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Proceedings Paper

High-average-power KTP ring OPO
Author(s): Larry S. Lingvay; Nahum Angert; Michael Roth
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Paper Abstract

A KTiOPO4 (KTP) OPO operating at an average power level of 26.3 W was demonstrated. To our knowledge this is the highest average power that a KTP OPO has ben operated at to date. The OPO used three 1 sq. cm aperture KTP crystal cut for non-critical phase matching at 1.064 micrometers . The crystals were 10 by 10 by 20 mm in size, cut from a large crystal, which was grown from a modified self-flux by pulling on an x-oriented seeded. The pump laser operated at 100 pps repetition rate at an average power of just over 71 watts, and pump power densities above 60 MW/sq. cm. All of the elements were AR coated for 1.06 micrometers and 1.576 micrometers . Signal wavelength conversion efficiency of 37 percent was achieved in this configuration. Idler output was not measured, but no thermo-lensing was observed due to the enhanced transmission of our crystals at the idler wavelength of 3277 nm. Some crystal damage was observed over time, apparently due to pump laser instability. The result are especially interesting since past experience had shown that KTP elements fail rapidly under these high average power conditions. Future work will compare the performance of a single long KTP OPO element with that of multiple short elements, in the same resonator.

Paper Details

Date Published: 23 March 2000
PDF: 5 pages
Proc. SPIE 3928, Nonlinear Materials, Devices, and Applications, (23 March 2000); doi: 10.1117/12.379929
Show Author Affiliations
Larry S. Lingvay, Schwartz Electro-Optics, Inc. (United States)
Nahum Angert, Raicol Crystals Ltd. (Israel)
Michael Roth, Hebrew Univ. (Israel)

Published in SPIE Proceedings Vol. 3928:
Nonlinear Materials, Devices, and Applications
Jeffrey W. Pierce, Editor(s)

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