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为了提高光收发模块封装过程中激光束与光纤的耦合效率,设计了一款高效耦合装置。选取850nm垂直腔表面发射式激光器(VCSEL),给出了平凸透镜参数,并分析了该微透镜性能。为优化光纤阵列接口,提高器件集成度,改进了传统V型槽;从单光源光路分析,以验证光路的合理性并给出了基于VCSEL的120Gb(10Gb×12)并行光收发模块耦合结构剖面图。最后,分析了透镜间的平行误差和光纤端面倾角误差,从理论上计算了耦合效率,并利用Zemax软件进行仿真验证。结果表明:该耦合装置集成度高,封装成本低,耦合效率可达87.90%。
In order to improve the coupling efficiency between the laser beam and the optical fiber during the optical transceiver module package, an efficient coupling device is designed. 850nm vertical cavity surface emitting laser (VCSEL) was selected, the parameters of plano-convex lens were given, and the performance of the microlens was analyzed. In order to optimize the optical fiber array interface and improve the device integration, the traditional V-groove is improved. From the single light source optical path analysis, the rationality of optical path is verified and the coupling structure of 120Gb (10Gb × 12) parallel optical transceiver module based on VCSEL is given Figure Finally, the parallel errors between the lenses and the fiber end-face tilt errors were analyzed. The coupling efficiency was theoretically calculated and verified by Zemax software. The results show that the coupling device has high integration, low packaging cost, and the coupling efficiency can reach 87.90%.