Готові списки джерел за темами / Slotted lasers

Добірка наукової літератури з теми "Slotted lasers"

Автор: Grafiati

Опубліковано: 18 травня 2024

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Статті в журналах з теми "Slotted lasers"

Fordyce, J. A. M., D. A. Diaz-Thomas, L. O'Faolain, A. N. Baranov, T. Piwonski, and L. Cerutti. "Single-mode interband cascade laser with a slotted waveguide." Applied Physics Letters 121, no. 21 (November 21, 2022): 211102. http://dx.doi.org/10.1063/5.0120460.

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The design of a single-mode interband cascade laser (ICL) using a slotted waveguide is presented. This technique was explored as an inexpensive alternative to distributed feedback lasers since standard photolithography can be used in fabrication and complex techniques, such as e-beam lithography, re-growth steps, and/or metal gratings, can be avoided. The design of slotted waveguides must be carefully simulated before fabrication to ensure the efficacy of the photolithography masks with each ICL growth. Limitations and the behavior of key design parameters are discussed. Single-mode emission was achieved for certain temperature and injected current conditions, validating the operation of an Sb based slotted laser. The slotted ICLs were emitting from a single longitudinal mode at 3.5 μm and 2 mW of power per facet output at 20 °C with threshold currents around 80 mA.

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Guo, Wei-Hua, Qiaoyin Lu, Marta Nawrocka, Azat Abdullaev, James O'Callaghan, Michael Lynch, Vincent Weldon, and John F. Donegan. "Integrable Slotted Single-Mode Lasers." IEEE Photonics Technology Letters 24, no. 8 (April 2012): 634–36. http://dx.doi.org/10.1109/lpt.2012.2184745.

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Wallace, M. J., Gaurav Jain, Robert Mckenna, Frank Bello, and J. F. Donegan. "Tuning behaviour of slotted vernier widely tunable lasers." Optics Express 27, no. 12 (June 4, 2019): 17122. http://dx.doi.org/10.1364/oe.27.017122.

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Wallace, M. J., R. O’Reilly Meehan, R. Enright, F. Bello, D. McCloskey, B. Barabadi, E. N. Wang, and J. F. Donegan. "Athermal operation of multi-section slotted tunable lasers." Optics Express 25, no. 13 (June 15, 2017): 14414. http://dx.doi.org/10.1364/oe.25.014414.

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Abdullaev, Azat, Qiaoyin Lu, Wei-Hua Guo, Marta Nawrocka, Frank Bello, James O'Callaghan, and John F. Donegan. "Linewidth Characterization of Integrable Slotted Single-Mode Lasers." IEEE Photonics Technology Letters 26, no. 22 (November 15, 2014): 2225–28. http://dx.doi.org/10.1109/lpt.2014.2350772.

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Jánossy, M., P. Mezei, P. Horváth, and L. Csillag. "Pulsed noble gas mixture slotted hollow cathode lasers." Optics Communications 68, no. 1 (September 1988): 58–62. http://dx.doi.org/10.1016/0030-4018(88)90014-4.

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Perrott, Alison, Ludovic Caro, Mohamad Dernaika, and Frank Peters. "A Comparison between off and On-Chip Injection Locking in a Photonic Integrated Circuit." Photonics 6, no. 4 (October 1, 2019): 103. http://dx.doi.org/10.3390/photonics6040103.

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The mutual and injection locking characteristics of two integrated lasers are compared, both on and off-chip. In this study, two integrated single facet slotted Fabry–Pérot lasers are utilised to develop the measurement technique used to examine the different operational regimes arising from optically locking a semiconductor diode laser. The technique employed used an optical spectrum analyser (OSA), an electrical spectrum analyser (ESA) and a high speed oscilloscope (HSO). The wavelengths of the lasers are measured on the OSA and the selected optical mode for locking is identified. The region of injection locking and various other regions of dynamical behaviour between the lasers are observed on the ESA. The time trace information of the system is obtained from the HSO and performing the FFT (Fast Fourier Transform) of the time traces returns the power spectra. Using these tools, the similarities and differences between off-chip injection locking with an isolator, and on-chip mutual locking are examined.

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Shan, Siyue. "The Versatile Applications of Distributed Bragg Reflector (DBR) Lasers: Sensing, Communication, And Beyond." Highlights in Science, Engineering and Technology 81 (January 26, 2024): 444–48. http://dx.doi.org/10.54097/tf7y5v82.

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Distributed Bragg Reflector (DBR) lasers have emerged as versatile and indispensable tools across various domains. Their advantages, including high signal-to-noise ratios, narrow linewidths, and support for distributed sensing, enable them to excel in diverse applications. DBR lasers have revolutionized optical fiber communication, medical diagnostics, and chaos-based key distribution. They provide precise control over wavelengths, making them valuable in fields such as dermatology, ophthalmology, and photodynamic therapy. Additionally, they play a critical role in flow cytometry, spectroscopy, and dental procedures. In the realm of sensing, DBR lasers have proven their efficacy in detecting parameters like temperature, pressure, current, magnetic fields, and ultrasound. Innovative techniques, such as FPGA-based demodulation and slotted DBR optical fiber lasers, have further enhanced their capabilities. As technology advances, the potential of DBR lasers in sensing and detection applications continues to grow. Their ability to deliver real-time, accurate data across various parameters positions them as essential tools for addressing complex scientific, medical, and industrial challenges. The future promises exciting developments in DBR laser technology, further expanding their role in solving multifaceted problems.

