
Providing high speed, wide bandwidth, and low loss communication environment, optical fiber communication plays an important role of high-speed data transmission in recent years. To implement optical communication system, the laser diode driver is required to convert electrical signal to optical signal, and the quality of the system depends on the performance of the driver. In our thesis, a 2.5Gbps laser diode driver with Auto Power Control/Auto-Biasing circuit is proposed and designed by a 0.35 um 1P4M process. The Auto-Biasing circuit proposed can provide more accurate bias current to reduce 5% extra power consumption and to improve 8.9% extinction ratio.
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蔡怡進. "Design of High Speed Laser Diode Driver with Source-Follower mode." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/74261850216951824238.
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黃家峻. "Design of High Speed Laser Diode Driver with Rising Edge-Detecting Technique." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/59503746086322938600.
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Yu, Chang-Ying, and 游長穎. "Current-Pulse Driver Using a Capacitor-Free Low Dropout Regulator for Laser Diode." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/49483980678395811413.
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碩士國立臺灣大學
電機工程學研究所
97
Low dropout regulator (LDO) has been generally applied for several battery-powered portable electronic applications, such as cellular phone, digital camera, PDA, and so on. Compared with a switch-mode power supply, an LDO features has faster transient response, lower noises, less volume, less cost and only need a few off-chip devices. Stability is always an important issue while designing an LDO. In conventional compensation scheme, in order to guarantee system stability of LDO, it required an off-chip capacitor and its parasitic equivalent series resistance (ESR) values must fall into a specific tunnel-like region. The ESR is normally not well controlled. In this thesis, an LDO with spilt-structured pass element using the pole-zero pairs compensation is proposed. It achieves a capacitor-free LDO. Namely, the load capacitor and the ESR of the load capacitor are no longer required for stability consideration. The proposed LDO is 3.3V/300mA and a minimum dropout voltage of 0.2V for 300mA of output current, using a 0.5-μm 1P3M CMOS technology. Furthermore, a current-pulse driver for laser diodes using the capacitor-free LDO regulator structure is proposed. The capacitor-free LDO regulator, which provides a constant current, and two off-chip switching power MOSFETs to generate pulse current through the laser diode. A 225mA/20ns current-pulse driver has been fabricated using a 0.5-μm 1P3M CMOS technology.
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Huang, Kun-Shuan, and 黃崑軒. "The Multi- Functional Automatic Optical Power Control Driver Circuit Design for LASER Diode." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/28658555498639907160.
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碩士國立暨南國際大學
光電科技碩士學位學程在職專班
101
Title of Thesis：The Multi- Functional Automatic Optical Power Control Driver Circuit Design for LASER Diode Name of Institute：Graduate Program of Optoelectronic Technology, College of Science and Technology, National Chi Nan University Pages：64 Graduation Time：Jan/2013 Degree Conferred：Master Student Name：Kun-Shuan Huang Advisor Name：Dr. Tai-Ping Sun Abstract In this thesis, the design of PWM (Pulse Width Modulation) circuit to drive the LASER diode (ADL-65102TL Arima) and comparison of changes in optical power drive mode to do a variety of PWM circuit. LASER diode lit easily affected by temperature, changing the output optical power, temperature rise LASER diode characteristics of the forward bias decreases as temperature detection function, re-use pulse width modulation compensation LASER diode with temperature rise the decline of the light power, reach auto optical power purposes. Analyzing the effect of two polar bodies in different temperature change four kinds of PWM drive mode: ACC (Automatic Constant Current Control Mode), AEC (Automatic Electrical Power Control Mode), APC (Automatic Photo Power Control without Photo Diode Mode) and APC with PD (Automatic Photo Power Control with Photo Diode Mode) mode the optical power changes. Automatic power control system has been confirmed through the experiments to maintain the stability of the optical power in ambient temperature of 0℃ ~ 55℃. APC with PD architecture, the APC without PD architecture performance followed, but for only a simple the ACC & AEC drive circuit to compare obvious improvement. Key words：PWM;APC;LASER diode
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Zeng, Sheng-Gao, and 曾高陞. "Study on Automatic Current and Photon-Power Control Integrated Circuit Design for Laser Diode Driver." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/08601843541084995997.
