微振动对空间光-光纤耦合的影响及补偿方法

The Coupling Analysis of Space Light to Optical Fiber in Micro Vibration Environment and the Compensation Method

为了增强空间光-光纤耦合的耐振动性能,提高耦合效率,首先对微振动环境下空间光-光纤的耦合特征进行了分析,设计了一种新的锥形接收器;然后,并对锥形接收器的全反射特征和耦合性能进行了理论分析,在微振动环境下,新的锥形接收器耦合效率高于普通光纤接收器;最后,进行了实验研究,采用普通光纤作为接收器时,耦合效率随着振幅的增大而迅速降低,当振幅从0增大到280μrad时,耦合效率从95%降低至10%,但采用新型锥形光纤接收器时,耦合效率从95%降低至55%。结果表明,在微振动环境下,新型接收器能有效提高空间光光纤的耦合效率。

In order to reduce the influence of micro vibration on the coupling of spatial light to fiber,its coupling characteristics are studied and a new kind of conical receiver is put forward.Both the total reflection characteristics and the coupling performance of the tapered receiver are discussed theoretically.The resuit shows that,in the micro vibration environment,the coupling efficiency of the new tapered receiver ishigher than that of theconventional fiber receiver.Then,theexperimentspresentthatwhentheampli-t ude increases from 0 to 280rad,for the ordinary optical fiber receiver,the coupling efficiency decreases rapidly from 95%o 10%.On the other hand the efficiency fact or only dropso 55%with the new tapered optical fiber receiver.The resultsshow that,under theconditionofmicro vibration,thenew receiver can effectivel#impr've t9e cupling efficency.