半导体激光器与单模光纤对准平台运动误差分析

The Motion Errors Analysis of Laser Diode and Single-Mode Fiber Alignment Stages

为了实现半导体激光器与单模光纤快速精确耦合对准,需分析对准平台的扰动特性.首先,基于半导体激光器与单模光纤的对准误差,构建了五维对准平台.然后,针对半导体激光器与单模光纤对准过程中运动误差的随机性问题,运用多体系统理论,建立了对准平台的拓扑结构模型,并分析了其运动过程中的位姿,得到了半导体激光器末端点运动误差模型.最后,利用Monte Carlo方法,结合该运动误差模型,对运动误差进行了概率分析.结果表明:在不考虑静止误差的情况下,半导体激光器末端点的位置在x、y和z三个方向的运动误差近似为中间高两边低的对称分布.此分析可为对准过程中运动误差补偿提供数据参考.

In order to achieve fast and accurate coupling alignment between laser diode and single-mode fiber,disturbance characteristics need to be analyzed.First,based on the alignment errors between laser diode and single-mode fiber,a 5-dimension alignment stages was designed.And then,aiming at the randomness problems of motion errors in the alignment process of laser diode and single-mode fiber,the multi-body system theory was used for establishing the topological structure model of alignment stages and analyzing their positions and orientations in the movement,the motion error model of the end point of laser diode was obtained.Finally,combined with this motion error model,the Monte Carlo method was used for a probability analysis of motion errors.In the case of without considering static errors,the result indicates that the position of the end point of laser diode in the x,y and z direction motion errors are similar to symmetrical distribution,which is high in the middle and low on both sides.This analysis could provide a data reference for motion error compensation in the alignment process.