A novel double coupling planar structure(a single microstrip line coupled with two resonators coincidental)is presented for the first time.Based on this structure,a six-pole parallel-coupled high-temperature supercond...A novel double coupling planar structure(a single microstrip line coupled with two resonators coincidental)is presented for the first time.Based on this structure,a six-pole parallel-coupled high-temperature superconducting bandpass filter with both linear phase response and quasi-elliptic function response is designed.The filter has a 40 MHz passband with a center frequency of 2,000 MHz.Its dimension is18.67 mm 9 25.96 mm.At 77 K,minimum insertion loss is0.26 dB in passband.The group delay variation is\3 ns over70%of the filter bandwidth.展开更多
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
文摘A novel double coupling planar structure(a single microstrip line coupled with two resonators coincidental)is presented for the first time.Based on this structure,a six-pole parallel-coupled high-temperature superconducting bandpass filter with both linear phase response and quasi-elliptic function response is designed.The filter has a 40 MHz passband with a center frequency of 2,000 MHz.Its dimension is18.67 mm 9 25.96 mm.At 77 K,minimum insertion loss is0.26 dB in passband.The group delay variation is\3 ns over70%of the filter bandwidth.
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.
