The working environment of Planar Lightwave Circuit (PLC) optical splitter is complex and diverse. In addition to withstanding the test of environmental temperature changes, the device may also be affected by mechanical shock such as vibration. Through the thermal-vibration coupling online test, it was found that the insertion loss of the PLC optical splitter changes significantly when the vibration test is performed under high temperature and low temperature environment (the maximum insertion loss change was 4.491dB at 75 °C, and 3.941dB at −40°C). In the same temperature environment, the optical performance of the device during the lateral test and the vertical test was more affected by vibration than in the horizontal test. The study of reliability under combined vibration and temperature fields is helpful to understand and improve the ability of devices to work normally in complex environments.

中文翻译：

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PLC光分路器热振耦合可靠性在线研究

平面光波电路（PLC）分光器的工作环境复杂多样。设备除了经受环境温度变化的考验外，还可能受到振动等机械冲击的影响。通过热振耦合在线测试发现，在高温低温环境下进行振动测试时，PLC分光器的插入损耗变化较大（75℃时最大插入损耗变化为4.491dB， -40°C 时为 3.941dB）。在相同温度环境下，横向测试和纵向测试时器件的光学性能受振动影响比横向测试时更大。