Relevant bibliographies by topics / Electro-optical modulation

Academic literature on the topic 'Electro-optical modulation'

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Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Electro-optical modulation"

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Chang, Chia‐Cheng, Chih‐Ping Chen, Che‐Chung Chou, Wen‐Jang Kuo, and Ru‐Jong Jeng. "Polymers for Electro‐Optical Modulation." Journal of Macromolecular Science, Part C: Polymer Reviews 45, no. 2 (April 2005): 125–70. http://dx.doi.org/10.1081/mc-200055482.

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Zalesski, V. B., A. I. Konoiko, V. M. Kravchenko, and H. S. Kuzmitskaya. "Amplitude electro-optical modulation of radiation by sequences of Fabry-Perot resonators." Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series 56, no. 2 (July 8, 2020): 217–23. http://dx.doi.org/10.29235/1561-2430-2020-56-2-217-223.

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In this paper, we considered the method of amplitude electro-optical modulation of radiation using sequences of Fabry-Perot resonators based on the transverse electro-optical effect on the example of lithium niobate LiNbO3. With this method, it is possible to significantly reduce the voltage of the control electromagnetic field of the electro-optical amplitude modulator operating in the transmission mode of the light beam while maintaining its high efficiency. The reduction of the control voltage is achieved by increasing the number of Fabry-Perot resonators installed in series and the phase shift relative to the extremum of the transmittance function. This method allows to diminish the duration of the received light signals which leads to an increase in the clock frequency while maintaining a high efficiency of the radiation modulation. Diminishing the duration of light signals is achieved by using separate modulation channels of two sequences of electro-optical Fabry-Perot resonators, the first of which works on the transmission and the second one on the reflection. Increasing the clock frequency at the output of the modulator is achieved by summing the signals coming from several modulation channels. It is shown that the value of the control voltage for an amplitude electro-optical modulator based on a sequence of Fabry-Perot resonators made of lithium niobate LiNbO3, with an operating wavelength of 1.307 microns, can be 4 V in the case when its initial operating point corresponds to the maximum transmittance. The control voltage is 2 V if the initial operating point is shifted in phase relative to the extremum of the transmittance function.
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Chen, Der Chin, and Jing Yuan Su. "Near-Infrared Electro-Optics Modulation Coding Technology Using the Aperture Module with the Changeable Stop." Applied Mechanics and Materials 284-287 (January 2013): 2872–75. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.2872.

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In this paper we demonstrate a new technology in which we use the spatial optical modulation with trigger pulse width and pulse width modulation of light source (LED,LD) to build the near-infrared electro-optics modulation coding system (NIEOMCS). Using the optical coupler to let the pulse modulation near infrared LED collimated light of transmitter enter into an optical fiber and spatial optical modulator, the electro-optics modulation signal is then detected by the photodiode of the receiver. Because of aperture module with three changeable stop sizes and three duty cycles of light signal, there are 27 kinds of code modes in this system. When the receiver aperture is smaller than the correlation length of fading and the observation interval is shorter than the correlation time of fading, the modulation code error rate of the modulation system occurring is less than 0.2%.
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Sorger, Volker J., Norberto D. Lanzillotti-Kimura, Ren-Min Ma, and Xiang Zhang. "Ultra-compact silicon nanophotonic modulator with broadband response." Nanophotonics 1, no. 1 (July 1, 2012): 17–22. http://dx.doi.org/10.1515/nanoph-2012-0009.

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AbstractElectro-optic modulators have been identified as the key drivers for optical communication and signal processing. With an ongoing miniaturization of photonic circuitries, an outstanding aim is to demonstrate an on-chip, ultra-compact, electro-optic modulator without sacrificing bandwidth and modulation strength. While silicon-based electro-optic modulators have been demonstrated, they require large device footprints of the order of millimeters as a result of weak non-linear electro-optical properties. The modulation strength can be increased by deploying a high-Q resonator, however with the trade-off of significantly sacrificing bandwidth. Furthermore, design challenges and temperature tuning limit the deployment of such resonance-based modulators. Recently, novel materials like graphene have been investigated for electro-optic modulation applications with a 0.1 dB per micrometer modulation strength, while showing an improvement over pure silicon devices, this design still requires device lengths of tens of micrometers due to the inefficient overlap between the thin graphene layer, and the optical mode of the silicon waveguide. Here we experimentally demonstrate an ultra-compact, silicon-based, electro-optic modulator with a record-high 1 dB per micrometer extinction ratio over a wide bandwidth range of 1 μm in ambient conditions. The device is based on a plasmonic metal-oxide-semiconductor (MOS) waveguide, which efficiently concentrates the optical modes’ electric field into a nanometer thin region comprised of an absorption coefficient-tuneable indium-tin-oxide (ITO) layer. The modulation mechanism originates from electrically changing the free carrier concentration of the ITO layer which dramatically increases the loss of this MOS mode. The seamless integration of such a strong optical beam modulation into an existing silicon-on-insulator platform bears significant potential towards broadband, compact and efficient communication links and circuits.
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Feng, Song, Lian-bi Li, and Bin Xue. "Research on a Micro-Nano Si/SiGe/Si Double Heterojunction Electro-Optic Modulation Structure." Advances in Condensed Matter Physics 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/8297650.

