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 relati...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 d B,the crosstalk is negligible,and the extinction ratio(ER)is as large as 130 d B.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.展开更多
基金supported by the National Natural Science and Foundation of China(No.11474048)
文摘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 d B,the crosstalk is negligible,and the extinction ratio(ER)is as large as 130 d B.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.
