The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Rajinder Singh Kaler - One of the best experts on this subject based on the ideXlab platform.
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Novel optical flat-Gain hybrid amplifier for dense wavelength division multiplexed system
IEEE Photonics Technology Letters, 2014Co-Authors: Simranjit Singh, Rajinder Singh KalerAbstract:For the first time, a novel flat-Gain optical amplifier is proposed using a hybrid configuration with an Er-Yb co-doped waveguide amplifier (EYDWA) and a semiconductor optical amplifier (SOA) for 100, × 10-Gb/s dense wavelength division multiplexed system at 0.2 nm interval. With an EYDWA-SOA hybrid amplifier, a flat Gain of > 14 dB is obtained across the effective bandwidth with a Gain Variation of the order of 0.75 dB without using any Gain clamping techniques. It is observed that when the proposed hybrid amplifier is used as a booster for hybrid distributed Raman amplifier and erbium doped fiber amplifier, the Gain Variation is reduced from 2.01 to ∼ 1.15 dB efficiently with acceptable bit error rate. © 1989-2012 IEEE.
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Multiparameter optimization of a Raman fiber amplifier using a genetic algorithm for an L-band dense wavelength division multiplexed system
Optical Engineering, 2014Co-Authors: Simranjit Singh, Sonak Saini, Gurpreet Kaur, Rajinder Singh KalerAbstract:We present a simple genetic algorithm implemented to perform multiparameter optimization of a Raman fiber amplifier for a 100-channel L-band dense wavelength division multiplexed system at a 25-GHz interval. The system is investigated for various cases with fixed pump frequency leading to 202.2-THz pump as the best choice with average Gain above 19.5 dB. There is evidence to show that a single counterpropagating pump optimized to 588.2-mW power level and optimum Raman fiber length of 38.8 km presents a small Gain Variation (
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Flat-Gain L-band raman-EDFA hybrid optical amplifier for dense wavelength division multiplexed system
IEEE Photonics Technology Letters, 2013Co-Authors: Simranjit Singh, Rajinder Singh KalerAbstract:An efficient Gain-flattened L-band optical amplifier is demonstrated using a hybrid configuration with a distributed Raman amplifier (DRA) and an erbium-doped fiber amplifier (EDFA) for 160 × 10-Gb/s dense wavelength division multiplexed system at 25-GHz interval. With an input signal power of 3 mW, a flat Gain of >; 10 dB is obtained across the frequency range from 187 to 190.975 THz with a Gain Variation of ; 8.9 dBm) ever reported for a DRA-EDFA hybrid optical amplifier at reduced channel spacing.
Sohrab Samadian - One of the best experts on this subject based on the ideXlab platform.
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A Low Phase Noise Quad-Band CMOS VCO with Minimized Gain Variation for GSM/GPRS/EDGE
2007 IEEE International Symposium on Circuits and Systems, 2007Co-Authors: Sohrab SamadianAbstract:A differential LC VCO is presented for commercial quad-band GSM/GPRS/EDGE applications. The VCO is designed in 0.13μm CMOS process and meets stringent phase noise specifications. A technique to minimize the VCO Gain Variation is presented which reduces the Kvco Variation to ±14%; more than three times smaller than the previous solutions. This technique results in reduction of the delay mismatch between the amplitude and phase paths in a polar loop transmitter.
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a low phase noise quad band cmos vco with minimized Gain Variation for gsm gprs edge
International Symposium on Circuits and Systems, 2007Co-Authors: Sohrab SamadianAbstract:A differential LC VCO is presented for commercial quad-band GSM/GPRS/EDGE applications. The VCO is designed in 0.13 mum CMOS process and meets stringent phase noise specifications. A technique to minimize the VCO Gain Variation is presented which reduces the Kvco Variation to plusmn14%; more than three times smaller than the previous solutions. This technique results in reduction of the delay mismatch between the amplitude and phase paths in a polar loop transmitter.
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ISCAS - A Low Phase Noise Quad-Band CMOS VCO with Minimized Gain Variation for GSM/GPRS/EDGE
2007 IEEE International Symposium on Circuits and Systems, 2007Co-Authors: Sohrab SamadianAbstract:A differential LC VCO is presented for commercial quad-band GSM/GPRS/EDGE applications. The VCO is designed in 0.13 mum CMOS process and meets stringent phase noise specifications. A technique to minimize the VCO Gain Variation is presented which reduces the Kvco Variation to plusmn14%; more than three times smaller than the previous solutions. This technique results in reduction of the delay mismatch between the amplitude and phase paths in a polar loop transmitter.
Simranjit Singh - One of the best experts on this subject based on the ideXlab platform.
