Study on beam shaping of laser diodes using Lloyd's mirror interference

将该方法应用于三种不同激光波长和不同光束发散角的激光二极管。利用单衬底反射镜成功地将激光二极管发射的椭圆光束转化为近圆形光束。用数值方法研究了光束形状对激光特性的影响。此外，还对定制梁的光束质量因子进行了观测，发现其质量因子为1.24。提出了一种基于光束整形法的激光二极管与光纤的光耦合系统，并对耦合效率进行了估计。

We applied our beam shaping method to three kinds of laser diodes which have different lasing wavelength and different beam divergence angle. Elliptical beams emitted from the laser diodes were successfully transformed to nearly circular beams using a single substrate mirror. The dependence of the beam shape on the lasing characteristics was investigated numerically. Moreover beam quality factor of the tailored beam was observed and found to be as good as 1.24. We proposed an optical coupling system between a laser diode and an optical fiber based on the beam shaping method and estimated the coupling efficiency.