光纤参量放大器增益的偏振相关性分析

Theoretical Analysis of the Polarization-Dependent Gain for Fiber Optical Parametric Amplifiers

该文利用抽运波、信号波和闲频波耦合方程,推导出了双折射光纤中的增益表达式。仿真后的结果表明光参量放大器的增益与信号的偏振具有相关性。不同的信号频率,其增益与偏振角关系也不一样,对一个信号频率,信号偏振不是与快轴一致增益最大,就是与慢轴一致时增益最大,同时还存在某个频率的信号,其增益与信号的偏振具有无关性。

By use of the coupled equations of pumps, signal and idler field, we have derived the gain expression of fiber optical parametric amplifier with birefringent effect and loss. The simulation shows that the optical parametric amplifier＇ s gain is polarization - dependence. The signal gain is the best while the polarization state of signal is the same as the slow axis or the fast axis, and the gain is polarization - independence for some frequencies.