The Experts below are selected from a list of 83889 Experts worldwide ranked by ideXlab platform
Connie J Changhasnain - One of the best experts on this subject based on the ideXlab platform.
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modulation of a vertical cavity surface emitting laser using an intracavity quantum well absorber
IEEE Photonics Technology Letters, 1998Co-Authors: S F Lim, W. Yuen, Janice Hudgings, L P Chen, K Y Lau, Connie J ChanghasnainAbstract:We demonstrate a novel modulation technique with a vertical cavity surface-emitting laser (VCSEL) using an intracavity embedded voltage-biased quantum well absorber. We achieved a -3-dB small-Signal Bandwidth of 9 GHz and a response of 7 GHz//spl radic/(mA) by modulation of the absorber. Our calculations show that this technique introduces significantly less chirp at higher frequencies than direct current modulation.
K A Shore - One of the best experts on this subject based on the ideXlab platform.
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enhancement of chaotic Signal Bandwidth in vertical cavity surface emitting lasers with optical injection
Journal of The Optical Society of America B-optical Physics, 2012Co-Authors: Yanhua Hong, P S Spencer, K A ShoreAbstract:The Bandwidth of chaotic Signal in vertical-cavity surface-emitting lasers with optical injection has been studied experimentally. The results show that the Bandwidth of chaotic Signal, which is dependent on the frequency detuning and injection strength, can be enhanced by a factor of more than two with appropriate optical injection. Under certain conditions, optical injection can also result in a reduction of the chaotic Signal Bandwidth.
E Sanchezsinencio - One of the best experts on this subject based on the ideXlab platform.
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a continuous time sigma delta modulator with 88 db dynamic range and 1 1 mhz Signal Bandwidth
IEEE Journal of Solid-state Circuits, 2004Co-Authors: Shouli Yan, E SanchezsinencioAbstract:This paper presents the design and experimental results of a continuous-time /spl Sigma//spl Delta/ modulator for ADSL applications. Multibit nonreturn-to-zero (NRZ) DAC pulse shaping is used to reduce clock jitter sensitivity. The nonzero excess loop delay problem in conventional continuous-time /spl Sigma//spl Delta/ modulators is solved by our proposed architecture. A prototype third-order continuous-time /spl Sigma//spl Delta/ modulator with 5-bit internal quantization was realized in a 0.5-/spl mu/m double-poly triple-metal CMOS technology, with a chip area of 2.4 /spl times/ 2.4 mm/sup 2/. Experimental results show that the modulator achieves 88-dB dynamic range, 84-dB SNR, and 83-dB SNDR over a 1.1-MHz Signal Bandwidth with an oversampling ratio of 16, while dissipating 62 mW from a 3.3-V supply.
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a continuous time spl sigma spl delta modulator with 88db dynamic range and 1 1mhz Signal Bandwidth
International Solid-State Circuits Conference, 2003Co-Authors: Shouli Yan, E SanchezsinencioAbstract:A baseband continuous-time multi-bit /spl Sigma//spl Delta/ modulator achieves 88dB dynamic range over a 1.1MHz Signal Bandwidth consuming 62mW from a 3.3V supply. Excess loop delay encountered in conventional continuous-time modulators is eliminated by the proposed architecture. Clock-jitter sensitivity is considerably reduced compared with prior designs.
S F Lim - One of the best experts on this subject based on the ideXlab platform.
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modulation of a vertical cavity surface emitting laser using an intracavity quantum well absorber
IEEE Photonics Technology Letters, 1998Co-Authors: S F Lim, W. Yuen, Janice Hudgings, L P Chen, K Y Lau, Connie J ChanghasnainAbstract:We demonstrate a novel modulation technique with a vertical cavity surface-emitting laser (VCSEL) using an intracavity embedded voltage-biased quantum well absorber. We achieved a -3-dB small-Signal Bandwidth of 9 GHz and a response of 7 GHz//spl radic/(mA) by modulation of the absorber. Our calculations show that this technique introduces significantly less chirp at higher frequencies than direct current modulation.
Yanhua Hong - One of the best experts on this subject based on the ideXlab platform.
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enhancement of chaotic Signal Bandwidth in vertical cavity surface emitting lasers with optical injection
Journal of The Optical Society of America B-optical Physics, 2012Co-Authors: Yanhua Hong, P S Spencer, K A ShoreAbstract:The Bandwidth of chaotic Signal in vertical-cavity surface-emitting lasers with optical injection has been studied experimentally. The results show that the Bandwidth of chaotic Signal, which is dependent on the frequency detuning and injection strength, can be enhanced by a factor of more than two with appropriate optical injection. Under certain conditions, optical injection can also result in a reduction of the chaotic Signal Bandwidth.