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The electro-optic modulator is a very important device in silicon photonics, which is responsible for the conversion of optical signals and electrical signals. For the electro-optic modulator, the carrier density of waveguide region is one of the key parameters. The traditional method of increasing carrier density is to increase the external modulation voltage, but this way will increase the modulation loss and also is not conducive to photonics integration. This paper presents a micro-nano Si/SiGe/Si double heterojunction electro-optic modulation structure. Based on the band theory of single heterojunction, the barrier heights are quantitatively calculated, and the carrier concentrations of heterojunction barrier are analyzed. The band and carrier injection characteristics of the double heterostructure structure are simulated, respectively, and the correctness of the theoretical analysis is demonstrated. The micro-nano Si/SiGe/Si double heterojunction electro-optic modulation is designed and tested, and comparison of testing results between the micro-nano Si/SiGe/Si double heterojunction micro-ring electro-optic modulation and the micro-nano Silicon-On-Insulator (SOI) micro-ring electro-optic modulation, Free Spectrum Range, 3 dB Bandwidth, Q value, extinction ratio, and other parameters of the micro-nano Si/SiGe/Si double heterojunction micro-ring electro-optic modulation are better than others, and the modulation voltage and the modulation loss are lower.
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Battal, Enes, Ayse Ozcan, and Ali Kemal Okyay. "Resistive Switching-based Electro-Optical Modulation." Advanced Optical Materials 2, no. 12 (September 8, 2014): 1149–54. http://dx.doi.org/10.1002/adom.201400209.

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Li, Miaofeng, Xi Xiao, Qi Yang, and Shaohua Yu. "40 Gbaud binary phase shift keying signal modulation using a substrate removed silicon modulator." Modern Physics Letters B 31, no. 19-21 (July 27, 2017): 1740009. http://dx.doi.org/10.1142/s0217984917400097.

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Substrate removing technique is proposed in silicon Mach–Zehnder modulator (MZM) to improve the electro-optic bandwidth. Based on this technique, a silicon MZM with 3 dB electro-optical bandwidth of 55 GHz is achieved at 5 V reverse bias for the first time. The V[Formula: see text] L of the modulator is 1.3 V[Formula: see text]cm with an on-chip insertion loss of 5.4 dB. The substrate removing technique reduces the electrode transmission loss, achieves the electro-optical group index matching and realizes 50 [Formula: see text] impedance matching, simultaneously. In this work, we experimentally demonstrate BPSK modulation based on this modulator at the baud rate up to 56 Gb/s.
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Amin, Rubab, Can Suer, Zhizhen Ma, Ibrahim Sarpkaya, Jacob B. Khurgin, Ritesh Agarwal, and Volker J. Sorger. "Active material, optical mode and cavity impact on nanoscale electro-optic modulation performance." Nanophotonics 7, no. 2 (October 25, 2017): 455–72. http://dx.doi.org/10.1515/nanoph-2017-0072.

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AbstractElectro-optic modulation is a key function in optical data communication and possible future optical compute engines. The performance of modulators intricately depends on the interaction between the actively modulated material and the propagating waveguide mode. While a variety of high-performance modulators have been demonstrated, no comprehensive picture of what factors are most responsible for high performance has emerged so far. Here we report the first systematic and comprehensive analytical and computational investigation for high-performance compact on-chip electro-optic modulators by considering emerging active materials, model considerations and cavity feedback at the nanoscale. We discover that the delicate interplay between the material characteristics and the optical mode properties plays a key role in defining the modulator performance. Based on physical tradeoffs between index modulation, loss, optical confinement factors and slow-light effects, we find that there exist combinations of bias, material and optical mode that yield efficient phase or amplitude modulation with acceptable insertion loss. Furthermore, we show how material properties in the epsilon near zero regime enable reduction of length by as much as by 15 times. Lastly, we introduce and apply a cavity-based electro-optic modulator figure of merit, Δλ/Δα, relating obtainable resonance tuning via phase shifting relative to the incurred losses due to the fundamental Kramers-Kronig relations suggesting optimized device operating regions with optimized modulation-to-loss tradeoffs. This work paves the way for a holistic design rule of electro-optic modulators for high-density on-chip integration.
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Kanojka, A. I. "Amplitude modulation of radiation by coupled resonators." Doklady BGUIR 18, no. 6 (October 1, 2020): 18–24. http://dx.doi.org/10.35596/1729-7648-2020-18-6-18-24.

