100G光模块Lan-WDM合光器件的研究

Research on Lan-WDM Combining Device of 100G Optical Module

在光通讯领域中,提出将新型BLOCK结构的合光器件应用在光模块发射端中,并采用QSFP28封装。对此封装下合光信号出射后不能准直耦合进入磁光隔离器中的问题,设计了一种转折棱镜,实现对光路的转折。针对转折棱镜的加入使得光信号产生的偏振效应增大、插入损耗不满足要求的问题,根据琼斯矩阵等理论进行分析,对转折棱镜镀金属膜减少插入损耗。将转折棱镜胶合在COM端,对整体进行环境测试结果表明,该器件能够通过高低温、恒温恒湿测试,具有良好的耐环境适应性能。将其整体进行封装并测试,结果表明,产生的总插入损耗不超过0.7 dB,满足实际使用要求。

In the field of optical communications,i t is proposed that the new BLOCK structure of the light-combining de-vice is applied to the transmitting end of the optical module and adopt the QSFP28 package.To solve the problem that the combined light signal under the package cannot be collimated and coupled into the magneto-optical isolator after exiting,a turning prism is designed to realize the turning of the optical path.Aiming at the problem that the addition of the turning prism increases the polarization effect of the optical signal and the insertion loss does not meet the requirements,according to the theory of Jones matrix,t he metal coating of the turning prism is analyzed to reduce the insertion loss.The turning prism is glued to the COM end to test the overall environment.The results show that the device can pass high and low temperature,constant temperature and humidity tests,and has good environmental resistance.It is packaged and tested as a whole and the produced total insertion loss does not exceed 0.7 dB,which meets the actual use requirements.