高精度光波导损耗测试系统的设计与实现

以波导耦合理论为依据,采用棱镜耦合法设计了集光电为一体的高精度波导损耗测量系统。测量以激光为光源,采用双光路法,消除了通用检测仪由于光源光强不稳定产生的误差,使得测量结果只与光强的相对变化量有关;光波出入波导均采用棱镜耦合,减少了普通测试方法因样品质量及面形误差和端面洁净情况不同或输出透镜不能很好汇聚光波而产生的误差;利用常规仪器设备实现了数字化检测显示,避免了人为主观读数产生的误差; 利用AD538实时模拟计算芯片,提高了计算精度和运算速度。

The Design and Implement of Highly Precise Loss Measurement System on Optical Waveguide

Based on coupling theory, the incorporating high-precision photoelectricity measuring device of waveguide dissipation was designed. In the course of testing, the laser was used as light source with twin-light path, dispelled the error of light-intensity variation of traditional detection devices, the measurement result only relates to the relative change of optical intensity. The prism coupler was employed while light wave entry and leave wave guide, it has greatly reduced the error caused by quality of the sample and clean situation of terminal surface or bad performance of assembling the light wave of output lens. The system made use of some conventional equipment to realize digitized detection display technique and avoided the errors in reading. The real-time simulation chip of AD538 was used, it has greatly improved the calculation precision and operating speed.