环中环结构谐振腔中的耦合谐振透明特性研究

在考虑耦合器插入损耗的情况下，理论分析了环中环结构谐振腔的耦合谐振透明效应.利用迭代法推导了整个结构的透过系数和有效相移，从而得到考虑了插入损耗的该结构的色散.研究表明，整个结构的有效相移，群速度和带宽，可通过耦合器的插入损耗、环中环结构中环与环周长之间的倍数以及环的个数来控制，这在旋转传感、光学时延线、光缓存、滤波等方面的应用有重要意义. 关键词： 环中环结构 耦合谐振透明 色散 慢光

Research on CRIT property in ring-in-ring structure resonator

Considering the insertion loss of coupler, we theoretically analyzed the CRIT effect of the ring-in-ring structure resonator. In the process of the theoretical analysis, the transmission coefficient and effective phase shift were deduced using iterative approach, and then the dispersion was obtained, including the effect of the insertion loss. The analysis shows the effective phase shift, group velocity and bandwidth of the whole system can be controlled by the insertion loss, the multiples between the lengths of rings and the number of rings. The control of dispersion in ring-in-ring structure is important for applications of this structure in rotating sensor, optical delay line, optical buffer and filtering.