三镜级联结构Gires-Tournois谐振腔的色散特性分析

系统分析了三镜级联结构G-T谐振腔的色散特性,表明三镜级联结构G-T谐振腔具有不同于两镜级联结构G-T谐振腔的特有色散特性.利用该特性以三镜级联结构G-T谐振腔作为色散补偿元件可有效改善MGTI型interleaver的色散性能,并给出了以三镜级联结构G-T谐振腔为补偿元件的具体补偿实例.模拟结果表明：对50 GHz的MGTI型光交错复用器,可实现中心波长附近±0.08 nm、±0.09 nm和±0.1 nm范围内的色散绝对值分别小于1 ps/nm、2.4 ps/nm和6.6 ps/nm的良好的补偿结果.与文献报道的两镜级联结构G-T腔补偿结果相比,色散绝对值小于1 ps/nm的波长范围扩大了60%；在中心波长附近±0.09 nm范围内的色散绝对值降低了92%.

Study on Chromatic Dispersion of Three-Mirror Gires-Tournois Resonators

Chromatic dispersion properties are investigated for three-mirror Gires-Tournois resonators.The dispersion properties peculiar to the three-mirror Gires-Tournois resonator are demonstrated.The idea which the dispersion of MGTI interleaver can effectively improved with three-mirror Gires-Tournois compensator is pointed out and a compensation example with three-mirror Gires-Tournois resonator as compensator is given.The numerical simulation results indicate that for a 50 GHz MGTI interleaver,the chromatic dispersion can be respectively within ±1 ps/nm,±2.4 ps/nm and ±6.6 ps/nm in the range of ±0.08 nm,±0.09 nm and ±0.1 nm center-wavelength.Compared with the result of a two-mirror Gires-Tournois resonator,the compensation range with dispersion within ±1 ps/nm is broaden 60% and the absolute value of dispersion in the range of ±0.09 nm center-wavelength is reduced 92%.