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双包层光纤激光器输出光中的包层光严重影响了激光的光束质量、光谱特性以及激光器的可靠性和稳定性,有效滤除包层光是双包层光纤激光器工程化的一个重要环节。对高功率包层光滤除器的热效应进行了理论与实验研究,利用ANSYS中流体动力学模块仿真分析了高功率包层光滤除器的温度场分布,在15~600 W的包层光滤除功率下进行了实验验证,在此基础上仿真优化了千瓦量级功率的包层光滤除器。优化后滤除器温度下降近46℃,可稳定工作在80℃左右。
The clad light in the output light of double-clad fiber laser has a serious impact on the laser beam quality, spectral characteristics and the reliability and stability of the laser. Effectively filtering clad light is an important part of the engineering of double clad fiber laser. The theoretical and experimental studies on the thermal effects of the high-power cladding optical filters were carried out. The temperature field distribution of the high-power optical filters was simulated using the fluid dynamics module in ANSYS. Experiments were carried out to verify the filter power. On the basis of the experimental results, a clad filter with kilowatt power was simulated and optimized. Optimized filter temperature dropped nearly 46 ℃, stable operation at about 80 ℃.