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为了对4×10Gbit/s并行光模块光串扰进行优化,采用了ABCD传输矩阵法,结合光纤耦合约束条件以及准直透镜、自聚焦透镜和光纤端面球透镜的理论,设计出两套优化方案。研究了垂直腔面发射激光器光束特性,利用MATLAB进行理论分析,模拟得出光斑半径与发散角的关系,并分析了串扰情况。在ZEMAX非序列模式下完成了光路建模,优化结构中透镜参量以及光纤端面设计,进行了理论分析和实验验证,取得了优化后耦合光斑半径与耦合效率。结果表明,间接耦合优化结构中,到达光纤端面的光斑为53.72μm,耦合效率达到72.59%;而直接耦合优化结构中,到达光纤端面的光斑为3.695μm,耦合效率高达到76.11%,有效地解决了并行光模块之间的光串扰问题。这一结果对光网络信号传输质量优化方面是有帮助的。
In order to optimize the optical crosstalk of the 4 × 10Gbit / s parallel optical module, two optimization schemes are designed using the ABCD transfer matrix method combined with the coupling constraints of the fiber and the theory of collimating lens, self-focusing lens and fiber end face spherical lens. The characteristics of the vertical cavity surface emitting laser beam are studied. The theoretical analysis is carried out by using MATLAB. The relationship between the spot radius and the divergence angle is simulated and the crosstalk situation is analyzed. In the ZEMAX non-sequential mode, the optical path modeling is completed, the lens parameters and the fiber end face design are optimized, and the theoretical analysis and experimental verification are carried out. The optimized coupling spot radius and coupling efficiency are obtained. The results show that the spot reaching the end face of the fiber is 53.72μm and the coupling efficiency reaches 72.59% in the indirect coupling optimization structure. In the direct coupling optimization structure, the spot reaching the fiber end face is 3.695μm and the coupling efficiency is up to 76.11%, effectively solving Optical crosstalk between parallel optical modules. This result is helpful in optimizing the optical network signal transmission quality.