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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 7 — Jul. 27, 2011

13.1 W, high-beam-quality, narrow-linewidth continuous-wave fiber-based source at 970 nm

Kavita Devi, S. Chaitanya Kumar, and M. Ebrahim-Zadeh  »View Author Affiliations

Optics Express, Vol. 19, Issue 12, pp. 11631-11637 (2011)

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We report an efficient fiber-laser-based source of high-power, 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 at a 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. Relevant theoretical calculations for the characterization of SP-SHG in the crystal have also been performed.

© 2011 OSA

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4400) Nonlinear optics : Nonlinear optics, materials

ToC Category:
Nonlinear Optics

Original Manuscript: March 23, 2011
Revised Manuscript: May 5, 2011
Manuscript Accepted: May 25, 2011
Published: June 1, 2011

Virtual Issues
Vol. 6, Iss. 7 Virtual Journal for Biomedical Optics

Kavita Devi, S. Chaitanya Kumar, and M. Ebrahim-Zadeh, "13.1 W, high-beam-quality, narrow-linewidth continuous-wave fiber-based source at 970 nm," Opt. Express 19, 11631-11637 (2011)

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