提出了一种压缩系数可控的光脉冲压缩器该脉冲压缩器主体包括梳状色散分布光纤(CDPF)和喇曼放大器两部分.梳状色散分布光纤由多段色散位移光纤和单模光纤拼接而成,具有喇曼增益介质的功能对一给定的光脉冲序列,可以通过控制泵浦功率实现脉冲压缩器的压缩率可调.通过对非线性薛定锷方程的数值模拟,这一光脉冲压缩器的性能得到了验证.当光脉冲在CDPF中传输时,脉冲得到压缩并且被放大.对喇曼泵浦功率来改变可以得到不同的输出脉宽.通过优化CDPF的结构,得到了喇曼泵浦功率和压缩系数之间很好的线性关系.

A compression-factor-controllable optical pulse compressor is proposed. This compressor consists of a comb-like dispersion-profiled fiber (CDPF) and a Raman amplifier. Sections of the dispersion shifted fibers and single mode fibers are used as the CDPF and Raman gain medium. Tunable compression factor is achieved by controlling the pump power of the compressor for a given pulse train. The performance of the optical pulse compressor is demonstrated by a simulation method based on nonlinear Schrdinger equation. When propagating in the CDPF, optical pulse is compressed and amplified. The output pulse width could be tuned by controlling the power of Raman pump. A good linear relationship between the Raman pump power and the compression factor is achieved by optimizing the structure of the CDPF.