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In this paper, we describe a method that allows one to realize highly efficient amplitude modulation of radiation at the output of electro-optical laser switches with two coupled resonators, in which electro-optical elements are located both in two split arms and in every arm of a multipath interferometer with combined channels with a control voltage 2 times lower than in existing laser switches. Moreover, the electro-optical elements located in the two split arms of a multipath interferometer with combined channels, with one passage of the light flux through the electro-optical element, must make the opposite controlled changes in the phase difference of the interfering light beams. Therefore, for such electro-optical switches with two coupled resonators the value of the required electric power will be, respectively, 2 times less than that of the existing ones, which significantly expands their operating frequency range. In this case, a laser switch with electrooptical elements located in the two split arms of a multipath interferometer has an asymmetric dependence of the output radiation intensity on the change in the phase difference of the interfering light beams relative to the zero value of the light intensity. A laser switch with electro-optical elements located on all arms of a multipath interferometer with combined channels has a symmetric dependence of the output radiation intensity on the magnitude of the phase difference of the interfering light beams relative to the zero value of the light intensity. In addition, due to the coherent summation of the amplitudes of the interfering light waves, such laser electro-optical shutters also have amplification of radiation with a resonant wavelength.
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Sharif, Morteza A., Bijan Ghafary, and M. H. Majles Ara. "A Novel Graphene-Based Electro-Optical Modulator Using Modulation Instability." IEEE Photonics Technology Letters 28, no. 24 (December 15, 2016): 2897–900. http://dx.doi.org/10.1109/lpt.2016.2624562.

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Dissertations / Theses on the topic "Electro-optical modulation"

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Thorn, Andrew Peter. "Electro-optical modulation in III-V semiconductors." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/46578.

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Riedel, Christoph Alexander. "Transparent conductive oxide based hybrid nanostructures for electro-optical modulation." Thesis, University of Southampton, 2018. https://eprints.soton.ac.uk/420940/.

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In the last decades, plasmonic resonant nanoantennas have created interest in a wide range of research fields that deal with light confinement on the nanoscale. One promising new research branch involves electrically switchable optical properties, which are scaled down to sub-μm size using plasmonic structures. In this thesis, samples with antenna structures whose resonances can be electrically modulated were designed, fabricated and characterised both electrically and optically. A comprehensive analytical study on the interaction of carrier modulation and optical antennas showed that shifts of the resonance wavelength depend on the antenna aspect ratio and material, and are enhanced if the surrounding medium’s permittivity is near zero. The simulation capabilities of the properties of transparent conductive oxides were successfully utilised to design an ultrathin optical solar reflector that selectively radiates visible and nearinfrared light while strongly absorbing mid-infrared light. The measured solar absorptance was 0.12 and the IR emissivity 0.79. Such selective reflectors can replace currently-used metallised quartz tiles to reduce launch costs of spacecraft. Combining electrical and optical simulation models with nanoscale resolution, a novel modulator structure was designed. By directly electrically addressing nanoantennas, a modulator was enabled to perform in transmission additionally to reflection. Reducing the ITO volume to a gap-filling removed negative impacts of the ITO background, so that the resulting modulator could freely shift the resonance of the antenna. The final structure showed a greatly enhanced amplitude modulation of 45% and a resonance shift of 38nm at 1550nm with an applied electric field of 1Vnm−1. Fabricated structures showed that the placing of an ITO gap-loading can be achieved by taking into account height alignment errors of current e-beam systems. Experiments on a planar electrical modulator with a TiN-HfO2-ITO stack showed first electro-optical modulation results, which can benefit from the design developed with the simulation model. The promising results obtained in this thesis open a new pathway for electro-plasmonic modulation in a variety of structures such as tunable reflectors and transmitters in free space or on silicon waveguides.
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Chretien, Jacques. "Développement de micro-modulateurs électro-optiques à base de matériaux à coefficients géants." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2014/document.

