光纤中的参量放大和四波混频过程

Optical parametric amplifying and four wave mixing process in optical fiber

分析了光纤中零色散附近的简并四波混频（ＦＷＭ）和简并光参量放大（ＯＰＡ）过程。在简并参量放大过程中，参量增益带宽可以达到３５ｎｍ。简并四波混频对密集信道的影响在零色散点并不是最强的，而是稍微偏离零点，约１０－３ｐｓ／ｎｍ·ｋｍ。

The degenerate four wave mixing (FWM) and optical parametric amplifying (OPA) processes near the zero dispersion in optical fiber are analyzed. The gain bandwidth in OPA is about 35 nm. There is a dispersion threshold D th in FWM which is not critically zero, but slightly positive about 10 -3 ps/nm·km.