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High-average-power 1-μm performance and frequency conversion of a diode-end-pumped Yb:YAG laser

Authors :
Kenneth S. Jancaitis
S.B. Sutton
Jay A. Skidmore
Raymond J. Beach
Camille Bibeau
Mark A. Emanuel
Scott C. Mitchell
Christopher A. Ebbers
Source :
IEEE Journal of Quantum Electronics. 34:2010-2019
Publication Year :
1998
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), 1998.

Abstract

Using a diode-end-pumped technology, a Yb:YAG laser capable of delivering up to 434 W of CW power has been demonstrated. The system incorporates a unique composite rod design which allows for high-average-power operation while simultaneously suppressing parasitic oscillations. Modeling and experimental data to support the quenching of parasitics are discussed. Beam quality measurements for CW operation with several cavity configurations are presented. In particular, beam quality measurements at 340-W CW yielded a beam quality factor of M/sup 2/=21. Predictions of a quasi-three-level model are compared with the experimental data for several output coupler reflectivities. An observed dependence of the cavity mode fill as a function of output coupler reflectivity is discussed. Employing a single acoustooptical switch, the system was Q-switched at 10 kHz and generated output powers up to 280 W with a measured beam quality of M/sup 2/=6.8 at 212 W, With an external dual-KTP crystal configuration, the Q-switched output was frequency converted to 515 nm and produced up to 76 W at 10 kHz in a 30-ns pulse length.

Details

ISSN :
00189197
Volume :
34
Database :
OpenAIRE
Journal :
IEEE Journal of Quantum Electronics
Accession number :
edsair.doi...........86ac268295475dbc6faa8c8baec1a49a
Full Text :
https://doi.org/10.1109/3.720241