Boost up of four wave mixing signal in semiconductor optical amplifier for 40 Gb/s optical frequency conversion
Boost up of four wave mixing signal in semiconductor optical amplifier for 40 Gb/s optical frequency conversion
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DOI：
10.1016/j.optcom.2007.12.055
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发表时间：
2008-05
影响因子：
2.4
通讯作者：
Surinder Singh
中科院分区：
文献类型：
--
作者：
Surinder Singh
利用半导体光放大器（SOA）中的四波混频，成功实现了40Gb/s的不归零差分相移键控（NRZ-DPSK）信号光变频器。利用优化后的SOA结构和增强的FWM效应，对NRZ-DPSK的优化信泵比进行了评价。最佳信泵比为12dB和10dB， Q因子损失分别为0.685dB和0.663dB。研究了四波混频效率和转换信号功率对信号输入功率的依赖关系，并评价了四波混频效率随输入功率的增大而减小。在40Gb/s的情况下，泵浦功率、信号泵浦比和SOA参数对Q因子损失的影响已经给出了说明。结果表明，转换后的信号功率在达到半导体光放大器的饱和功率时先增大后减小。观察到在最佳泵浦功率下，转换信号的OSNR随信号输入功率变化不大。
The 40Gb/s optical frequency converter for non-return to zero differential phase shift keying (NRZ-DPSK) signal by using four wave mixing in semiconductor optical amplifier (SOA) have achieved sucessfully. The optimized signal-to-pump ratio for NRZ-DPSK by using optimized SOA structure with enhanced FWM effect is also evaluated. The optimum signal-to-pump ratio is 12dB and 10dB with Q factor penalty of 0.685dB and 0.663dB. The dependence of four wave mixing efficiency and converted signal power on signal input power is studied and it is evaluated that four wave mixing efficiency decreases with increase in the input power. The impact of pump power, signal-to-pump ratio, and SOA parameters with Q factor penalty for 40Gb/s has been illustrated. It has shown that converted signal power increases up to the saturation power of semiconductor optical amplifier, then decreases. It is observed that for the optimum pump power, OSNR of converted signal varies little with signal input power.