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Roy, Aritra, Saroj K. Patra, and Tomasz Piwonski. "Tunable Semiconductor Slotted Lasers for Near-Infrared Optical Coherence Tomography." IEEE Photonics Technology Letters 33, no. 16 (August 15, 2021): 896–99. http://dx.doi.org/10.1109/lpt.2021.3098418.

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Qiaoyin Lu, Wei-Hua Guo, Diarmuid Byrne, and John F. Donegan. "Design of Slotted Single-Mode Lasers Suitable for Photonic Integration." IEEE Photonics Technology Letters 22, no. 11 (June 2010): 787–89. http://dx.doi.org/10.1109/lpt.2010.2045888.

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Більше джерел

Дисертації з теми "Slotted lasers"

Fordyce, Jordan. "Single-mode interband cascade lasers for petrochemical process monitoring." Electronic Thesis or Diss., Université de Montpellier (2022-....), 2023. http://www.theses.fr/2023UMONS070.

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Les lasers à cascade interbandes (ICL) fournissent des sources pour la gamme spectrale du moyen infrarouge compris entre 3 et 6 µm particulièrement efficaces en termes de consommation d’énergie. Cette gamme spectrale est particulièrement intéressante pour la détection des gaz impliqués dans l’industrie pétrochimique, car des gaz tels que le méthane, l'éthane et le dioxyde de carbone présentent une forte absorption dans cette gamme de longueur d’onde. L'identification correcte d'un gaz présent dans un échantillon nécessite des lasers avec une émission monomode et une certaine accordabilité en longueur d’onde. L'amélioration de cette plage de réglage possible avec une source laser offre de nouvelles opportunités dans des applications liées à la spectroscopie. Une alternative à ce qui est actuellement disponible dans le commerce peut être réalisée grâce à l'utilisation de guides d'ondes à fente, qui peuvent être fabriqués en utilisant de la photolithographie conventionnelle, réduisant ainsi le coût de fabrication.Deux nouveaux types d'ICL ont été conçus, fabriqués, et étudiés dans le cadre de cette thèse : un ICL à fentes à section unique et un ICL à fentes multiples accordé par Vernier (SVT). Une étude approfondie des étapes de fabrication et en particulier de la gravure sèche a été réalisée pour obtenir une gravure verticale des matériaux constituants les ICLs. Les premiers ICLs à fentes ont été fabriqués démontrant un e une émission monomode en régime continu à température ambiante avec une émission proche de 3.4 µm. Sur cette base, l'ICL SVT a été fabriqué pour étendre la plage d'accord et démontrer que l'accord par effet Vernier pouvait être mis en œuvre sur ce système de matériaux
Interband cascade lasers (ICLs) provide sources for the mid-infrared spectral range between 3 – 6 µm with low power consumption and efficient performance. This spectral range is of particular interest to the detection of gases involved with petrochemical processing, such as methane, ethane, and carbon dioxide due to their strong absorption in this range. Correct identification of a gas present in a sample requires single-mode emission and some tuning to match the absorption line, depending on the environmental conditions. Increasing the tuning range possible with one laser source opens up new possibilities in spectroscopic applications. An economical design alternative to what is currently commercially available can be realized through the use of slotted waveguides, which can be fabricated using photolithography, reducing the cost of fabrication.Two new types of ICLs have been designed, fabricated, and studied in this thesis: a single-section slotted ICL and a multi-section slotted Vernier tuned (SVT) ICL. An extensive study of the fabrication step and in particular dry etching was carried out to achieve vertical etching of the materials constituting the ICLs. First, the slotted ICLs were fabricated demonstrating single-mode emission in continuous wave operation at room temperature with emission close to 3.4 µm. Building from this foundation, the SVT ICL was fabricated to extend the tuning range and demonstrate that Vernier tuning could be implemented on this material system

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Yue, Liyang. "Laser cleaning of slotted components." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/laser-cleaning-of-slotted-components(c66c7114-d1d7-40be-a2c9-b99329435a43).html.

