Kind of novel micro integrative transceiver module
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摘要: 光纤陀螺精度受温度、振动的影响较大.在分析了输入通道混偏型方案和全保偏型方案的局限性基础上,设计了一种微型化收发一体模块,将超辐射发光二极管光源、半透半反玻片、准直透镜、自聚焦透镜、PIN探测器和场效应晶体管电路集成在一起,采用系统内集成封装技术,封装内部抽真空.光在真空传播不产生双折射,因此避免了温度变化、振动等原因对系统精度和可靠性的影响,从而提高了光纤陀螺的整体性能.用光束扫描仪对Superlum公司生产的SLD-57-HP型光源建模,根据高斯光束的特性设计了光学系统,分析了菲涅尔反射损耗对其的影响,并用Zemax软件进行了仿真,其耦合效率为38.98%,远优于目前20%左右的耦合效率.Abstract: Fiber optic gyroscope (FOG) can be affected greatly by temperature and vibration. The limitations of input channel depolarization scheme and full polarization maintaining scheme were analyzed. Then, a kind of micro integrative transceiver module was designed to integrate super luminescent diode (SLD) source, half transmission and half reflection glass slide, collimation lens, GRIN lens, PIN detector and field effect technology (FET) circuit. The system in package (SIP) technique was applied and the vacuum was created. The light propagation in vacuum didn-t produce birefraction. Thus, the system accuracy and liability effects caused by temperature and vibration were avoided and the whole performance of FOG was promoted. The Superlum Inc. SLD-57-HP type source model was created by beam scanner. According to Gaussian beam characteristic, the compact optical system was designed and the Fresnel reflection loss was analyzed. Then, the simulation was exerted by Zemax software. The results show the coupling efficiency is 38.98% which exceeds current 20% coupling efficiency.
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Key words:
- fiber optic gyroscope (FOG) /
- transceivers /
- optical systems /
- Gaussian beams
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