分数自成像平面波导的光束组束

Laser beam addition of planar waveguides with fractional self-imaging

研究了激光束在分数自成像平面波导中的传输特性,提出了利用分数自成像平面波导进行光束组束的技术方案,讨论了激光束之间相位失配对光束组束的影响,并对两个输出平均功率为300W的板条激光器的光束组束进行了数值实验模拟.结果表明,分数自成像平面波导的光束组束可以有效地改善多个激光器组束后的光束质量因子M2,从而提高激光输出的亮度;而且这种组束方法对激光束之间相位失配的敏感度明显降低.

Propagation characteristics of laser beams are examined in fractional self-imaging planar waveguides. A potential approach to laser beam combining is proposed by application of planar waveguides with fractional self-imaging. The influences of phase mismatch between laser beams on laser beam addition are discussed. The numerical simulation for two lasers with average power of 300 W shows that the beam addition in fractional self-imaging planar waveguide can improve the parameter M2 of combined beam effectively. The sensitivity of beam addition to the phase mismatch between laser beams has been reduced obviously.