宽带色散补偿光子晶体光纤的设计与优化

Design of photonic crystal fiber for broadband dispersion compensation

提出了一种新型的宽带色散补偿光子晶体光纤。通过增大光子晶体光纤(PCF)包层第一环空气孔半径r1,同时优化孔间距和包层其它环空气孔,在1550nm波长处获得了低至-1906.4ps/nm/km的负色散值。针对常规单模光纤的色散特性,设计出了宽带色散补偿光子晶体光纤,可补偿23倍长度的常规光纤,补偿的带宽达330nm,这在WDM系统中对多个信道同时进行色散补偿具有非常重要的意义。

A novel photonic crystal fiber （PCF） is designed for broadband dispersion compensation. By increasing the size of the first ring air holes and tailoring other structural parameters, the PCF achieves a negative dispersion of - 1906.4ps/nm/ km at 1550nm. Furthermore, according to the dispersion property of the conventional fiber, the broadband dispersion compen- sation PCF is designed and the large normal dispersion is up to - 398. 9296ps/nm/km, which means it can compensate 23 times of length of conventional single-mode fiber within ± 0.2ps/nm/km over 330nm wavelength range. The PCF is a promising component for dispersion compensation in WDM system.