高速空间相干光平衡探测器结构优化
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摘要
分析了高速空间相干光平衡探测器的电路结构和噪声性能,明确了平衡探测器的关键技术参数与电路结构之间的关系。采用电阻取样型和双跨阻放大器(TIA)合成型结构设计了两种高速空间平衡光电探测器,并对其性能参数进行了实验验证。实验显示:两种高速空间相干光电探测器均可用于高速空间相干探测,且双TIA型电压合成型平衡探测器比电阻取样型平衡探测器具有更高的探测灵敏度和更好的抗噪声性能。在通信速率为5Gbps,误码率10~(-8)条件下电阻取样型平衡探测器实测最优探测灵敏度为-33.51dBm,双TIA型电压合成型平衡探测器实测最优灵敏度为-43.4dBm。对比Discovery公司通信速率为5Gbps的平衡探测器产品,双TIA型电压合成型探测灵敏度提高了近8dB。结果表明高速空间相干光电探测器的结构研究为创建高灵敏的高速空间相干光通信系统提供了理论基础。
The circuit structure and noise characteristics of a high-speed spatial coherent balanced detector were analyzed,and the dependence of key technical parameters on the circuit structure of the balanced detector was clarified.Two kinds of high-speed spatial balanced photoelectric detectors were designed by using resistance sampling and double TIA(Transimpedance Amplifier)synthesis,and their performance parameters were verified by experiments.The experiments indicate that both kinds of high-speed coherent detectors can be used for high-speed coherent detection,while the detection sensitivity and anti-noise performance from the double TIA voltage synthesis balanced detector are better than those from the resistance sampling type detector.When the communication rate is 5Gbpsand the bit error rate is 10~(-8),the optimal detection sensitivity of resistance sampling type balanced detector is -33.51 dBm,and that of the double TIA synthesis balanced detector is -43.4dBm,higher nearly 8dB than that of the Discovery's 5Gbps balanced detector.The research on the structure of high-speed spatial coherent photodetector provides a theoretical basis for the establishment of a highsensitivity and high-speed spatial coherent optical communication system.
The circuit structure and noise characteristics of a high-speed spatial coherent balanced detector were analyzed,and the dependence of key technical parameters on the circuit structure of the balanced detector was clarified.Two kinds of high-speed spatial balanced photoelectric detectors were designed by using resistance sampling and double TIA(Transimpedance Amplifier)synthesis,and their performance parameters were verified by experiments.The experiments indicate that both kinds of high-speed coherent detectors can be used for high-speed coherent detection,while the detection sensitivity and anti-noise performance from the double TIA voltage synthesis balanced detector are better than those from the resistance sampling type detector.When the communication rate is 5Gbpsand the bit error rate is 10~(-8),the optimal detection sensitivity of resistance sampling type balanced detector is -33.51 dBm,and that of the double TIA synthesis balanced detector is -43.4dBm,higher nearly 8dB than that of the Discovery's 5Gbps balanced detector.The research on the structure of high-speed spatial coherent photodetector provides a theoretical basis for the establishment of a highsensitivity and high-speed spatial coherent optical communication system.
引文
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[3]梁赫西,代永红,艾勇,等.空间光耦合平衡探测器设计与测试[J].红外与激光工程,2017,46(3):320002.LIANG H X,DAI Y H,AI Y,et al..Design and test of space optical coupling balance detector[J].Infrared and Laser Engineering,2017,46(3):320002.(in Chinese)
[4]郭力仁,胡以华,李政,等.本振功率对目标微动激光平衡外差探测的影响研究[J].红外与激光工程,2015,44(10):2933-2937.GUO L R,HU Y H,LI ZH,et al..Influence of Local Oscillate power on micro-motion balanced heterodyne detection for Lidar[J].Infrared and Laser Engineering,2015,44(10):2933-2937.(in Chinese)
[5]BARRIOS R,DIOS F.Exponentiated Weibull model for the irradiance probability density function of a laser beam propagating through atmospheric turbulence[J].Optics&Laser Technology,2013,45:13-20.
[6]代永红,艾勇,肖伟,等.高速相干光通信平衡探测器研究[J].光子学报,2015,44(1):173-179.DAI Y H,AI Y,XIAO W,et al..The research of balance detector for high-speed coherence optical communications[J].Acta Photonica Sinica,2015,44(1):173-179.(in Chinese)
[7]梁赫西,代永红,艾勇,等.本振功率对空间平衡探测器相干探测灵敏度的影响[J].光学精密工程,2017,25(2):334-341.LIANG H X,DAI Y H,AI Y,et al..Influence of local oscillator power on sensitivity of coherent detection of space balance detector[J].Opt.Precision Eng.,2017,25(2):334-341.(in Chinese)
[8]AFLATOUNI F,BAGHERI M,HASHEMI H.Design methodology and architectures to reduce the semiconductor laser phase noise using electrical feedforward schemes[J].IEEE Transactions on Microwave Theory and Techniques,2010,58(11):3290-3303.
[9]CHO P S,HARSTON G,GREENBLATT A,et al..Integrated optical coherent balanced receiver[C].Coherent Optical Technologies and Applications.America:Optical Society of America,2006.
[10]JACOBSEN G,KAN J X,GARRETT I.Tuned front-end design for heterodyne optical receivers[J].Proceedings of Journal of Lightwave Technology,1989,7(1):105-114.
[11]JOSHI A,BECKER D,WREE C,et al..Coherent optical receiver system with balanced photodetection[J].Proceedings of the SPIE,2006,6243:62430E.
[12]WAN Q,WEI C.Research on technology of freespace coherent optical modulation and detection[C].Proceedings of 2011 International Conference on Consumer Electronics,Communications and Networks.XianNing,China:IEEE,2011:3475-3477.
[13]孔英秀,柯熙政,杨媛.空间相干光通信中本振光功率对信噪比的影响[J].红外与激光工程,2016,45(2):222002.KONG Y X,KE X ZH,YANG Y.Impact of local oscillator power on SNR in space coherent optical communications[J].Infrared and Laser Engineering,2016,45(2):222002.
[14]KAZOVSKY L G,TONGUZ O K.ASK and FSK coherent lightwave systems:a simplified approximate analysis[J].Journal of Lightwave Technology,1990,8(3):338-352.