The optical fiber rotary connection usually uses optical fiber beam expansion to achieve rotary coupling.The multi-core optical fiber rotary connection generally uses Dove prism to untwist.When the temperature changes,the optical path will tilt and deviate,resulting in increasing insertion loss.Aiming at the structure and process of the optical fiber rotary connection,a joint simulation model of the temperature and insertion loss of the optical fiber rotary connection is established.The thermal expansion matching optical path is designed,and the stress,deformation and insertion loss characteristics of single-mode optical path and multi-mode optical path of the deformed prism are simulated and analyzed.On the basis of simulation research,the 6-core single-mode and 8-core multi-mode mixed optical fiber rotary connection is produced.After actual testing,its insertion loss is less than 2.5 dB,and the change in insertion loss is not greater than 0.5 dB within the temperature range of-40～65℃,which verifies the effectiveness of the simulation model.The research approach is instructive for the evaluation of the temperature and insertion loss characteristics of other optical devices.
关键词
光纤旋转连接/联合仿真/插入损耗
Key words
optical fiber rotary connection/joint simulation/insertion loss
维普
万方数据