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碩士國立暨南國際大學
電機工程學系
94
The automatic power control circuit is designed in the cw operation and pulse operation. Both 5mW and 10mW laser diode can operate to 50℃. Optical output power still can be maintained and will not drop under CW operation. The automatic power control circuit can also operate steadily under the pulse operation. Observe laser diode pulse operation, the pulse width is smaller , it is smaller to influence by temperature. Automatic current control circuit can supply 40mA to drive 5mW and 10mW laser diode. Two output stages are designed to supply 80mA to drive 20mW laser diode. The automatic current control circuit is designed with power supply verification and temperature verification. The automatic power control and the automatic current control circuit can show the optical output power steadily.
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Chiu, Mao-Cheng, and 邱茂成. "A 10-Gb/s Laser Diode Driver with Active Back-Termination in 0.18um CMOS Technology." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/hs79u3.
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Kao, Yuan-Chun, and 高元俊. "Design of PAM-4 and 10-Gb/s Common Cathode Laser Diode Driver Integrated Circuits." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/37414826935159468749.
Full textAbstract:
碩士國立高雄應用科技大學
電子工程系碩士班
102
In this thesis, two optical transmitter circuits are designed for optical communication systems, and their output current signals use the different modulation methods. Those circuits were designed and simulated in TSMC 0.18μm CMOS process technology. The first laser diode driver(LDD) was designed using common cathode for reducing noise interference and signal distortion. The LDD used the capacitively couple current amplifier(C3A) to improve the switching time of LDD. The LDD can be operated at 10-Gb/s non-return zero(NRZ) data; its modulation current can be adjusted from 2 to 13 mA. The LDD suits for OC-192 system or 10-Gb Ethernet. The second LDD was designed for four-level pulse amplitude modulation(PAM-4) to reduce the required circuit bandwidth and easy design of high-speed circuits. The LDD can transmit 5-Gb/s data; its total modulation current can be adjusted from 0 to 9 mA; and its bias current can be set from 0 to 10 mA. Using the same PAM-4 decode receiver circuit, the LDD can be applied in high-speed optical fiber transmission interface.
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LIN, CHENG_FENG, and 林志峰. "The Designs of High-Performance Laser Diode Driver and High- Speed Multiplier for Specific Applications." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/60713243241655035589.
Full textAbstract:
碩士國立海洋大學
電機工程學系
86
In this thesis, two integrated circuit design methods are applied design of two application specific integrated circuits. We first use the full custom design method to design a high- performance laser diode driver circuit. While field programmable gate array design method is then used to design a high-speed multiplier.Automatic current control(ACC) architecture is used for this proposed high-performance laser diode driver circuit. A specific switching approach is also used to decrease the power consumption of the driver corcuit. We started the circuit design with the Hspice simulation. When the simulation is done, we proceed to do the circuit layout and the layout verification. The driver circuit is fabricated successfully with 0.5μm Double-Poly-Double-Metal N-Well CMOS processing technology of unit microelectronic company. The core area of the chip is about 900μm×900μm. In the experimental measurement, the integrated circuit chip displays a very good characteristic to supply laser diode driver with very stable optical output power up to tenth of milliwatt. With the low power design approach, the driver circuit can make the battery operation time twice longer as compared with the conventional circuit.The designed high-speed multiplier contains booth encoding, partial product reduced and carry selector adder. In this high-speed multiplier design, we used schematic edit as the design entry . After the schematic edit, we proceed to do the synthesis and the simulation with the Xilinx Foundation FPGA software. This multiplier circuit is verified with the hardware circuit. The simulation result shows that the multiplier takes only 48.411ns for processing one data.
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Luo, Yi-Cyun, and 羅毅群. "Study on Novel Driver Circuit System Design with Automatic Optical Power Control for Laser Diode." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/13679970582999497176.