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Novel optical flat-Gain hybrid amplifier for dense wavelength division multiplexed system
IEEE Photonics Technology Letters, 2014Co-Authors: Simranjit Singh, Rajinder Singh KalerAbstract:For the first time, a novel flat-Gain optical amplifier is proposed using a hybrid configuration with an Er-Yb co-doped waveguide amplifier (EYDWA) and a semiconductor optical amplifier (SOA) for 100, × 10-Gb/s dense wavelength division multiplexed system at 0.2 nm interval. With an EYDWA-SOA hybrid amplifier, a flat Gain of > 14 dB is obtained across the effective bandwidth with a Gain Variation of the order of 0.75 dB without using any Gain clamping techniques. It is observed that when the proposed hybrid amplifier is used as a booster for hybrid distributed Raman amplifier and erbium doped fiber amplifier, the Gain Variation is reduced from 2.01 to ∼ 1.15 dB efficiently with acceptable bit error rate. © 1989-2012 IEEE.
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Multiparameter optimization of a Raman fiber amplifier using a genetic algorithm for an L-band dense wavelength division multiplexed system
Optical Engineering, 2014Co-Authors: Simranjit Singh, Sonak Saini, Gurpreet Kaur, Rajinder Singh KalerAbstract:We present a simple genetic algorithm implemented to perform multiparameter optimization of a Raman fiber amplifier for a 100-channel L-band dense wavelength division multiplexed system at a 25-GHz interval. The system is investigated for various cases with fixed pump frequency leading to 202.2-THz pump as the best choice with average Gain above 19.5 dB. There is evidence to show that a single counterpropagating pump optimized to 588.2-mW power level and optimum Raman fiber length of 38.8 km presents a small Gain Variation (
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Flat-Gain L-band raman-EDFA hybrid optical amplifier for dense wavelength division multiplexed system
IEEE Photonics Technology Letters, 2013Co-Authors: Simranjit Singh, Rajinder Singh KalerAbstract:An efficient Gain-flattened L-band optical amplifier is demonstrated using a hybrid configuration with a distributed Raman amplifier (DRA) and an erbium-doped fiber amplifier (EDFA) for 160 × 10-Gb/s dense wavelength division multiplexed system at 25-GHz interval. With an input signal power of 3 mW, a flat Gain of >; 10 dB is obtained across the frequency range from 187 to 190.975 THz with a Gain Variation of ; 8.9 dBm) ever reported for a DRA-EDFA hybrid optical amplifier at reduced channel spacing.
Kazuhide Nakajima - One of the best experts on this subject based on the ideXlab platform.
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Gain-Clamped 4-LP-Mode Erbium-Doped Fiber Amplifier With Low Temporal Gain Variation
Journal of Lightwave Technology, 2018Co-Authors: Masaki Wada, Shinichi Aozasa, Taiji Sakamoto, Takayoshi Mori, Takashi Yamamoto, Kazuhide NakajimaAbstract:We demonstrate a ring-resonator-based Gain-clamped 4-LP-mode erbium-doped fiber amplifier (EDFA). In this study, we show that a Gain-clamped EDFA can reduce temporal modal Gain Variation simultaneously in all modes. We experimentally evaluate the transient response of a 4-LP-mode EDFA and succeed in reducing the modal Gain Variation for all modes at 1530 and 1550 nm from 4.0 to 1.1 dB and from 2.8 to 0.7 dB, respectively, by using a Gain-clamping technique.
K. Oh - One of the best experts on this subject based on the ideXlab platform.
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Temperature-Dependent Gain Variation Reduction in$C$-Band Erbium-Doped Fiber Amplifier Using Phosphorus-Erbium-Doped Silica Fiber
IEEE Photonics Technology Letters, 2006Co-Authors: Y.-e. Im, C.-s. Park, K. OhAbstract:We propose a new technique to reduce the temperature-dependent Gain (TDG) tilt of erbium-doped fiber amplifier in the C-band by supplying a composite optical Gain block, conventional aluminum-rich erbium-doped fiber (EDF) serially concatenated with a special EDF composed of phosphorus-doped silica host, which showed opposite TDG coefficients in the C-band. The TDG Variation was suppressed to less than plusmn0.45 dB for the saturated Gain of 16 dB in 1525-1565 nm, within the temperature range of -40degC to +80 degC
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Suppression of temperature-dependent Gain Variation of conventional EDFA by hybrid connection of antimony-doped silica EDF
Electronics Letters, 2003Co-Authors: Y. Im, K. Oh, D.j. Digiovanni, Baishi Wang, A. HariharanAbstract:A new technique to suppress temperature dependence of EDFA Gain is proposed and experimentally demonstrated. A specially designed EDF, the glass host of which is Sb-doped silica, showed an opposite sign of temperature dependent Gain coefficients in C-band compared to Al-doped silica EDFs. Concatenation of those two EDFs showed an improved Gain Variation less than /spl plusmn/0.37 dB for the saturated Gain over 15 dB, within -40 to +80/spl deg/C.
