基于光子晶体光纤高质量超连续谱的优化设计

Optimized design of high quality supercontinuum using photonic crystal fiber

采用分布傅里叶方法模拟了光子晶体光纤超连续谱的产生,分析了超连续谱的产生机理与不同光子晶体光纤超连续谱的特点,分析结果表明,在正常色散区可以获得高质量超连续谱。优化光子晶体光纤结构,利用脉宽为100fs、峰值功率为500W的高斯脉冲通过10m长的优化光子晶体光纤,在1 550nm波段获得了宽度为210nm、平坦度为3dB的超连续谱。

This paper simulates the generation of superocntinuum in photonic crystal fibers using the split-step Fourier method and analyzes the mechanism of its generation and its characteristics in different photonic crystal fibers.The analytical results indicate that high quality supercontinuum spectrum can be obtained in normal dispersion regions and photonic crystal fibers can be optimized by varying their structure parameters.A supercontinuum spectrum with 210 nm bandwidth,3 dB spectral flatness is obtained at 1 550 nm region by injecting the optical Gaussian pulses with 100 fs width and 500 W peak power into a 10 m long optimized photonic crystal fiber.