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在全光纤结构光纤激光器/放大器中,泵浦合束器的功率特性直接影响激光器/放大器最终输出功率。依据合束器的基本结构,分析了合束器的损耗来源,研究了不同情况下某系列国产合束器的功率和温度特性。指出了泵浦损耗、泵浦回光、环境温度以及泵光亮度等因素对合束器工作温度的影响。对某国产新型高功率合束器进行测试,测试结果表明,单臂可输入功率大于100 W,有望支撑全国产千瓦量级高功率光纤激光器,相关研究结果为合束器的设计和热管理提供了参考。
In all-fiber structured fiber lasers / amplifiers, the power characteristics of the pump combiner directly affect the final output power of the laser / amplifier. According to the basic structure of the beam combiner, the source of the loss of the beam combiner is analyzed, and the power and temperature characteristics of a series of beam splitters in different situations are studied. The effects of pump loss, pump return light, ambient temperature and pump brightness on the operating temperature of the beam combiner are pointed out. The test results of a domestic new high power beam combiner show that the input power of one arm is more than 100 W, and it is expected to support the national production of high power fiber laser of kilowatt level. The related research results provide the design and thermal management of the combiner For reference.