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Cette thèse a pour but de développer de nouveaux procédés de fabrication dansle cadre de la réalisation de composants électro-optiques basés sur l’utilisation dematériaux à coefficients géants.A travers le développement de procédés de mises en forme inovants, différentsaspects théoriques et expérimentaux ont été abordés notamment avec la mise enplace d’un procédé de repolarisation dédié au Niobate de Strontium Baryum
The objective of this thesis is to develop new manufacturing processes within theframework of the realization of electro-optical components based on specifics materialswith giant electro-opticals coefficients.Through the development of inovative methods, various theoretical and experimentalaspects were addressed, in particular through the implementation of a repolarizationprocess dedicated to Strontium Barium Niobate
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Allibe, Julie. "Développement et intégration de films minces du multiferroïque BiFeO3 pour la modulation électro-optique et le contrôle électrique d'une aimantation." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112091.

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Jacobsson, Fredrik. "DPSK modulation format for optical communication using FBG demodulator." Thesis, Linköping University, Department of Science and Technology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2307.

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The task of the project was to evaluate a differential phase shift keying demodulation technique by replacing a Mach-Zehnder interferometer receiver with an optical filter (Fiber Bragg Grating). Computer simulations were made with single optical transmission, multi channel systems and transmission with combined angle/intensity modulated optical signals. The simulations showed good results at both 10 and 40 Gbit/s. Laboratory experiments were made at 10 Gbit/s to verify the simulation results. It was found that the demodulation technique worked, but not with satisfactory experimental results. The work was performed at Eindhoven University of Technology, Holland, within the framework of the STOLAS project at the department of Electro-optical communication.

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Pagano, Carlo [Verfasser], and Christian [Akademischer Betreuer] Boit. "Electro optical frequency modulation on silicon integrated circuits with 1300nm and 1064nm laser sources / Carlo Pagano. Gutachter: Christian Boit." Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1069319317/34.

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Nguyen, Giang Thach, and thach nguyen@rmit edu au. "Efficient Resonantly Enhanced Mach-Zehnder Optical Modulator on Lithium Niobate." RMIT University. Electrical and Computer Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070118.162330.

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Photonic links have been proposed to transport radio frequency (RF) signals over optical fiber. External optical modulation is commonly used in high performance RF-photonic links. The practical use of optical fiber to transport RF signals is still limited due to high RF signal loss. In order to reduce the RF signal loss, highly efficient modulators are needed. For many applications, modulators with broad bandwidths are required. However, there are applications that require only a narrow bandwidth. For these narrow-band applications, the modulation efficiency can be improved through the resonant enhancement technique at the expense of reduced bandwidth. The aim of this thesis is to investigate highly efficient Mach-Zehnder optical modulators (MZMs) on Lithium Niobate (LiNbO3) with resonant enhancement techniques for narrow-band RF-photonic applications. This work focuses in particular on analyzing the factors that affect the modulation efficiency through resonant enhancement so that the modulator electrode structure can be optimized for maximum modulation efficiency. A parameter study of the effects of the electrode characteristics on the modulation efficiency of resonantly enhanced modulators (RE-MZM) is provided. From this study, optimum design objectives are identified. Numerical optimization is employed to explore the design trade-offs so that optimal configurations can be found. A sensitivity analysis is carried out to assess the performance of optimal RE-MZMs with respect to the variations of fabrication conditions. The results of these investigations indicate that the RE-MZM with a large electrode gap is the optimal design since it provides high modulation efficiency although the inherent switching voltage is high, and is the most tolerant to the fabrication fluctuations. A highly efficient RE-MZM on X-cut LiNbO3 is practically demonstrated with the resonant enhancement factor of 5 dB when comparing to the unenhanced modulator with the same electrode structure and effective switching voltage of 2 V at 1.8 GHz. The performance of the RF-photonic link using the fabr icated RE-MZM is evaluated. Optimization of RE-MZMs for operating at millimeter-wave frequencies is also reported. Factors that limit the modulation efficiency of an RE-MZM at millimeter-wave frequencies are identified. Novel resonant structures that can overcome these limitations are proposed. Preliminary designs indicate that greatly improved modulation efficiency could be expected.
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Gutiérrez, Campo Ana María. "Development of integrated silicon photonics modulation devices for digital and analog applications." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/33330.

