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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.
An optical pulse compressor with controllable compressibility is proposed.The main body of the pulse compressor includes two parts: a CDFF and a Raman amplifier.The comb-like distributed optical fiber is spliced by a multi-stage dispersion-shifted fiber and a single-mode optical fiber Which has the function of Raman gain medium.For a given light pulse sequence, the compression rate of the pulse compressor can be adjusted by controlling the pump power.Through the numerical simulation of the nonlinear Schrödinger equation, this light pulse Compressor performance has been verified.When the light pulse is transmitted in the CDPF, the pulse is compressed and amplified.For the Raman pump power to change can get different output pulse width.By optimizing the structure of CDPF, Raman A good linear relationship between pump power and compression factor.