External-cavity diamond Raman laser performance at 1240 nm and 1485 nm wavelengths with high pulse energy

We report on an external-cavity diamond Raman laser (DRL) pumped with a Q-switched Nd:YAG and generating at 1st and 2nd Stokes (1240 nm and 1485 nm) with enhanced output energy. The slope efficiency of 54% and output energy as high as 1.2 mJ in single pulse at 1240 nm have been achieved with optimiz...

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Bibliographic Details
Published in:Laser physics letters 2016-06, Vol.13 (6), p.65001
Main Authors: Pashinin, V P, Ralchenko, V G, Bolshakov, A P, Ashkinazi, E E, Gorbashova, M A, Yurov, V Yu, Konov, V I
Format: Article
Language:English
Subjects:
diamond Raman laser
optical frequency conversion
stimulated Raman scattering
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Summary:We report on an external-cavity diamond Raman laser (DRL) pumped with a Q-switched Nd:YAG and generating at 1st and 2nd Stokes (1240 nm and 1485 nm) with enhanced output energy. The slope efficiency of 54% and output energy as high as 1.2 mJ in single pulse at 1240 nm have been achieved with optimized cavity, while the pulse energy of 0.70 mJ was obtained in the eye-safe spectral region at 1485 nm. Calculations of thermal lensing effect indicate it as a possible reason for the observed decrease in conversion efficiency at the highest pump energies.
ISSN:1612-2011
1612-202X
DOI:10.1088/1612-2011/13/6/065001