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Optics Letters

Optics Letters

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  • Vol. 23, Iss. 18 — Sep. 15, 1998
  • pp: 1441–1443

High-efficiency blue generation by frequency doubling of femtosecond pulses in a thick nonlinear crystal

A. M. Weiner, A. M. Kan’an, and D. E. Leaird  »View Author Affiliations


Optics Letters, Vol. 23, Issue 18, pp. 1441-1443 (1998)
http://dx.doi.org/10.1364/OL.23.001441


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Abstract

We have demonstrated highly efficient frequency doubling of femtosecond pulses in a thick, noncritically phase-matched KNbO3 crystal under conditions of large group-velocity mismatch. At low power we observed a slope efficiency of ∼300% nJ -1 for harmonic conversion, and at higher powers we generated 170 mW of second-harmonic blue output for 300 mW of input light. Furthermore, we have shown that the focusing dependence for our conditions of large group-velocity mismatch is considerably different from that obtained for frequency doubling of continuous-wave light. We have also demonstrated that one can tune the spectral width of the generated blue light by varying the focusing conditions.

© 1998 Optical Society of America

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4160) Nonlinear optics : Multiharmonic generation
(320.0320) Ultrafast optics : Ultrafast optics
(320.2250) Ultrafast optics : Femtosecond phenomena

Citation
A. M. Weiner, A. M. Kan’an, and D. E. Leaird, "High-efficiency blue generation by frequency doubling of femtosecond pulses in a thick nonlinear crystal," Opt. Lett. 23, 1441-1443 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-18-1441


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