Phase sensitive amplifier for PSK signals based on non-degenerate four-wave-mixing in the optical fiber |
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| Authors: | Zhiyu Chen Lianshan Yan Wei Pan Bin Luo Anlin Yi Jia Ye Hengyun Jiang Yinghui Guo |
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| Institution: | 1. Dept. Chem. Eng., I-Shou University, Kaohsiung City 840, Taiwan, ROC\n;2. Shiny Chem. Ind. Co., Yeong An Industrial Zone, Kaohsiung, Taiwan, ROC\n;3. Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan, ROC |
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| Abstract: | A phase-sensitive-amplifier (PSA) using only one pump channel based on frequency non-degenerate four-wave-mixing (FWM) process for phase-shift-keying (PSK) signals is proposed and demonstrated. Theoretical analyses are given first. By optimizing power levels of three channels and parameters of the highly nonlinear fiber (HNLF), the PSA is able to restore the signal fidelity (down to a BER of 10? 9) as the input signal shows an error-floor with the BER of 10? 6. Moreover, the PSA for the multi-level PSK signals could be achieved by adjusting the phase relationship between two input signals. |
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