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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 16 — Aug. 3, 2009
  • pp: 13711–13726

High-power, single-frequency, continuous-wave second-harmonic-generation of ytterbium fiber laser in PPKTP and MgO:sPPLT

S. Chaitanya Kumar, G. K. Samanta, and M. Ebrahim-Zadeh  »View Author Affiliations


Optics Express, Vol. 17, Issue 16, pp. 13711-13726 (2009)
http://dx.doi.org/10.1364/OE.17.013711


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Abstract

Characteristics of high-power, narrow-linewidth, continuous-wave (cw) green radiation obtained by simple single-pass second-harmonic-generation (SHG) of a cw ytterbium fiber laser at 1064 nm in the nonlinear crystals of PPKTP and MgO:sPPLT are studied and compared. Temperature tuning and SHG power scaling up to nearly 10 W for input fundamental power levels up to 30 W are performed. Various contributions to thermal effects in both crystals, limiting the SHG conversion efficiency, are studied. Optimal focusing conditions and thermal management schemes are investigated to maximize SHG performance in MgO:sPPLT. Stable green output power and high spatial beam quality with M2<1.33 and M2<1.34 is achieved in MgO:sPPLT and PPKTP, respectively.

© 2009 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(140.7300) Lasers and laser optics : Visible lasers
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4400) Nonlinear optics : Nonlinear optics, materials

ToC Category:
Nonlinear Optics

History
Original Manuscript: June 15, 2009
Revised Manuscript: July 8, 2009
Manuscript Accepted: July 9, 2009
Published: July 24, 2009

Citation
S. Chaitanya Kumar, G. K. Samanta, and M. Ebrahim-Zadeh, "High-power, single-frequency, continuous-wave second-harmonic-generation of ytterbium fiber laser in PPKTP and MgO:sPPLT," Opt. Express 17, 13711-13726 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-16-13711


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