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Silicon photonics is one of the most exciting and fastest growing photonic technologies in recent years. The salient feature of this technology is its compatibility with the mature silicon IC manufacturing based on complementary metal-oxide semiconductor (CMOS) processes widely used in microelectronic industry. Another motivation is the availability of high-quality silicon-on-insulator (SOI) planar waveguide circuits that offer strong optical confinement due to the high index contrast between silicon (n=3.45) and SiO2 (n=1.45). This opens up miniaturization and very large scale integration of photonic devices allowing photonic integrated circuits for a wide range of applications and markets, from optical telecommunications to bio-photonic devices or precise fibre sensors. Optical modulators are key building-blocks for high speed signal transmission and information processing in any photonic interconnection solution. The work developed in this thesis, as part of the objectives of the European project HELIOS in which it is framed, is essentially focused on realizing compact and efficient modulators integrated on silicon chips. The thesis consists of three main chapters as well as the concluding section on the work accomplished. Chapter one is aimed at giving a general description of the benefits of using silicon photonics, showing its challenges and opportunities as well as at giving a deeply overview of all issues related to the electro-optic modulation. Chapter two is devoted to develop silicon modulators with high features for digital applications. Specifically, new optical structures different to the conventional ones are presented with the aim of enhancing the modulation performance or at least several critical parameters in the modulation. Chapter three is dedicated to the analog applications. The concept of microwave photonics is described as well as different researches carried out in the analog scope for application in the field of integrated microwave photonics, all of them using CMOS-compatible electro-optic silicon modulators which validate the potential of silicon photonics as a promising approach for enabling the development of integrated microwave photonics applications. Finally, conclusions on the work realized are provided in Chapter 4.
La fotónica de silicio es una de las tecnologías fotónicas que está experimentando un crecimiento más excitante y rápido en los últimos años. La característica más destacada de esta tecnología es su compatibilidad con las maduras técnicas de fabricación de circuitos integrados de silicio basadas en los procesos ¿complementary metal-oxide semiconductor¿ (CMOS) ampliamente utilizados en la industria microelectrónica. Otra motivación es la disponibilidad de circuitos de guía de ondas planas de silicio sobre aislante (SOI) de alta calidad que ofrecen un fuerte confinamiento óptico debido al alto contraste índices entre el silicio (n=3,45) y el SiO2 (n = 1,45). Esto abre las puertas a la miniaturización y a la integración a gran escala de dispositivos fotónicos lo que resulta en circuitos fotónicos integrados para una amplia gama de aplicaciones y mercados, desde telecomunicaciones ópticas a dispositivos bio-fotónicos o sensores de fibra precisos. Los moduladores ópticos son elementos básicos fundamentales para la transmisión de señales a alta velocidad y el procesado de información en cualquier solución de interconexión fotónica. El trabajo desarrollado en esta tesis, como parte del los objetivos del proyecto Europeo HELIOS en el que está enmarcada, se centra fundamentalmente en realizar moduladores compactos y eficientes, integrados en chips de silicio. La tesis consiste en 3 capítulos principales así como una sección de conclusiones del trabajo conseguido. El capítulo uno está destinado a dar una descripción general de los beneficios del uso de la fotónica de silicio, mostrando sus retos y oportunidades, así como a dar una visión profunda de todos los aspectos relacionados con la modulación electro-óptica. El capítulo dos está dedicado a desarrollar moduladores de silicio de altas prestaciones para aplicaciones digitales. Específicamente, se presentan nuevas estructuras ópticas diferentes a las convencionales con el objetivo de mejorar el rendimiento de la modulación o al menos algunos parámetros críticos en la modulación. El tercer capítulo se dedica a las aplicaciones analógicas. Se describe el concepto de la fotónica de microondas, así como diferentes investigaciones llevadas a cabo en el ámbito analógico para su aplicación en el campo de la fotónica integrada de microondas, todas ellas usando moduladores electro-ópticos de silicio compatibles con los procesos de fabricación CMOS, lo que valida el potencial de la fotónica de silicio como un prometedor enfoque para permitir el desarrollo de aplicaciones de la fotónica integrada de microondas. Por último, las conclusiones sobre el trabajo realizado se proporcionan en el Capítulo 4.
Gutiérrez Campo, AM. (2013). Development of integrated silicon photonics modulation devices for digital and analog applications [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/33330
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Giuglea, Alexandru, Guido Belfiore, Mahdi Khafaji, Ronny Henker, Despoina Petousi, Georg Winzer, Lars Zimmermann, and Frank Ellinger. "Comparison of Segmented and Traveling-Wave Electro-Optical Transmitters Based on Silicon Photonics Mach-Zehnder Modulators." Institute of Electrical and Electronics Engineers (IEEE), 2018. https://tud.qucosa.de/id/qucosa%3A35393.