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Laser cleaning is a non contact, highly controllable process for the removal of contaminants from a surface with minimum or no damage to the substrate material. Laser cleaning has been applied mainly on flat and curved surfaces. Little is known on the phenomena and feasibility of laser cleaning of slotted structures. Slots are common structures in engineering, and can be found in many components. In this PhD work, the feasibility of laser cleaning of alpha case on flat titanium alloy surfaces was initially explored, and then an investigation was made on the use of a pulsed laser for the cleaning of micro to macro slots in silicon and metallic materials. The effects of laser processing parameters on the contaminant removal from these slots were experimentally studied. Laser cleaning thresholds and cleanliness was examined. Meanwhile, finite element modelling (FEM) and time domain finite difference modelling techniques were used to simulate the processes involved to aid the understanding of the technique for process optimisation. The experiments were undertaken to verify if such models are able to accurately predict the cleaning thresholds. The surface and sub-surface characteristics before and after laser cleaning were examined using optical microscopy and scanning electron microscopy (SEM). It has been shown that the slot structure and its material properties were not damaged or changed by laser cleaning process. A novel contribution is that surface morphology after the laser ablation could be used as a diagnostic method to indentify the presence of alpha case and measure its thickness due to the specific characteristics of the surface roughness and generated cracks on the ablated surface after laser irradiation. Besides, it has been found that an axial beam which propagates into the narrow slots can successfully clean the tiny particles on the slot sidewalls whose width ranges from 3.5 mm to 13mm. These phenomena had never been reported before.

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Тези доповідей конференцій з теми "Slotted lasers"

Nawrocka, M., Q. Lu, W.-H. Guo, A. Abdullaev, F. Bello, J. O'Callaghan, and J. F. Donegan. "Widely-tunable five-section slotted lasers." In 2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC. IEEE, 2013. http://dx.doi.org/10.1109/cleoe-iqec.2013.6800764.

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Roy, Aritra, Michael Dillane, Saroj K. Patra, and Tomasz Piwonski. "Electro-optic synchronization of two tunable semiconductor slotted lasers for wider tuning range application." In Semiconductor Lasers and Laser Dynamics X, edited by Krassimir Panajotov, Marc Sciamanna, and Sven Höfling. SPIE, 2022. http://dx.doi.org/10.1117/12.2621970.

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Abdullaev, A., Q. Lu, W. H. Guo, M. Nawrocka, J. O'Callaghan, and J. F. Donegan. "Improved performance of slotted single-mode lasers." In 2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC. IEEE, 2013. http://dx.doi.org/10.1109/cleoe-iqec.2013.6800776.

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Fordyce, J. A. M., D. A. Diaz-Thomas, T. Piwonski, A. N. Baranov, L. O'Faolain, and L. Cerutti. "DFB Style Slotted Waveguide Interband Cascade Lasers." In 2022 Compound Semiconductor Week (CSW). IEEE, 2022. http://dx.doi.org/10.1109/csw55288.2022.9930442.

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Lu, Qiaoyin, Wei-Hua Guo, Marta Nawrocka, Azat Abdullaev, Michael Lynch, Vincent Weldon, and John Donegan. "Slotted single-mode lasers for monolithic photonic integration." In European Conference and Exposition on Optical Communications. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/ecoc.2011.we.10.p1.22.

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Ramaswamy, P., B. Roycroft, J. OCallaghan, C. L. Janer, F. H. Peters, and B. Corbett. "Wavelength Agile Slotted Fabry-Pérot Lasers." In 2014 International Semiconductor Laser Conference (ISLC). IEEE, 2014. http://dx.doi.org/10.1109/islc.2014.184.

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Yue, Yang, Lin Zhang, Raymond G. Beausoleil, and Alan E. Willner. "Very Short Polarization Splitting/Combining using Two Horizontally-Slotted Waveguides." In Conference on Lasers and Electro-Optics. Washington, D.C.: OSA, 2009. http://dx.doi.org/10.1364/cleo.2009.ctuc4.

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Dillane, Michael, Aritra Roy, and Tomasz Piwonski. "Widely tunable single mode emission despite the small free spectral range of a long multisection slotted laser operating near 850 nm." In Semiconductor Lasers and Laser Dynamics X, edited by Krassimir Panajotov, Marc Sciamanna, and Sven Höfling. SPIE, 2022. http://dx.doi.org/10.1117/12.2622150.

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Smyth, Frank, Kai Shi, Prince M. Anandarajah, Brendan Roycroft, Brian Corbett, Frank H. Peters, and Liam P. Barry. "Tunable Slotted Fabry-Pérot Lasers for Agile Optical Networks." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/ofc.2011.othp6.

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Al-Mashaabi, Fahad S., and Lee W. Casperson. "Direct current-excited cw CO2 metal waveguide laser." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.tuz4.

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Анотація:

A novel design for a dc-excited cw CO2 metal waveguide laser has been developed in which a slotted hollow cathode also doubles as a metal waveguide for the cavity modes. This design has been implemented in a compact structure that produces up to 1 W of cw 10.6-μm radiation. The discharge characteristics, laser gain, and laser output have been studied as functions of various discharge parameters. The advantages of the new transverse-discharge slotted hollow cathode geometry include low voltage, positive impedance, rugged design, and high optical gain. Overall efficiency is comparable with that of conventional longitudinal CO2 lasers. The output laser modes were very clean low-order Gaussian or Airy function modes.

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