高亮度半导体激光器的研制

Study of high brightness fiber coupled diode lasers

摘要: 针对高功率光纤激光器对高亮度、高功率光纤耦合半导体激光器的需求，研制了一种多单管半导体激光器，通过光束精密调试及空间和偏振合束等技术实现了高亮度、高功率光纤耦合输出。针对光纤芯径105 m，数值孔径0.22的光纤，研制了包含14只大功率单管的高亮度半导体激光器，并测试了其光电特性。实验结果表明：在工作电流为12 A时，光纤的输出功率可达120 W，对应亮度为9.1 MW/（cm2sr），电光效率45%。

Abstract: High power fiber laser requires high brightness and power fiber coupled laser diode module as pumping source. A multi-single emitter diode with high brightness and power was developed by precision assembling and beam combining technology. 14 laser diodes beam were coupled into a core diameter of 105 m, numerical aperture (NA) 0.22 fiber via spatial combination and polarization combination. Experiment results show that the optical power from fiber can reach to 120 W with a brightness of 9.1 MW/(cm2sr), and the electoral to optical efficiency is 45%, when operating current is 12 A.