1.63kW单纤单振单模连续全光纤激光器  

1.63kW monolithic continuous-wave single-mode fiber laser oscillator

作　　者：史伟[1,2,3,4] 房强 许阳 秦玉果 樊景丽 孟祥杰 张启航 

机构地区：[1]天津欧泰激光科技有限公司,天津300384 [2]天津大学精密仪器与光电子工程学院,天津300372 [3]天津现代激光与光学研究所,天津300384 [4]山东海富光子科技股份有限公司,山东威海264209

出　　处：《光电子．激光》2015年第4期662-666,共5页Journal of Optoelectronics·Laser

基　　金：天津市科技支撑计划(13ZCZDX04200);中物院高能激光科学与技术重点实验室创新基金(2013HEL04)资助项目

摘　　要：报道了一种单纤单振单模连续全光纤激光器,工作波长为1 080nm,输出功率可达1.63kW。激光器使用7个输出功率为300 W、工作波长为976nm的半导体激光器(LDs)充当泵浦源,并利用短腔长结构成功地抑制了受激拉曼散射(SRS)。测试结果显示,所获得激光的光谱信噪比(SNR)大于40dB,1h内的功率不稳定度小于1%,光-光转换效率约为75.46%。此外,通过对光纤盘绕的合理设计,有效地抑制了光纤中的高阶模式,在满功率输出时成功地获得了单模激光(M2<1.1)。We demonstrate a monolithic continuous wave （CW） fiber laser oscillator, producing ~ 1.63 kW laser power at 1080 nm. In our experiment,the monolithic laser oscillator was pumped by 7 fiber- pigtailed laser diodes with the maximum output power of ~ 300 W. The operating wavelengths of all these pump laser diodes are near 976 urn,enabling a short laser cavity （~27 m） to effectively suppress the stimulated Raman scattering （SRS）. The laser spectrum with the maximum output power has a sig- nal to noise ratio （SNR） more than 40 dB. In addition, the fiber coiling technique was adopted to effec- tively depress the high-order laser modes to obtain the single mode beam quality （M2〈1. 1） at the max- imum output laser power. The optical to optical conversion efficiency of the monolithic laser oscillator with respect to the launched pump power is as high as ~75.46%. The laser oscillator kept running for an hour at the maximum output power. No power roll-over was observed and power fluctuation lower than 1 % was achieved. The all fiber construction of the laser oscillator enables compact size, mainte- nance-free,robust operation and thus allows various practical applications in industry material process- ing, such as laser cutting, laser drilling, laser clamping, laser welding, etc.

关 键 词：光纤激光器 单纤单振激光器 kW量级激光器 单模激光器 

分 类 号：TN248[电子电信—物理电子学]