Full textAbstract:
碩士國立暨南國際大學
電機工程學系
98
The main purpose of this thesis is to compare the laser diode opto-electrical characteristic to be controlled by continual wave(CW) and pulse wave(PW) mode at different control system. The control circuit include automatic current control circuit(ACC), automatic electrical power control circuit(AEC), automatic optical power control circuit APC(with PD) and automatic optical power control circuit APC(without PD), the main purpose use feedback compensation principle to reduce temperature effects on system. In CW mode, APC(with PD) and APC(without PD) have good performance with characteristic of optical power stability, AEC has good performance with characteristic of electrical power stability, and ACC has good performance with short wavelength shift of laser diode. The short duty cycle of PW mode has good performance whatever characteristic of optical power stability, electrical power stability or wavelength shift of laser diode.
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陳偉傑. "Design of CMOS laser diode driver and integrated front-end receiving circuit for optical fiber communications." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/40627870008403129962.
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Wu, Tsung-Yen, and 吳宗諺. "Design of 25 Gb/s and 50 Gb/s PAM-4 Laser Diode Driver Integrated Circuits." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/uhgb4h.
Full textAbstract:
碩士國立高雄科技大學
電子工程系
107
In this thesis, high-speed four-level pulse amplitude modulation (PAM-4) laser diode driver circuits were designed and applied to the transmitter in optical fiber communication systems. The first chip was designed in TSMC 90nm CMOS technology. This circuit includes an equalizer, a negative capacitor, and a delay duty adjuster circuit (DDAC) which is used to achieve the pre-emphasis, to improve the circuit bandwidth. The PAM-4 signal can be generated by the current steering circuit. The chip can be operated at 25-Gb/s (12.5-Gbaud) PAM-4, the modulation current is 2.8-mA, the power consumption is 70.4-mW, and the chip size is 0.538 x 0.6059 mm2. The second chip was designed in TSMC 90nm CMOS technology. The equalizer circuit is composed of an amplifier and an edge peak generator. According to the measurement results, the chip can be operated at 40-Gb/s (20-Gbaud) PAM-4, the bit error rate can below 10-12, and the modulation current is 3.2-mA. The power consumption of the chip is 57.2-mW and the chip size is 0.4987 x 0.4987 mm2. The third and fourth chips were designed in GaAs 0.15-μm pHEMT process technology for driving DFB laser diodes or MZ optical modulators. The third chip is a basic current steering circuit, and the fourth chip has a pre-driver. Through the circuit simulations, the chips were verified to be operated at 50-Gb /s NRZ or 100-Gb/s PAM-4. The size of the both chips are 1 x 1 mm2 in size.
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Chen, Yan Wen, and 陳彥文. "The Design and Implementation of Vertical-Cavity Surface-Emitting Laser Diode Driver and Low-Voltage Differential Signaling." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/79948495984629626326.
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碩士國立清華大學
工程與系統科學系
104
This thesis includes two parts, namely the laser diode driver circuit design and low-voltage differential signal circuit design and measurement, both of them will be described in detail in each part of the design flow and illustrated the principle of operation by intuition. Laser diode driver circuit design includes the use of circuit simulation software and layout of the whole laser diode driver circuit. Also how to simulate the fiber modules. The light signals pass through the optical fiber because of chromatic dispersion and other effects caused by the ISI, which will affect the accuracy of the signal read out. This laser diode driver uses the taps architecture to cancel the ISI effect to ensure that the data can be read out correctly at high frequency. The principle of the circuits operation will be illustrated in the time domain. The laser diode drive circuit layout has few critical points need to know at high frequency operation, suck as matching and alignment, etc. Those key points illustrate in detail. LVDS circuit design considers the large amounts of data that can be transmitted per unit of time and achieves low jitter, common mode characteristic and signal integrity. This part design of modified hysteresis receiver and buffer, while the measurement can receive fast and correct data. This LVDS chip using 0.18 micron process and operating at 1.8 volts with the design of high-speed PCB can reach 500Mbps of eye diagram, and comply the specifications of LVDS. This chip contains four channels, which difference with the buffer, all of the channels can achieve 500Mbps eye diagram at measurement. It confirms the reproducibility and the reliability of this chip.
