光纤中基于拉曼放大与脉冲压缩的超短光孤子产生

提出一种在单模光纤负群速色散枢由弱脉冲产生高强度超短光孤子的新方法。

Ultrashort Soliton Generation Based on Raman Amplification and Pulse Compression in Optical Fibers

A novel method that can lead to generation of intense ultrashort optical solitons from weak pulses in the anomalous dispersion regime of single mode fibers is proposed. It consists of copropagating a weak pulse with an intense pump pulse in an optical fiber whose minimum dispersion wavelength is chosen such that it falls between the pump and the signal wavelength. The interplay between Raman amplification and pulse compression induces the week pulse to evolve into several fundamental solitons whose widths are much narrower than those of pump pulse and initial signal pulse. Numerical simulations show that, the higher the pump power is, the narrower and more intense the generated soliton is, and a shorter fiber is used. It is also shown that the method remains applicable even for different initial widths and for a small walk off between the pump and the signal pulses. Finally, the mechanism for fundamental soliton generation and its application in optical soliton communication system are discussed.