20 February 2007 Volume Bragg grating improves characteristic of resonantly diode-pumped Er:YAG, 1.65-&mgr;m DPSSL
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Abstract
Significant performance improvement of the Er(0.5%):YAG diode pumped solid state laser (DPSSL) has been achieved by pump diode spectral narrowing via implementation of external volumetric Bragg grating (VBG). Without spectral narrowing, with a pump path length of 15 mm, only 37% of 1532 nm pump was absorbed. After the VBG spectral narrowing, the absorption of the pumping radiation increased to 62%. As a result, the incident power threshold was reduced by a factor of 2.5; the efficiency increased by a factor of 1.7, resulting in a slope efficiency of ~23%. A maximum of 51 W of CW power was obtained versus 31 W without the pump spectrum narrowing.
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Igor Kudryashov, Igor Kudryashov, Dmitri Garbuzov, Dmitri Garbuzov, Mark Dubinskii, Mark Dubinskii, } "Volume Bragg grating improves characteristic of resonantly diode-pumped Er:YAG, 1.65-&mgr;m DPSSL", Proc. SPIE 6451, Solid State Lasers XVI: Technology and Devices, 64510P (20 February 2007); doi: 10.1117/12.699154; https://doi.org/10.1117/12.699154
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