[2] P. P. Absil, S. T. Chu, D. Gill et al.. Very high order integrated optical filters[C]. OFC 2004. TuL3: 37～39
[4] Shuichi Suzuki, Yasuo Kokubun, Masataka Nakazawa et al.. Ultrashort optical pulse transmission characteristics of vertically coupled microring resonator add/drop filter[J]. J. Lightwave Technol., 2001, 19(2): 266～271
[5] B. E. Little, S. T. Chu, W. Pan et al.. Vertically coupled glass microring resonator channel dropping filters[J]. IEEE Photon. Technol. Lett., 1999, 11(2): 215～217
[6] C. Arnaud, P. Feron, M. Boustimi et al.. FDTD simulation of 30 μm diameter polymer micro-ring[J]. Electron. Lett., 2003, 39(17): 1249～1250
[7] B. E. Little, S. T. Chu, H. A. Haus et al.. Microring resonator channel dropping filters[J]. J. Lightwave Technol., 1997, 15(6): 998～1005
[8] R. Orta, P. Savi, R. Tascone et al.. Synthesis of multiple-ring resonator filters for optical systems[J]. IEEE Photon. Technol. Lett., 1995, 7(12): 1447～1449
[10] Christopher J. Kaalund, Gang-Ding Peng et al.. Pole-zero diagram approach to the design of ring resonator-based filters for photonic applications[J]. J. Lightwave Technol., 2004, 22(6): 1548～1559
[11] Jianyi Yang, Qingjun Zhou, Feng Zhao et al.. Characteristics of optical bandpass filters employing series-cascaded double-ring resonators[J]. Opt. Commun., 2003, 228(1～3): 91～98