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This paper presents a brief study of the two most commonly used topologies - segmented and traveling-wave - for realizing monolithically integrated electro-optical transmitters consisting of Si-photonics Mach-Zehnder modulators and their electrical drivers. To this end, two new transmitters employing high swing breakdown voltage doubler drivers were designed in the aforementioned topologies and compared with regard to their extinction ratio and DC power consumption at the data rate of 30 Gb/s. It is shown that for the targeted data rate and extinction ratio, a considerably lower power consumption can be achieved with the traveling-wave topology than with its segmented counterpart. The transmitters were realized in a 250 nm SiGe BiCMOS electronic-photonic integrated technology.
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Abelard, Clément. "Micro modulateur spatial de lumière transmissif pour modulation de phase et d’amplitude." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT092/document.

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Le LETI possède un savoir-faire permettant de réaliser des micro modulateurs spatiaux de lumière (Spatial Light Modulators, SLMs) réalisés en technologie microélectronique sur silicium, ayant des très grandes résolutions et de très petits pas de pixels. Le LETI souhaite utiliser une technologie LCD particulière (la technologie IPS) dont d’une part les performances électro-optiques dans le domaine des micro-écrans ne sont pas connues mais d’autre part permet de garder des coûts réduits et de réduire le nombre d’étapes de fabrication. L’objectif de cette thèse est d’évaluer sur la base de simulations puis de réalisations techniques, les performances d’un micro-SLM IPS utilisé en modulation de phase et d’amplitude.Les recherches effectuées au cours de cette thèse portent sur 4 axes d’études. Le premier axe consiste à la recherche et à l’essai d’un logiciel spécifique (LCDMaster) permettant de simuler des cellules à cristaux liquides ainsi que des électrodes flottantes. Le second axe consiste à étudier en fonction du design du pixel et des différents modes d’alignements des cristaux liquides (Homogène, vertical et twisté) avec un pilotage de type IPS, les performances en modulation de phase. Les meilleurs résultats sont obtenus pour un alignement vertical fournissant un déphasage de 2 Pi. De plus, les performances d’un dispositif d’optique adaptative intégrant le SLM étudié ont été investiguées. Le troisième axe d’étude, consiste avec le même logiciel à investiguer sur les performances d’un SLM à cristaux liquide avec un pilotage de type IPS utilisant un alignement homogène en modulation d’amplitude (étude statique et dynamique). Cette étude permet également d’étudier les possibilités de diminution du temps de réponse de la cellule. Cette étude a aboutie à deux designs de SLM. Le premier design avec deux niveaux d’électrodes séparés par un isolant permettant de reproduire un effet type « cage de faraday ». La seconde a permis de diminuer de manière drastique le temps de réponse. Le quatrième axe de recherche consiste à tester des prototypes basés sur ces deux designs pour vérifier les performances obtenues en simulation grâce à un banc de caractérisation électro-optique. Des résultats concordants ont étés obtenus et de nouveaux types de SLM à pilotage IPS proposant un temps de rafraichissement rapides se rapprochant de l’état de l’art ont donc pu être désignés et caractérisés
LETI possesses an expertise allowing to realize Spatial Light Modulators (SLMs) made in microelectronic technology on silicon, having very high resolutions and very small pixel steps. LETI wishes to use a specific LCD technology (IPS technology), on the one hand the electro-optical performances in the field of micro-display had to be investigated but on the other hand allows to keep costs down and reduce the number of manufacturing steps. The objective of this thesis is to evaluate on the basis of simulations and technical achievements, the performance of a micro-SLM IPS used in phase modulation and amplitude.Our investigations have been carried out on four major areas of study. The first axis is the search and testing of a specific software (LCDMaster) to simulate liquid crystal cells and floating electrodes. The second axis according to different designs of pixel and the different liquid crystal alignment modes (Homogeneous, vertical and twisted) with an IPS type control, to investigate the performances in modulation phase. The best results were obtained for a vertical alignment providing a phase shift of 2π. In addition, the performance of an adaptive optics device integrating the studied SLM has been investigated. The third axis of study focused on the performance investigation of a liquid crystal SLM with an IPS-type control using a homogeneous alignment in amplitude modulation (static and dynamic study). This study also makes it possible to study the possibilities of reducing the response time of the cell. It resulted in two SLM designs. The first design with two levels of electrodes separated by an insulator to reproduce a Faraday type effect. The second has drastically reduced the response time. The fourth area of research consists in testing prototypes based on these two designs to validate the performances obtained in simulation. Concordant results have been obtained and new types of IPS-controlled SLMs with state-of-the-art refreshing times have thus been designated and characterized
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Books on the topic "Electro-optical modulation"

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Boreman, G. D. Modulation transfer function in optical and electro-optical systems. Bellingham, Wash: SPIE Press, 2001.

