大口径高功率激光二极管阵列端面泵浦技术研究
Research on the large-aperture high power laser diode arrays end-pumped coupling system
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摘要: 采用大口径、高功率激光二极管阵列的大型全固化二极管泵浦激光系统能够产生高功率、大能量、高重复频率和高光束质量的激光。为了实现对介质的高效泵浦，将空心透镜导管应用于大口径高功率激光二极管阵列耦合系统。基于3维光线追迹的数值计算方法，编制了LD纵向泵浦耦合系统模拟软件，对空心透镜导管进行模拟与设计，将发光面积超过100 cm2、功率达48 kW的二极管阵列发出的泵浦光，耦合到面积仅4 cm2的Nd:YLF中，在系统耦合效率超过70%的同时，增益介质表面泵浦场具有良好的均匀性。Abstract: Hollow lens duct is a good choice for the coupling system of the large-aperture high power diode arrays. With numerical analysis of three-dimension ray tracing, a computer simulation program was developed for end-pumped LD arrays coupling system. Based on the result of simulation, a coupling system for a large-aperture(>100 cm2) high-power(48 kW) LD arrays was built, which has a hollow lens duct and a homogenizer. The pumping radiations was coupled into a laser crystal of only about 4 cm2, with coupling efficiency beyond 70% and perfect pumping-uniformity in the gain material.
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Key words:
- diode arrays /
- amplifier /
- end-pumped
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