The Experts below are selected from a list of 6750 Experts worldwide ranked by ideXlab platform
Ya Fei Wang - One of the best experts on this subject based on the ideXlab platform.
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Flat Gain Spectrum design of Raman fiber amplifiers based on particle swarm optimization and average power analysis technique
Optics and Lasers in Engineering, 2012Co-Authors: Hai Ming Jiang, Kang Xie, Ya Fei WangAbstract:Abstract In this work, the modified particle swarm optimization is used as an optimization tool to determine the set of wavelengths and power levels of pumps that delivers a flat Gain Spectrum for Raman fiber amplifiers. The average power analysis technique is used as a numerical method to solve the coupled Raman amplifier equations. By combining the modified particle swarm optimization and average power analysis technique an efficient algorithm for the design of flat-Gain-Spectrum broadband Raman fiber amplifiers is constructed. Application of this algorithm to the design of flat-Gain-Spectrum broadband Raman fiber amplifiers shows that the design efficiency of the new method is improved by 1–2 orders of magnitude compared with similar implementations previously reported in the literature. A 4-backward-pump Gain-flattened Raman amplifier with bandwidth of 100-nm and maximum Gain ripple of
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Novel Design of Flat Gain Spectrum Raman Fiber Amplifiers Based on Ant Colony Optimization
IEEE Photonics Technology Letters, 2011Co-Authors: Hai Ming Jiang, Kang Xie, Ya Fei WangAbstract:In this work, a new metaheuristic called ant colony optimization (ACO) is introduced into the design of flat-Gain-Spectrum Raman fiber amplifiers (RFAs) for the first time. In this novel design method, the pump powers and pump wavelengths are optimized by ACO to obtain a flat Gain Spectrum with a prespecified maximum Gain ripple under the given parameters of RFAs. The simulations show that the proposed method is efficient and stable. Finally, a C-band RFA with a Gain ripple of 0.32 dB is designed to demonstrate the technique in detail.
Jiangde Peng - One of the best experts on this subject based on the ideXlab platform.
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Matrix algorithms for dynamic Gain-Spectrum adjustment of backward-pumped distributed fiber Raman amplifier
Journal of Lightwave Technology, 2006Co-Authors: Wei Zhang, Li Xiao, Jiangde PengAbstract:Two matrix algorithms aiming at a dynamic Gain-Spectrum adjustment in a backward-pumped distributed fiber Raman amplifier (B-DFRA) are developed based on the relation between changes in the pump power and the Gain Spectrum. Characteristic channels are chosen to reduce the dimension of matrices in the algorithm, which can be implemented by built-in microprocessors or DSP chips inside the B-DFRA module. Furthermore, as shown by the theoretical analysis and the numerical simulation, elements in the matrices can be directly and easily measured in deployed fiber plants without information on fiber parameters. These matrix algorithms are capable of adjusting the Gain Spectrum to fit the arbitrary profile desired in reality, while a wide dynamic range can be achieved by a multistage adjustment using matrices measured under several Gain levels
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a simple algorithm for Gain Spectrum adjustment of backward pumped distributed fiber raman amplifiers
IEEE Photonics Technology Letters, 2004Co-Authors: Wei Zhang, Jiangde Peng, Xue Feng, Xiaoming LiuAbstract:In this letter, a simple algorithm for the Gain Spectrum adjustment of backward-pumped distributed fiber Raman amplifier (B-DFRA) is demonstrated both theoretically and experimentally. It is shown that the change in pump power and corresponding change in Gain Spectrum are approximately related through a linear matrix, while the elements of the matrix can be easily measured. Feasibility of this algorithm is approved by experiment: a Gain ripple of less than 1.2 dB across the C + L band is achieved during net Gain adjustment from -15 dB to -9 dB of a 160-channel B-DFRA by varying the launched power of four pumping LDs.
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Designing Gain Spectrum of multi-pumped Raman amplifier
LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242), 1Co-Authors: Jian Chen, Wei Zhang, Jiangde Peng, Xiaoming LiuAbstract:Multi-pumped Raman fiber amplifiers can realize a broadband Gain Spectrum. We propose some rules to select pump-power and pump-wavelength to realize an optimal Gain Spectrum. Also considered are the energy transfer between pumps and signals and the effect of Gain saturation on the Gain Spectrum.
Ph Robert - One of the best experts on this subject based on the ideXlab platform.
