Design and performance of a composite Tm:YAG laser pumped by VBG-stabilized narrow-band laser diode |
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| Affiliation: | 1.Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;2.University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A 2-μm composite Tm:YAG laser pumped with a narrow-band laser diode was presented. The temperature distribution and thermal lens in the Tm:YAG were numerically simulated by a finite element method and the results were used to design the special cavity, in order to achieve a high efficiency and stable output. With a 25-W incident pump power, we obtained a maximum output power of 11 W at 2018.5 nm, corresponding to a slope efficiency of 51.3% and an optical-to-optical efficiency of 44.5%, respectively. The beam quality was measured to be Mx2=1.8 and My2=1.6. |
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| Keywords: | Tm:YAG 2μm laser thermal effects diode-pumped |
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