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Proceedings Paper

Spectral line narrowing of a degenerate PPLN OPO
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Paper Abstract

Laser beams with high peak power and narrow line output are fundamental for non-linear conversion. Novel intracavity techniques which improve the spectral brightness of a high average power, degenerate, periodically-poled Lithium Niobate (PPLN) optical parametric oscillator (OPO) are reported. The OPO was pumped with a modulated, high repetition rate Q-switched Nd:YAG laser, which produced an average power of 20 W in a near-diffraction limited beam. The broadband full width half maximum (FWHM) of the OPO was measured to be 120 nm, with an average power output of 7.7 W. Using an air-spaced etalon in combination with a quartz birefringent filter as line-narrowing elements, this decreased to a line-narrowed average power of 4.5 W, with a full width half maximum (FWHM) of 3 nm. Experimental results indicate that the power loss from the OPO is proportional to the residual loss of the line-narrowing elements in the OPO cavity.

Paper Details

Date Published: 17 June 2003
PDF: 9 pages
Proc. SPIE 4968, Solid State Lasers XII, (17 June 2003); doi: 10.1117/12.479844
Show Author Affiliations
Ian R. Jones, BAE Systems (United Kingdom)
Scott D. Niven, BAE Systems (United Kingdom)
Jonathan A. C. Terry, QinetiQ (United Kingdom)
David H. Titterton, Defence Science and Technology Lab. (United Kingdom)

Published in SPIE Proceedings Vol. 4968:
Solid State Lasers XII
Richard Scheps, Editor(s)

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