[1] Yanagase Y, Suzuki S, Kokubun Y, et al. Box-like filter response and expansion of FSR by a vertically triple coupled microring resonator filter［J］. Journal of Lightwave Technology, 2002, 20(8): 1525-1529.
[2] Dong Xiaowei, Liu Manman, Liu Wenkai. Pulse-repetition rate multiplication based on micro-ring resonator［J］. Laser & Optoelectronics Progress, 2016, 53(4): 040602.
[3] Yan Chongyu, Gao Xunhong, Song Dongyu, et al. Characteristicanalysis of single and double micro ring resonant cavity used in Mach-Zehnder interferometer filter［J］. Acta Photonica Sinica, 2015, 44(7): 0713007.
[4] Li Minghui, Ma Kezhen, Luo Liang, et al. Influence of coupling gap on the performance of silicon-no-insulator microring resonator［J］. Chinese J Lasers, 2014, 41(6): 0610001.
[6] Choi J M, Lee R K, Yariv A. Control of critical coupling in a ring resonator fiber configuration: application to wavelength selective switching, modulation, amplification and oscillation［J］. Optics Letters, 2001, 26(11): 1236-1238.
[7] Yosef M L, Chin M K. Optical buffer with higher delay-bandwidth product in a two-ring system［J］. Optics Express, 2008, 16(3): 1796-1807.
[8] White I M, Zhu H Y, Suter J D, et al. Refractometric sensors for lab-on-achipbased on optical ring resonators［J］. IEEE Sensors Journal, 2007, 7(1): 28-35.
[9] Liu X, Kong M, Feng H. Transmission and dispersion of coupled double-ring resonators［J］. Journal of the Optical Society of America B, 2012, 29(1): 68-74.
[10] Smith D D, Chang H. Coherence phenomena in coupled optical resonators［J］. Journal of Modern Optics, 2004, 51(16/17/18): 2503-2513.
[11] Liu X, Kong M. Variations of group delay and transmittance with parameters of coupled double-ring resonators［J］. Journal of Modern Optics, 2013, 60(3): 213-219.
