LI Jing-sen,LU Huan-yu,and ZHAO Yu-lin.N×N optical switch based on cascaded microring resonators[J].Optoelectronics Letters,2018,14(3):175-179 N×N optical switch based on cascaded microring resonators Author Name Affiliation LI Jing-sen  Chengdu Aeronautic Polytechnic, Chengdu 610110, China  LU Huan-yu  School of Astronautics & Aeronautics, University of Electronic Science and Technology of China, Chengdu 611731, China  and ZHAO Yu-lin  Chengdu Aeronautic Polytechnic, Chengdu 610110, China  Abstract:       An N×N optical switch based on cascaded microring resonators on chip is proposed. As an example, the 4×4 optical switch is further investigated. It is successfully demonstrated that its insertion loss is relatively low as 2.2 dB, the crosstalk is negligible, and the extinction ratio (ER) is as large as 130 dB. Thermal tuning is employed to make the microrings be in resonance or not, which leads to a response time of several hundred microseconds. Alternatively, doping the desired waveguide regions with p-type or n-type dopants is able to achieve a better response time of several nanoseconds. The proposed design is easily integrated to a large scale with less microring resonators, which ensures the compact size and the low power consumption. Hits: 3595 Download times: 0 View Full Text    Download reader