The L-band EDFA of high clamped gain and low noise figure implemented using fiber Bragg grating and double-pass method |
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Authors: | Tsair-Chun Liang Shih Hsu |
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Affiliation: | a Graduate Institute of Electro-Optical Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung, Taiwan, ROC b Department of Electronic Engineering, Cheng Shiu University, Kaohsiung, Taiwan, ROC |
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Abstract: | The L-band erbium-doped fiber amplifier (EDFA) of low noise figure and high clamped-gain using gain-clamped and double-pass configuration is presented in this paper. A total of five different configurations of EDFAs by reflection scheme with single forward pumping schemes are examined and compared here. Among these configurations, we first find the configuration of 1480-nm pumped L-band EDFA with optimum gain and noise figure value. To further minimize the gain variation, a fiber Bragg grating (FBG) with 1615-nm center wavelength and 1-nm bandwidth is determined and added in double-pass L-band EDFA. The gain variation and maximum noise figure of EDFA while channel dropping is investigated. As the number of channel dropping from 32 to 4, the L-band type-A EDFA keep the variation of gain within 2.9 dB and the maximum noise figure below 5 dB with each channel’s input power of −23 dBm. |
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Keywords: | Gain-enhanced Gain clamped Erbium-doped fiber amplifier (EDFA) Dense wavelength division multiplexing (DWDM) Fiber Bragg grating (FBG) |
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