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brillouin Gain Spectrum characterization in single mode optical fibers
Journal of Lightwave Technology, 1997Co-Authors: Marc Nikles, Luc Thévenaz, Ph RobertAbstract:A novel method for Brillouin Gain Spectrum measurements in optical fibers is presented. It is based on the pump and probe technique with the specificity to use a single laser source together with an external modulator to generate the interacting lightwaves. The high accuracy and inherent stability of the technique makes it suitable for calibration and reference measurements. Different fibers with different refractive index profiles have been tested and characterized. The problem of the evolution of the polarization of the interacting waves is addressed in the article and a polarization insensitive determination of the actual Brillouin Gain coefficient is made possible through two successive measurements with different polarizations. The effects of strain and temperature on the Brillouin Gain Spectrum are also fully characterized.
Wei Zhang - One of the best experts on this subject based on the ideXlab platform.
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Matrix algorithms for dynamic Gain-Spectrum adjustment of backward-pumped distributed fiber Raman amplifier
Journal of Lightwave Technology, 2006Co-Authors: Wei Zhang, Li Xiao, Jiangde PengAbstract:Two matrix algorithms aiming at a dynamic Gain-Spectrum adjustment in a backward-pumped distributed fiber Raman amplifier (B-DFRA) are developed based on the relation between changes in the pump power and the Gain Spectrum. Characteristic channels are chosen to reduce the dimension of matrices in the algorithm, which can be implemented by built-in microprocessors or DSP chips inside the B-DFRA module. Furthermore, as shown by the theoretical analysis and the numerical simulation, elements in the matrices can be directly and easily measured in deployed fiber plants without information on fiber parameters. These matrix algorithms are capable of adjusting the Gain Spectrum to fit the arbitrary profile desired in reality, while a wide dynamic range can be achieved by a multistage adjustment using matrices measured under several Gain levels
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a simple algorithm for Gain Spectrum adjustment of backward pumped distributed fiber raman amplifiers
IEEE Photonics Technology Letters, 2004Co-Authors: Wei Zhang, Jiangde Peng, Xue Feng, Xiaoming LiuAbstract:In this letter, a simple algorithm for the Gain Spectrum adjustment of backward-pumped distributed fiber Raman amplifier (B-DFRA) is demonstrated both theoretically and experimentally. It is shown that the change in pump power and corresponding change in Gain Spectrum are approximately related through a linear matrix, while the elements of the matrix can be easily measured. Feasibility of this algorithm is approved by experiment: a Gain ripple of less than 1.2 dB across the C + L band is achieved during net Gain adjustment from -15 dB to -9 dB of a 160-channel B-DFRA by varying the launched power of four pumping LDs.
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Designing Gain Spectrum of multi-pumped Raman amplifier
LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242), 1Co-Authors: Jian Chen, Wei Zhang, Jiangde Peng, Xiaoming LiuAbstract:Multi-pumped Raman fiber amplifiers can realize a broadband Gain Spectrum. We propose some rules to select pump-power and pump-wavelength to realize an optimal Gain Spectrum. Also considered are the energy transfer between pumps and signals and the effect of Gain saturation on the Gain Spectrum.
Xiaoming Liu - One of the best experts on this subject based on the ideXlab platform.
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a simple algorithm for Gain Spectrum adjustment of backward pumped distributed fiber raman amplifiers
IEEE Photonics Technology Letters, 2004Co-Authors: Wei Zhang, Jiangde Peng, Xue Feng, Xiaoming LiuAbstract:In this letter, a simple algorithm for the Gain Spectrum adjustment of backward-pumped distributed fiber Raman amplifier (B-DFRA) is demonstrated both theoretically and experimentally. It is shown that the change in pump power and corresponding change in Gain Spectrum are approximately related through a linear matrix, while the elements of the matrix can be easily measured. Feasibility of this algorithm is approved by experiment: a Gain ripple of less than 1.2 dB across the C + L band is achieved during net Gain adjustment from -15 dB to -9 dB of a 160-channel B-DFRA by varying the launched power of four pumping LDs.
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Designing Gain Spectrum of multi-pumped Raman amplifier
LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242), 1Co-Authors: Jian Chen, Wei Zhang, Jiangde Peng, Xiaoming LiuAbstract:Multi-pumped Raman fiber amplifiers can realize a broadband Gain Spectrum. We propose some rules to select pump-power and pump-wavelength to realize an optimal Gain Spectrum. Also considered are the energy transfer between pumps and signals and the effect of Gain saturation on the Gain Spectrum.
