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Tm,Ho:YLF laser end-pumped by a semiconductor diode laser array
Tm,Ho:YLF laser end-pumped by a semiconductor diode laser array
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机译：Tm，Ho：由半导体二极管激光器阵列端泵浦的YLF激光器
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摘要
A Ho:YLF crystal including Tm as sensitizers for the activator Ho, is optically pumped with a semiconductor diode laser array to generate 2.1 . mu.m radiation with a pump power to output power of efficiency as high as 68%. The prior-art dual sensitizer system of Er and Tm requires cooling, such as by LN.sub.2, but by using Tm alone and decreasing the concentrations of Tm and Ho, and decreasing the length of the laser rod to about 1 cm, it has been demonstrated that laser operation can be obtained from a temperature of 77° K. with an efficiency as high as 68% up to ambient room temperature with an efficiency at that temperature as high as 9%.
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