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Hsieh, Ming Chiao, and 謝明僑. "Study of PWM Driver Circuit Design for Automatic Optical Power Control with Photo Diode of Semiconductor LASER." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/86171694285423498732.
Full textAbstract:
碩士國立暨南國際大學
光電科技碩士學位學程在職專班
101
This thesis is mainly driven pulse Arima ADL-65102TL AlGalnP Visible LASER diode. specific plot small easy to drive light emitting the LASER diode lit easily affected by temperature, the use of pulse width modulation techniques the design the LASER diode automatically given optical power feedback control circuit, and to take advantage of the Photo diode detector photocurrent characteristics in accordance with the LASER diode LASER diode detected optical power intensity feedback control LASER diode driver. Then use a bandpass filter to filter out non-control signal-to-noise and the use of pulse width modulation control LASER diode with increasing temperature down to change the optical power, optical power with anti-noise and less than 3% to reach a stable control automatically given optical power control purposes. The analysis automatically set the optical power feedback control with different drive (CC、ACC、APC) under LASER diode optical power characteristics for different temperature. This article analyzes, in the case of temperature changes, the use of Photo diode automatically given control of the optical power of less than 3% of the optical power can be effectively controlled.
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Chuang, Chia-ming, and 莊家銘. "Design of High-Speed Laser Diode Driver with Low Sensitivity to Process Variation and Improvement on Overshoot Performance." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/00710743444455088294.
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碩士逢甲大學
電子工程所
99
Here, proposed a high speed and large current laser diode driving circuit with low sensitivity to process variation and improvement on overshoot performance, mostly applied in the DVD player. In the large current and high speed output laser diode driver circuit, in order to improve signal integrity, and reduce the impacts caused by temperature, voltage, process and environmental. Therefore, modifications on the Combination Switch Mode Laser Diode Driver Architecture [9]was made. So we proposed the Source Degeneration Type Combination Switch Mode Laser Diode Driver Architecture. Furthermore, topics such as overshoot, undershoot, rising time and falling time are necessary to be considered. The simulation results show that the output current turned slightly slower in speed, whereas the performance in overshoot and undershoot are significantly improved. Finally, we proposed the Source Degeneration Type with Improve Overshoot Performance Laser Diode Driver Architecture. The circuit has been implemented in 0.35um 5V CMOS process and simulated by HSPICE. And the Cadence Virtuoso Layout Editor to complete the circuit layout of the work. The overall chip area is 1.074*0.948mm2.
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Chen, Yu-Cheng, and 陳祐誠. "Design of Gigabit CMOS Laser Diode Drivers with Adjustable Current." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/94744841121665196391.
Full textAbstract:
碩士國立高雄應用科技大學
電子工程系
98
This thesis focuses on the design of the transmitter circuits for the optical communication systems. In this thesis, the laser diode driver (LDD) and the automatic power control (APC) circuits are designed using the TSMC 0.35μm complementary metal-oxide-semiconductor (CMOS) process. First, the design of 1.25 Gbps LDD is achieved. The bias current of the LDD can be adjusted from 4 mA to 17 mA, and the modulation current can be adjusted from 0.3 mA to 26 mA. Then, another LDD with the predriver is also designed. The predriver can provide sufficient output voltage for switching the current-steering output stage. The bias current of the LDD can be adjusted from 17 mA to 23.5 mA, and the modulation current can be adjusted from 0.2 mA to 66.3 mA, Finally, we also design the APC circuit. Because the LD’s L/I characteristics are temperature and time dependent, the APC could stabilize the output range from 0 mA to 13.3 mA.
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Tseng, Te-Ming, and 曾德銘. "High-speed Laser Diode Drivers with an Auto-Power Control Technique for Optical Transmission." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/38112666770203124064.
