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对间插取样光纤光栅(ISFBG)进行了理论分析和仿真,给出了ISFBG的折射率表达式,提出了一种在较低的折射率调制深度条件下实现通道间平坦度较好的色散补偿器的制作方法.实验制作了由两个取样光纤光栅间插而成的10通道色散补偿器,其时延抖动大都小于20ps,通道间平坦度小于1dB.
The ISFBG is analyzed theoretically and simulated. The expression of the refractive index of ISFBG is given. A new method of dispersion compensation with good flatness between channels is proposed under the condition of low refractive index modulation depth The fabrication method of the device is as follows: The 10-channel dispersion compensator, which is made by interposing two sampling fiber gratings, has been manufactured experimentally, and the delay jitter is mostly less than 20ps and the interlane flatness is less than 1dB.