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针对制约单纤系统向更高功率输出面临的泵浦光源亮度受限和有源光纤泵浦注入区域温度控制受限的问题,提出一种新型的端面泵浦耦合器件。通过扩大信号光纤的包层直径,有效提升了可注入光纤系统的泵浦功率,同时有效降低了有源光纤端面泵浦注入区域的温度。在实验中获得了9.95k W的泵浦激光注入,并在单纤系统中实现了6 k W的输出。该器件具备10 k W以上的泵浦耦合能力,具备应用于万瓦级单纤系统的潜力。
Aiming at the problem of limited brightness of pump light sources and limited temperature control of active fiber pump injection area, the new type of end-pumped coupler is proposed to restrict the single fiber system to higher power output. By increasing the clad diameter of the signal fiber, the pumping power of the injectable fiber system is effectively increased, and the temperature of the injection area of the active fiber end-face pump is effectively reduced. A pump gain of 9.95kW was injected in the experiment and a 6kW output was achieved in a single fiber system. The device has a pump coupling capability of more than 10 kW and has the potential to be used in a single watt system of 10,000 watts.