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碩士國立中興大學
電機工程學系所
94
One of the most important factors for applying optical system is its cost. Conventionally, high speed optical transceivers are implemented in expensive GaAs process. Nowadays, with the blooming progress in VLSI technology, several GHz front-end circuits in CMOS and SiGe process have been successively demonstrated. This thesis explores circuit techniques for optical transmitter front-end design in 0.35µm BiCMOS technology. The objective goals of this research are to realize a single chip of 3.3V high speed (3.125Gb/s & 10Gb/s) optical transmitter front-end ICs including laser diode drivers, and auto-power control circuits. In the thesis two different kinds of laser diode drivers are presented. The output driving value of modulated and bias current can operate form 10mA to 100mA. In order to supply enough current to reach the maximum desired optical output power with a low-efficiency laser and high threshold current under high- temperature. Because of the strong temperature and age dependence of the laser’s L/I curve, laser diode driver need a feedback mechanism so-called auto-power control (APC) that actively maintains consistent laser diode performance by continuously monitoring the optical output and correcting it for variations caused by changes in operating temperature and laser diode degradation. In the thesis two kinds of APC circuit are presented. One is an analog dual loop control which can maintain constant output power without disturbing extinction ratio another has both analog and digital control mechanism which not only has same advantage of last control mechanism but also can control the bias current more accurate. In order to apply in burst mode optical transmitter the second auto-power mechanism also can store the selected power level in up-down-counter which help the feedback loop to be stable faster.
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Cheng, Meng-Ru, and 程孟如. "Nonlinear dynamics of self-pulsating laser diodes under an external drive." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/23215849443902688452.
Full textAbstract:
碩士國立交通大學
應用數學系
87
A high-dimensional self-pulsating laser diode under an external drive shows the nonlinear dynamical effects of two competing frequencies. Route to chaos can be established by increasing the modulation current. However, by the varying the modulation frequency, the chaotic state is suddenly destroyed at the harmonic frequencies of the self-pulsating frequency. This approach offers a simple chaotic light source for possible optical chaotic communication.
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Bescherer-Nachtmann, Klaus. "Fibre-Loop Ring-Down Spectroscopy Using Liquid Core Waveguides." Thesis, 2013. http://hdl.handle.net/1974/7906.
Full textAbstract:
Cavity ring-down spectroscopy has been used over the last twenty years as a highly sensitive absorption spectroscopic technique to measure light attenuation in gases, liquids, and solid samples. An optical cavity is used as a multi-pass cell, and the decay time of the light intensity in the cavity is measured, thereby rendering the techniques insensitive to light intensity fluctuations. Optical waveguides are used to build the optical cavities presented in this work. The geometries of such waveguides permit the use of very small liquid sample volumes while retaining the advantages of cavity ring-down spectroscopy.
In this thesis cavity ring-down measurements are conducted, both, in the time domain and by measuring phase-shifts of sinusoidally modulated light, and the two methods are theoretically connected using a simple mathematical model, which is then experimentally confirmed. A new laser driver, that is compatible with high powered diode lasers, has to be designed to be able to switch from time domain to frequency domain measurements.
A sample path length enhancement within the optical cavity is explored with the use of liquid core waveguides. The setup was optimised with respect to the matrix liquid, the geometrical matching of waveguide geometries, and the shape of liquid core waveguide ends. Additionally, a new technique of producing concave lenses at fibre ends has been developed and the output of a general fibre lens is simulated.
Finally, liquid core waveguides are incorporated into a fibre-loop ring-down spectroscopy setup to measure the attenuation of two model dyes in a sample volume of <1 µL. The setup is characterized by measuring concentrations of Allura Red AC and Congo Red from 1 µM to a limit of detection of 5 nM. The performance of the setup is compared to other absorption techniques measuring liquid samples.Thesis (Ph.D, Chemistry) -- Queen's University, 2013-04-23 14:08:16.33