An optical 90° hybrid based on an InP 4 × 4 multimode interference (MMI) coupler is designed and fabricated for the application in a coherent receiver.It reveals that the width of multimode waveguide is the ...An optical 90° hybrid based on an InP 4 × 4 multimode interference (MMI) coupler is designed and fabricated for the application in a coherent receiver.It reveals that the width of multimode waveguide is the most critical parameter for the devices,and the multimode waveguide width can be accurately controlled within 0.1 μm in our experiments.Across the entire C-band (1527-1561 nm),the maximum imbalance of the devices is less than 0.7dB,and the common mode rejection ratios for in-phase channels and quadrature channels are better than - 24 dB.展开更多
A new planar InGaAs/InP avalanche photodiode(APD)is proposed and fabricated,which incorporates a high reflective AlGaInAs/InP distributed Bragg reflector(DBR)to improve its responsivity.The fabricated APD exhibits a l...A new planar InGaAs/InP avalanche photodiode(APD)is proposed and fabricated,which incorporates a high reflective AlGaInAs/InP distributed Bragg reflector(DBR)to improve its responsivity.The fabricated APD exhibits a low dark current of less than 3 nA at M=10 and high responsivity of 0.92 A/W at M=1.The gain bandwidth product of the device is above 80 GHz.The APD receiver exhibits a sensitivity of over-26 dBm at BER=10^-(12),which is sufficient for 10 Gb/s communication systems.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 61076042the Special Project on Development of National Key Scientific Instruments and Equipment of China under Grant No 2011YQ16000205+3 种基金the National Key Technology R&D Program of China under Grant No 2009BAH49B01the National High Technology Research and Development Program(863 Program)of China under Grant Nos 2011AA03A106 and 2011AA010304,Science and Technology Special Project in Hubei Province(No 2009AAA009)the Natural Science Foundation of Hubei Province(No 2010CDB01606)the Research Funds for the Central Universities(HUST No 2011QN036).
文摘An optical 90° hybrid based on an InP 4 × 4 multimode interference (MMI) coupler is designed and fabricated for the application in a coherent receiver.It reveals that the width of multimode waveguide is the most critical parameter for the devices,and the multimode waveguide width can be accurately controlled within 0.1 μm in our experiments.Across the entire C-band (1527-1561 nm),the maximum imbalance of the devices is less than 0.7dB,and the common mode rejection ratios for in-phase channels and quadrature channels are better than - 24 dB.
基金Supported by the High-Technology Research and Development Program of China under Grant No 2006AA03Z421.
文摘A new planar InGaAs/InP avalanche photodiode(APD)is proposed and fabricated,which incorporates a high reflective AlGaInAs/InP distributed Bragg reflector(DBR)to improve its responsivity.The fabricated APD exhibits a low dark current of less than 3 nA at M=10 and high responsivity of 0.92 A/W at M=1.The gain bandwidth product of the device is above 80 GHz.The APD receiver exhibits a sensitivity of over-26 dBm at BER=10^-(12),which is sufficient for 10 Gb/s communication systems.
