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Nd:YAG laser; diode-side-pumped; Q-switched; coupled cavity resonator; intracavity second-harmonic generation; thermal lens.

A 52-W green laser at 532 nm by extra-cavity second-harmonic generation in a coupled-cavity configuration is demonstrated. The fundamental laser is a diode-side-pumped acousto-optic (AO) Q-switched Nd:YAG rod laser producing 84 W of average power at 1064 nm at 8 kHz repetition rate. Type-II phase-matched polished KTP crystal is used as the nonlinear crystal for second-harmonic generation. The individual green pulse width is 50 ns and the fundamental to second harmonic conversion efficiency is 61.8%.

S K Sharma¹ A J Singh¹ P K Mukhopadhyay¹ S M Oak¹

1. Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore 452 013, India

Published

November 2010