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Singer, Kenneth D. "Poling of microwave electro-optic devices": Final technical report : contract # NCC3-431. [Washington, DC: National Aeronautics and Space Administration, 1997.

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Montgomery, H. E. Sensor performance analysis. Greenbelt, Md: Goddard Space Flight Center, 1990.

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Montgomery, H. E. Sensor performance analysis. Washington, D.C: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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Montgomery, H. E. Sensor performance analysis. Washington, D.C: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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Abushagur, Mustafa A. G. Development of a stable electro-optical modulator. [Washington, DC?: National Aeronautics and Space Administration, 1992.

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Boreman, Glenn D. Modulation Transfer Function in Optical and Electro-Optical Systems. SPIE, 2001. http://dx.doi.org/10.1117/3.419857.

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Boreman, Glenn D. Modulation Transfer Function in Optical and Electro-Optical Systems, Second Edition. SPIE, 2021. http://dx.doi.org/10.1117/3.2581373.

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Development of a stable electro-optical modulator. Huntsville, Ala: Dept. of Electrical and Computer Engineering, University of Alabama in Huntsville, 1991.

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Design and Experimental Evaluation of an Electro-Optical, Sigma-Delta Modulator for Wideband Digital Antennas. Storming Media, 2000.

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Book chapters on the topic "Electro-optical modulation"

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Blau, G., L. Ruiz, P. Casablancas, G. Vitrant, P. A. Chollet, and F. Kajzar. "Electro-Optical Modulation in Organic Waveguides Using Grating Couplers." In Photoactive Organic Materials, 275–80. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-017-2622-1_18.

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Bak, J., R. Ishikawa, and K. Mizuno. "Modulation of an Electron Beam in Optical Near-Fields." In Progress in Nano-Electro-Optics I, 29–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-46023-7_2.

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Thomas, Philip A. "Nanomechanical Electro-Optical Modulator Based on Atomic Heterostructures." In Narrow Plasmon Resonances in Hybrid Systems, 65–82. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97526-9_5.

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Amiri, Iraj Sadegh, and Masih Ghasemi. "Optical Fibre Dispersions and Future Contributions on Electro-optic Modulator System Optimizations." In SpringerBriefs in Electrical and Computer Engineering, 67–68. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10585-3_6.

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Dalton, L. R., and A. W. Harper. "Photoactive Organic Materials for Electro-Optic Modulator and High Density Optical Memory Applications." In Photoactive Organic Materials, 183–98. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-017-2622-1_12.

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Rao, Sandro, Francesco G. Della Corte, and Caterina Summonte. "Electro-Optical Modulating Multistack Device Based on the CMOS-Compatible Technology of Amorphous Silicon." In Lecture Notes in Electrical Engineering, 285–89. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1324-6_44.

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Boreman, Glenn D. "MTF in Electro-optical Systems." In Modulation Transfer Function in Optical and Electro-Optical Systems, Second Edition. SPIE, 2021. http://dx.doi.org/10.1117/3.2581373.ch2.

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Newnham, Robert E. "Electro-optic phenomena." In Properties of Materials. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780198520757.003.0030.

