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针对光子晶体光纤具有高非线性和低色散斜率的优良特性,在单抽运的情况下,利用光子晶体光纤线性相位失配的不同组合来满足相位匹配条件,分别推导了抽运光在反常色散区和正常色散区时的放大器增益和带宽表达式,进行了模拟分析,并与文献中的基于色散移位光纤和高非线性光纤的参量放大器进行了比较。仿真结果表明,光子晶体光纤参量放大器具有更好的放大特性,当抽运光在零色散波长处时,单边增益带宽达到108.7 nm,峰值增益为91.4 dB;处在正常色散区时,距离抽运光77.1 nm的单边增益带宽不小于46 nm。在此基础上,讨论了色散波动对参量放大器的影响,显示光子晶体光纤具有较好的色散容忍性。
In the case of single-pumped photonic crystal fiber, different combinations of linear phase mismatch of photonic crystal fibers are used to meet the phase matching conditions. For the photonic crystal fiber, the characteristics of high nonlinearity and low dispersion slope are derived. The gain and bandwidth expressions of the amplifier at the region and the normal dispersion region are simulated and compared with those in the literature based on the dispersion shifted fiber and the high nonlinear fiber. The simulation results show that the photonic crystal fiber parametric amplifier has better amplification characteristics. When the pump light is at zero dispersion wavelength, the unilateral gain bandwidth reaches 108.7 nm and the peak gain is 91.4 dB. In the normal dispersion region, the distance pumping The unilateral gain bandwidth of 77.1 nm is not less than 46 nm. On this basis, the influence of dispersion fluctuation on the parametric amplifier is discussed, which shows that the photonic crystal fiber has better dispersion tolerance.