5 kW振荡放大一体化高可靠性光纤激光器  

5 kW oscillating-amplifying integrated fiber laser with high reliability

作　　者：奚小明 曾令筏 张汉伟[1,2,3] 王鹏 杨保来[1,2,3] 王小林 许晓军 Xi Xiaoming;Zeng Lingfa;Zhang Hanwei;Wang Peng;Yang Baolai;Wang Xiaolin;Xu Xiaojun(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China;State Key Laboratory of Pulsed Power Laser Technology,Changsha 410073,China;Hunan Provincial Key Laboratory of High Energy Laser Technology,Changsha 410073,China)

机构地区：[1]国防科技大学前沿交叉学科学院,长沙410073 [2]脉冲功率激光技术国家重点实验室,长沙410073 [3]高能激光技术湖南省重点实验室,长沙410073

出　　处：《强激光与粒子束》2021年第7期1-3,共3页High Power Laser and Particle Beams

基　　金：长沙市杰出创新青年培养计划(kq2009004);脉冲功率激光技术国家重点实验室主任基金项目(SKL2020ZR04)。

摘　　要：振荡放大一体化光纤激光器具有振荡器抗回光能力强和放大器效率高的双重优点,在工业领域有着很好的应用前景。国防科大首次实现了输出功率大于5 kW的振荡放大一体化光纤激光器,光光效率约为80%。重点研究了该激光器在高功率运行时的可靠性和控制逻辑。首先,类比普通放大器中“不开种子、只开放大”的情况:在振荡部分泵浦源关闭时,瞬间开启放大部分泵浦源;其次,类比普通放大器中“不关放大、只关种子”的情况:在放大部分泵浦源开启时,瞬间关闭振荡部分泵浦。实验结果表明,以上两种极端情况下激光器都可稳定正常工作。首次验证了该激光器在控制逻辑和泵浦源开关顺序方面无特殊要求。We demonstrated a novel fiber laser system with oscillating-amplifying integrated configuration and a 5 kW output power was achieved experimentally for the first time with optical-to-optical efficiency of 80%.The reliability and the boot order of the laser system were studied intensively at high power level.When the laser system is deliberately turn on in a wrong order,such as the pump of the amplifying section is switched on before the oscillating section,or the pump of the oscillating section is switched off before the amplifying section,which is normally a disaster in a classic main oscillator power amplifier(MOPA)system,the laser system can trouble-free operate at full power level.For the first time,it is verified that there is no priority between the amplifier and the seed in the oscillating-amplifying integrated fiber laser system.

关 键 词：光纤激光器 振荡放大一体化 受激拉曼散射 模式不稳定效应 控制逻辑 

分 类 号：TN242[电子电信—物理电子学]