基于自由空间光的可调谐DPSK信号解调器  

A tunable demodulator of DPSK signal based on free space light

作　　者：刘国栋[1] 吴重庆[1] 毛雅亚[1] 王甫[1] 李政勇[1] 

机构地区：[1]北京交通大学教育部发光与光信息技术重点实验室,光信息科学与技术研究所,北京100044

出　　处：《北京交通大学学报》2014年第3期164-167,共4页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(61275075,11274037);北京市自然科学基金资助项目(4132035)

摘　　要：提出了一种基于自由空间差分延时干涉的可快速调谐的DPSK信号解调器.实现了10Gb/s以及40Gb/s NRZ-DPSK信号的解调,误码率小于10-9.实验结果证明该解调器适用于10Gb/s及更高比特速率NRZ-DPSK信号的解调,调谐时间可达μs,调谐范围从2.5Gb/s到40Gb/s.与波导型马赫-曾德尔型差分延迟干涉解调器相比,能实现快速调谐,可用于克服因信号抖动导致的时钟失步等问题.A new scheme of demodulating DPSK signal is proposed based on structure of free space differential delay interference which is suitable for variable bit-rate and the tuning speed is faster than the existed demodulator.The demodulation of variable bit-rate NRZ-DPSK formats of 10 Gb/s and 40 Gb/s is demonstrated,and the BER after demodulating is lower than 10-9.It is proved that the proposed demodulator can be used to demodulate 10 Gb/s to tens Gb/s bit rate DPSK signal,and the tuning time reaches to μs and the tuning range can be achieved between 2.5 Gb/s to 40 Gb/s.Compared to other DPSK demodulators based on MZ structure,the tunable speed of this demodulator is tunable and can overcome the phase jitter and out of sync of the clock.

关 键 词：DPSK 可调谐 解调 干涉 自由空间 

分 类 号：TN722.32[电子电信—电路与系统]