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Abstract:
Optical beams can be controlled by manipulating the refractive indices and absorption coefficients with applied electric fields. In communication systems electro-optic effects are used in phase and amplitude modulation, in beam deflectors, and in tunable filters. Three such effects are illustrated in Fig. 28.1. Lead lanthanum zirconate titanate (PLZT) is a transparent electroceramic that can be prepared in several different ferroelectric forms with large electro-optic coefficients. When prepared in a normal ferroelectric form it can be used in two different ways. A light-tunable shutter is constructed by coating a multidomain ceramic of PLZT with a photoconducting layer and transparent electrodes. A bias voltage on the electrodes is transferred to the ceramic when the photoconductor is illuminated. The electric field alters the domain structure and the degree of light scattering, controlling the intensity of light. Fully poled ferroelectric ceramics exhibit the linear electro-optic effect Using planar electrodes the PLZT is poled perpendicular to the optical beam. Polarizer and analyzer are positioned in the ±45◦ positions, and light intensity is controlled by altering the birefringence with an electric field. The third experiment utilizes a pseudo-cubic PLZT composition with a large quadratic electro-optic effect. No poling is required in this case. With polarizer and analyzer again in the ±45◦ positions, the transmitted light intensity is proportional to E2 rather than E. Linear and quadratic electro-optic coefficients are defined in terms of the fieldinduced changes in the optical indicatrix: . . . Bij(E) − Bij(0) = Δ
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Boreman, Glenn D. "MTF in Optical Systems." In Modulation Transfer Function in Optical and Electro-Optical Systems, Second Edition. SPIE, 2021. http://dx.doi.org/10.1117/3.2581373.ch1.

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Boreman, Glenn D. "Noise-Target Measurement of MTF." In Modulation Transfer Function in Optical and Electro-Optical Systems, Second Edition. SPIE, 2021. http://dx.doi.org/10.1117/3.2581373.ch5.

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Conference papers on the topic "Electro-optical modulation"

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Leibel, Renata G., Luis H. Ynoquio, Jean Pierre v. d. Weid, and Patryk J. Urban. "Linearized electro-optical modulation with concurrent transmissions." In 2017 International Topical Meeting on Microwave Photonics (MWP). IEEE, 2017. http://dx.doi.org/10.1109/mwp.2017.8168658.

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Bonando, Matheus G., Sergio A. Gimenes, and Lucia A. M. Saito. "Graphene Coplanar Capacitor for Electro-Optical Modulation." In 2019 SBFoton International Optics and Photonics Conference (SBFoton IOPC). IEEE, 2019. http://dx.doi.org/10.1109/sbfoton-iopc.2019.8910219.

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Gao, Bofeng, Mengxin Ren, Wei Wu, and Jingjun Xu. "Electro-optical Modulation in Lithium Niobate Metasurfaces." In CLEO: Applications and Technology. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/cleo_at.2021.jw1a.159.

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Alem, Nour, Fabrice Pellen, and Bernard Le Jeune. "New microwave modulation LIDAR scheme for naval mine detection." In Electro-Optical Remote Sensing, edited by Gary Kamerman and Ove Steinvall. SPIE, 2017. http://dx.doi.org/10.1117/12.2279148.

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Capmany, José, and Carlos R. Fernández-Pousa. "Quantum Blackbox Model for Electro-Optical Phase Modulation." In National Fiber Optic Engineers Conference. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/nfoec.2010.jwa59.

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Lewis, A. H., F. De Lucia, W. Belardi, C. C. Huang, J. R. Hayes, F. Poletti, D. Hewak, and P. J. A. Sazio. "Composite Material Hollow Core Optical Fiber Electro-Modulation." In Frontiers in Optics. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/fio.2018.fw6b.4.

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Yao, Xin-Cheng, and John S. George. "Rapid phase modulation for optical coherence tomography using electro-optic phase modulator." In Biomedical Topical Meeting. Washington, D.C.: OSA, 2004. http://dx.doi.org/10.1364/bio.2004.fh38.

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Watanabe, Horiuchi, Tanaka, and Suzuki. "Optical modulation characteristics of 5.8 GHz OFDM signal with electro-absorption modulator." In International Topical Meeting on Microwave Photonics MWP-02. IEEE, 2002. http://dx.doi.org/10.1109/mwp.2002.1158903.

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Gan, Xuetao, Ren-Jye Shiue, Yuanda Gao, Kin Fai Mak, Xinwen Yao, Luozhou Li, Attila Szep, et al. "Electro-optical Modulation in Graphene Integrated Photonic Crystal Nanocavities." In CLEO: Science and Innovations. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/cleo_si.2013.ctu1f.4.

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Zumkley, Stefan, Georg Wingen, Gustaaf Borghs, F. Scheffer, W. Prost, and Dieter Jaeger. "Electro-optical modulation in AlGaAs/GaAs distributed feedback structures." In The Hague '90, 12-16 April, edited by Dieter Jaeger. SPIE, 1990. http://dx.doi.org/10.1117/12.20658.

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Reports on the topic "Electro-optical modulation"

1

Kirchner, M. Characterization of an Electro-Optical Modulator for Next Linear Collider Photocathode Research. Office of Scientific and Technical Information (OSTI), September 2004. http://dx.doi.org/10.2172/833116.

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