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Proceedings Paper

A high-repetition-rate PPLN mid-infrared optical parametric oscillator source
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Paper Abstract

High average power sources operating in the 3 to 5 μm mid-infrared waveband are of interest for a wide variety of applications. We present design and performance results for a high-power engineered breadboard mid-IR source based on near-infrared pumped periodically-poled lithium niobate (PPLN) optical parametric oscillator (OPO) technology. The source design utilises a pair of singly-resonant PPLN OPOs pumped by a commercial 40 Watt, Q-switched, diode-pumped Nd:YLF laser. The mid-IR outputs from each OPO are polarisation recombined into a single output beam. A twin OPO design was chosen to minimise the effect of optical absorption, reduce thermal loading within each PPLN crystal and provide additional flexibility by offering the option for dual-wavelength mid-IR operation. An average output power approaching 4 Watts has been obtained with a corresponding slope efficiency of 15%. The mid-infrared beam is 6 times diffraction limited. Laser operation is controlled by a remote PC link and power, spectral and temporal pulse diagnostics are included within the system.

Paper Details

Date Published: 23 December 2004
PDF: 10 pages
Proc. SPIE 5620, Solid State Laser Technologies and Femtosecond Phenomena, (23 December 2004); doi: 10.1117/12.577866
Show Author Affiliations
Paul D. Mason, QinetiQ (United Kingdom)
Nicholas J. Wood, QinetiQ (United Kingdom)

Published in SPIE Proceedings Vol. 5620:
Solid State Laser Technologies and Femtosecond Phenomena
Jonathan A. C. Terry; W. Andrew Clarkson, Editor(s)

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