用于多信道色散补偿的复合腔G-T干涉仪设计

Design of a Dual-cavity Gires-Tournois Interferometer for Multi-channel Chromatic Dispersion

给出复合腔 Gires- Tournois(G- T)干涉仪的结构 ,并分析这种结构元件的色散特性。通过分析得出 :复合腔 G- T干涉仪在保持单级 G- T干涉仪周期特性的基础上 ,增加了 G- T干涉仪的色散量 ,可用于多信道色散补偿。由于光信号在腔内多往返一次 ,色散量就会增加一定数值 。

The complex structure demonstrated here was a two-stage G-T interferometers, which not only has the same periodical nature as single-stage G-T interference, but also improves dispersion capacity by limiting light reflected inside the cavity. This structure was used for multi-channel dispersion compensation simultaneously, especially for tunable dispersion compensation. According to the calculation, one more reflection between these G-T cavities could increase dispersion capacity of complex C-T interferometer by a certain amount. Due to this principle, dispersion tunability could be realized by controlling the reflection time between complex cavities. Although the dispersion properties of such devices will be degraded by a couple of factors, such as unconformity of cavity length and unparallel of the G-T cavities, the structure of dual-cavity G-T interferometer could be finely designed for multi-channel dispersion compensation.