The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform
M.f. Krol - One of the best experts on this subject based on the ideXlab platform.
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Transient Gain Control in EDFA's by dual-cavity optical Automatic Gain Control
IEEE Photonics Technology Letters, 1999Co-Authors: Yongqian Liu, M.f. KrolAbstract:We report a novel method for Automatic Gain Control of optical amplifiers: dual-cavity optical Automatic Gain Control. The method exploits inhomogeneous broadening in erbium-doped fibers to clamp the erbium Gain spectrum with two oscillating lasers. The technique significantly reduces surviving channel steady-state and transient power excursions by Automatic reduction of relaxation oscillations and spectral hole burning.
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Dual cavity optical Automatic Gain Control for EDFAs
OFC IOOC . Technical Digest. Optical Fiber Communication Conference 1999 and the International Conference on Integrated Optics and Optical Fiber Commu, 1Co-Authors: M.f. Krol, Yongqian Liu, J.j. Watkins, D.w. LambertAbstract:We believe we report the first demonstration of dual-cavity optical Automatic Gain Control (OAGC). The dual-cavity technique results in improved stability of the amplifier Gain spectrum under pump and signal power variations as compared to conventional OAGC.
David W. Paul - One of the best experts on this subject based on the ideXlab platform.
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An electronic oscillator with Automatic Gain Control: EQCM applications
Sensors and Actuators B: Chemical, 1996Co-Authors: Cheryl Chagnard, Patty Gilbert, A. Neal Watkins, Theodore Beeler, David W. PaulAbstract:An electronic oscillator for use with thickness-shear-mode acoustic wave sensors is described. The oscillator monitors not only the resonance frequency of the sensor, but also provides an Automatic Gain Control signal that monitors the energy dissipated by the sensor. Electrochemical quartz-crystal microbalance (EQCM) experiments have been performed in which one of the sensor's electrodes serves as the working electrode in an electrochemical cell. Electrochemical deposition of Tl+ on the sensor's surface results in a frequency shift that is attributed to mass loading, while a negligible amount of energy loss from the sensor is observed. Results from the cyclic voltammetry of the K3Fe(CN)6/ K4Fe(CN)6 couple, which does not alter the mass on the sensor, indicate that the energy loss from the sensor can be directly monitored by the Automatic Gain Control voltage and is related to the microviscosity of the solution adjacent to the sensor. The addition of Automatic Gain Control to an oscillator circuit provides energy-loss information that is usually only given by impedance analyzers. The circuit is applicable to situations where remote sensing or cost are important factors.
Yongqian Liu - One of the best experts on this subject based on the ideXlab platform.
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Transient Gain Control in EDFA's by dual-cavity optical Automatic Gain Control
IEEE Photonics Technology Letters, 1999Co-Authors: Yongqian Liu, M.f. KrolAbstract:We report a novel method for Automatic Gain Control of optical amplifiers: dual-cavity optical Automatic Gain Control. The method exploits inhomogeneous broadening in erbium-doped fibers to clamp the erbium Gain spectrum with two oscillating lasers. The technique significantly reduces surviving channel steady-state and transient power excursions by Automatic reduction of relaxation oscillations and spectral hole burning.
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Dual cavity optical Automatic Gain Control for EDFAs
OFC IOOC . Technical Digest. Optical Fiber Communication Conference 1999 and the International Conference on Integrated Optics and Optical Fiber Commu, 1Co-Authors: M.f. Krol, Yongqian Liu, J.j. Watkins, D.w. LambertAbstract:We believe we report the first demonstration of dual-cavity optical Automatic Gain Control (OAGC). The dual-cavity technique results in improved stability of the amplifier Gain spectrum under pump and signal power variations as compared to conventional OAGC.
Cheryl Chagnard - One of the best experts on this subject based on the ideXlab platform.
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An electronic oscillator with Automatic Gain Control: EQCM applications
Sensors and Actuators B: Chemical, 1996Co-Authors: Cheryl Chagnard, Patty Gilbert, A. Neal Watkins, Theodore Beeler, David W. PaulAbstract:An electronic oscillator for use with thickness-shear-mode acoustic wave sensors is described. The oscillator monitors not only the resonance frequency of the sensor, but also provides an Automatic Gain Control signal that monitors the energy dissipated by the sensor. Electrochemical quartz-crystal microbalance (EQCM) experiments have been performed in which one of the sensor's electrodes serves as the working electrode in an electrochemical cell. Electrochemical deposition of Tl+ on the sensor's surface results in a frequency shift that is attributed to mass loading, while a negligible amount of energy loss from the sensor is observed. Results from the cyclic voltammetry of the K3Fe(CN)6/ K4Fe(CN)6 couple, which does not alter the mass on the sensor, indicate that the energy loss from the sensor can be directly monitored by the Automatic Gain Control voltage and is related to the microviscosity of the solution adjacent to the sensor. The addition of Automatic Gain Control to an oscillator circuit provides energy-loss information that is usually only given by impedance analyzers. The circuit is applicable to situations where remote sensing or cost are important factors.
Tain-sou Tsay - One of the best experts on this subject based on the ideXlab platform.
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Automatic Gain Control FOR UNITY FEEDBACK Control SYSTEMS
Control and Intelligent Systems, 2009Co-Authors: Tain-sou TsayAbstract:In this paper, an Automatic Gain Control scheme is proposed for analyses and designs of unity feedback Control systems. It is consisted of a fast command tracking loop and a slow Gain adaptive loop. The overall system is equivalent to a conventional Automatic Gain Control loop with command tracking error input. It gives good command tracking behaviour while keeping robust characteristic of the original Automatic Gain Control loop. It gives good robustness for coping with fast large parameter and load disturbance variations also. The stability of the Controlled systems and effective of the proposed method are verified by root-loci, time responses, frequency responses, large parameter variations and fast large load disturbances testing with two numerical examples.
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Automatic Gain Control for unity feedback Control systems with large parameters variations
WSEAS Transactions on Systems and Control archive, 2007Co-Authors: Tain-sou TsayAbstract:In this paper, an Automatic Gain Control scheme is first proposed for analyses and designs of unity feedback Control systems. The Controlled system is a nonlinear feedback Control system. The overall system is equivalent to a conventional Automatic Gain Control loop with command tracking error input. Therefore, it gives good command tracking behaviour while keeping robust characteristic of the original AGC loop. Furthermore, it gives good robustness for coping with fast large parameter variations. The stability and effective of Controlled systems are verified by time responses, frequency responses, and parameter variation testing with three numerical examples. Comparisons are also made with the PID Control.
