High efficiency Nd:YVO4/LBO critical phase matching green laser - Details

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Abstract：

A　high　efficiency,　composite　and　air　cooling　LD　end-pumped　Nd:YVO4,　acousto-optic　(AO)　Q-switched,　and　LBO　(critical　phase　matching)　intracavity　doubled　all-solid-state　green　laser　is　reported.　By　analyzing　the　absorption　characteristics,　with　different　polarized　light　pump,　the　uniformity　of　the　crystal　absorption　could　be　significantly　improved　when　the　gain　medium　was　pumped　with　partially　polarized　light.　The　fundamental　wave　distortion　could　be　improved　and　the　conversion　efficiency　could　be　enhanced.　When　the　incident　pump　power　was　33　W,　the　repetition　rate　of　the　AO-Q　switch　was　20　kHz,　a　1064　nm　fundamental　frequency　laser　with　an　output　power　of　15　W　and　a　pulse　width　of　23.96　ns　was　obtained.　The　output　power　of　532　nm　green　laser　was　11.2　W.　The　optical　to　optical　conversion　efficiency　from　diode　to　green　and　from　IR　to　green　laser　were　about　34%　and　74.6%.　The　output　power　instability　was　0.5122%　at　the　output　power　of　10　W,　the　M2　beam　quality　factor　was　1.2　in　the　horizontal　direction　and　1.1　in　the　vertical　direction.

Keyword：

Q switching Phase matching Conversion efficiency Light polarization Optical pumping Efficiency

Author Community：

[ 1 ] [Zhang, Xuehui]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Jiang, Menghua]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Liu, Bin]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Hui, Yongling]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Lei, Hong]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Li, Qiang]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China