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Optics Letters

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  • Vol. 24, Iss. 4 — Feb. 15, 1999
  • pp: 205–207

Generation of 740 mW of blue light by intracavity frequency doubling with a first-order quasi-phase-matched KTiOPO4 crystal

M. Pierrou, F. Laurell, H. Karlsson, T. Kellner, C. Czeranowsky, and G. Huber  »View Author Affiliations


Optics Letters, Vol. 24, Issue 4, pp. 205-207 (1999)
http://dx.doi.org/10.1364/OL.24.000205


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Abstract

We report on efficient intracavity frequency doubling of a cw diode-pumped Nd:YAG laser on the 4F3/24I9/2 laser transition at 946 nm. The nonlinear crystal used in the experiments was a first-order quasi-phase-matched flux-grown KTiOPO4 crystal (period, 6.09μm ; thickness, 1 mm; length, 9 mm). The fluctuations in the generated second-harmonic wave were lower than 3% at output powers of as much as 500 mW. The overall optical-to-optical efficiency was 5.7%. A maximum output power of 740 mW of blue light was generated, which was stable for only 0.5 min. The decrease the output power at this power level was attributed to heating and thermal lensing in the periodically poled KTiOPO4 crystal. The short-term behavior of the second-harmonic wave exhibited switching between a cw mode and chaotic intensity fluctuations.

© 1999 Optical Society of America

OCIS Codes
(140.3540) Lasers and laser optics : Lasers, Q-switched
(140.3590) Lasers and laser optics : Lasers, titanium
(140.7300) Lasers and laser optics : Visible lasers
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4400) Nonlinear optics : Nonlinear optics, materials

Citation
M. Pierrou, F. Laurell, H. Karlsson, T. Kellner, C. Czeranowsky, and G. Huber, "Generation of 740 mW of blue light by intracavity frequency doubling with a first-order quasi-phase-matched KTiOPO4 crystal," Opt. Lett. 24, 205-207 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-4-205


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