Optimally gain-flattened and dispersion-managed C + L-band hybrid amplifier using a single-wavelength pump laser |
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Authors: | Shien-Kuei Liaw Liang Dou Anshi Xu Yu-Sheng Huang |
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Affiliation: | aDepartment of Electronic Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan;bState Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China |
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Abstract: | We propose a hybrid C-band erbium-doped fiber amplifier (EDFA) and L-band Raman fiber amplifier (RFA) using a single pump laser diode. The optimum pump sharing ratio to EDFA/RFA is 1/10 with a total pump power of 660 mW. Using multiple fiber Bragg gratings (FBGs) with various reflectivities at different positions along the dispersion compensation fiber, the optimum dispersion compensation and power equalization for C + L-band channels are simultaneously realized. With an input power of −20 dBm/ch, the signal power variation among the channels is reduced from 9.8 dB to less than ±0.5 dB. Two pump reflectors are introduced to increase the pumping efficiency. |
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Keywords: | Hybrid fiber amplifier Fiber Bragg gratings Dispersion compensation Power equalization Pumping efficiency |
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