Abstract Two new angled half-beam transformation systems (BTSs) for the reduction of the beam-divergence problem in laser-diode arrays with large smiles are investigated. Both simulations and experiments show that the angle of divergence of laser-diode arrays with the parabola-shaped smile and the S-shaped smile can be reduced by more than 37% and 23% respectively, when two angled half-BTSs are used in front of the laser-diode array. Furthermore, a fiber-coupling module, with a 400 μ m core-fiber and two angled half-BTSs, is fabricated. The optical/optical coupling efficiency increases to more than 85%, which is an improvement by more than 4% over laser diodes that use a full-BTS.

中文翻译：

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使用双光束变换系统减小具有大微笑的激光二极管阵列中的光束发散角

摘要 研究了两种新的角度半光束变换系统 (BTS)，用于减少大微笑激光二极管阵列中的光束发散问题。仿真和实验均表明，当前面使用两个成角度的半BTS时，抛物线形微笑和S形微笑的激光二极管阵列的发散角分别减少了37%和23%以上。激光二极管阵列。此外，还制造了具有 400 μm 芯光纤和两个成角度的半 BTS 的光纤耦合模块。光/光耦合效率提高到85%以上，比使用全BTS的激光二极管提高了4%以上。