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Proceedings Paper

High-beam-quality narrow-linewidth 13W continuous-wave fiber-based source at 970 nm
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Paper Abstract

We demonstrate a high-power fiber-laser-based source of continuous-wave (cw), linearly-polarized radiation at 970 nm in a simple, compact, and practical design. Using direct single-pass second-harmonic-generation (SP-SHG) of a cw thulium fiber laser at 1940 nm in a 40-mm-long periodically-poled LiNbO3 (PPLN) crystal, we have generated 13.1 W of output power at 970 nm for a fundamental power of 40 W. We achieved conversion efficiency as high as 32.7%. The generated second-harmonic output exhibits a passive power stability better than 1.4% (1σ value) over 1 hour, has a linewidth better than 0.3 nm, and a TEM00 spatial beam profile with M2<1.6. We further performed relevant theoretical calculations for the characterization of SP-SHG in the crystal.

Paper Details

Date Published: 16 May 2012
PDF: 6 pages
Proc. SPIE 8434, Nonlinear Optics and Applications VI, 843405 (16 May 2012); doi: 10.1117/12.922087
Show Author Affiliations
Kavita Devi, ICFO - Institut de Ciències Fotòniques (Spain)
S. Chaitanya Kumar, ICFO - Institut de Ciències Fotòniques (Spain)
M. Ebrahim-Zadeh, ICFO - Institut de Ciències Fotòniques (Spain)
Institucio Catalana de Recerca i Estudis Avancats (Spain)

Published in SPIE Proceedings Vol. 8434:
Nonlinear Optics and Applications VI
Benjamin J. Eggleton; Alexander L. Gaeta; Neil G. Broderick, Editor(s)

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