中国激光, 2009, 36 (2): 383, 网络出版: 2009-02-23
全光模数转换器中基于拉曼自频移的光量化
Optical Quantization in All-Optical Analogy-to-Digital Converter Based on Raman Self-Frequency Shift
物理光学 全光模数转换 光量化 拉曼自频移 光子晶体光纤 分步傅里叶方法 physical optics all-optical analog-to-digital conversion optical quantization Raman self-frequency shift photonic crystal fiber split-step Fourier method
摘要
采用分步傅里叶方法对广义薛定谔方程进行数值求解,研究了光子晶体光纤(PCF)中拉曼自频移用于全光模数转换器（ADC）中的光量化过程。计算结果表明，脉宽300 fs,中心波长1550 nm的高斯脉冲入射到长15 m的光子晶体光纤中，入射脉冲峰值功率在110～180 W之间变化时，由拉曼自频移形成的拉曼孤子的中心波长随功率近似线性变化，有60 nm的动态变化范围，可以达到3 bit的量化精度。
Abstract
In this paper, optical-quantization in all-optical analogy-to-digital converter (ADC) has been achieved based on the Raman self-frequency shift in a photonic crystal fiber (PCF) by numerically solving the generalized nonlinear Schrdiger (GNLS) equation, where the split-step Fourier method (STFM) is used. Gauss-shape pulse with pulse width of 300 fs and central wavelength of 1550 nm and the PCF with length of 15 m are used in the simulation. The simulating results show that the center wavelength of the Raman soliton varies linear with the peak power of the input pulse between 110 W and 180 W, where 60 nm dynamic shift can be obtained. In this case, 3 bit quantization accuracy can be achieved.
梁锐, 周晓军, 李和平, 刘永智, 刘永. 全光模数转换器中基于拉曼自频移的光量化[J]. 中国激光, 2009, 36(2): 383. Liang Rui, Zhou Xiaojun, Li Heping, Liu Yongzhi, Liu Yong. Optical Quantization in All-Optical Analogy-to-Digital Converter Based on Raman Self-Frequency Shift[J]. Chinese Journal of Lasers, 2009, 36(2): 383.
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