.Box-like spectral response of a series-coupled microring resonant filter in a parallel channel[J].Optoelectronics Letters,2006,2(1):12-14 Box-like spectral response of a series-coupled microring resonant filter in a parallel channel YAN Xin MA Chun-sheng XU Yuan-zhe WANG Xian-yin E Shu-lin ZHANG Da-ming [1]College of Electronic Science and Engineering, State Key Laboratory on Integrated Optoelectronics, Jilin University, Changchun 130012, China [2]Northeast China Institute of Electric Power Engineering, Jilin 132012, China [3]State Key Laboratory on Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130021,China Abstract:       Formulas of the transfer functions are presented for a series-coupled microring resonant filter and the filtering characteristics of this device are investigated around the central wavelength of 1.55 μm. The simulation results show that when the number of the microring is 4, the amplitude coupling ratio between the channel and the microring is 0.25, that between two microrings is 0.022, and the flat box-like spectral response can be formed. The 3-dB bandwidth is about 0.2 nm, the insertion loss is about 1.5 dB, and the minimum of non-resonant light is close to −150 dB. Supported by National 863-Projec (2001AA312160) & 973-Projec (G2000036604), the Chinese Academy of Sciences (One Hundred Talent Project) and the foundation of Changchun Institute of Optics Fine Mechanics and Physics, Chinese Academy of Sciences (c03Q14z) Hits: 3560 Download times: 167 View Full Text    Download reader