Research Of The Slow Light In The Double Coupled Ring Resonator Cavity

Right now slow light has transformed from a scientific research to a field with large application prospect. In order to achieve all-optical communication, researchers have utilized slow light technology to make corresponding implements. Compared with other methods which could generate slow light, coupled resonator cavity has smaller volume, higher integration and is less affected by environment. Thus, it gradually becomes to the main method of achieving slow light. This paper focuses on the research of slow light characteristic of double coupled ring resonator cavity.First, we deduce the transmission matrix of double coupled ring resonator cavity, analyze the slow light characteristic and discuss the inflection elements which could affect the group delay. Then, the deduction about the bandwidth limitation of the double coupled ring resonator cavity is carried out and the possibility of optical soliton in the structure is also demonstrated. In order to explain the physical essence of double coupled ring resonator cavity, we use Q value to describe the reason of achieving slow light. We analyze the EIT phenomenon of double ring coupled resonator cavity and try to explain its physical essence. For the purpose of changing the transmission function of resonator, an atom is added coupled with the resonator and the goal of altering group delay is achieved.We discuss a Zig-Zag delay line and analyze the group delay by its four passages. Through optimizing its parameters, we could control the relevant delay and achieve different amplitude output. To conquer the lack of the Zig-Zag, we propose a revised method and talk about the group delay achieved by the revised structure. Finally, we discuss the delay characteristic of all the passages.