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Non-linear optics; optical frequency conversion; optical parametric oscillation; singly-resonant oscillation

Tunable mid-infra-red radiation by singly resonant optical parametric oscillation based on KTA crystal pumped by multi-axial Gaussian shape beam from Q-switched Nd:YAG laser has been demonstrated. Threshold energy of oscillation at different idler wavelengths for different cavity length has been demonstrated. Single pass conversion efficiency of incident pump energy to infra-red wavelength has also been measured.

S Das¹ S Gangopadhyay¹ C Ghosh¹ G C Bhar¹

1. Laser Laboratory, Physics Department, Burdwan University, Burdwan - 713 104, India

Published

January 2005

Manuscript received

23 June 2004

Manuscript revised

25 August 2004

Accepted

8 October 2004