Phase-matching temperature shifts in blue generation by frequency doubling of femtosecond pulses in KNbO3
JOSA B, Vol. 16, Issue 8, pp. 1300-1304 (1999)
http://dx.doi.org/10.1364/JOSAB.16.001300
Acrobat PDF (129 KB)
Abstract
We have demonstrated temperature rises that result from nonlinear absorption in single-pass frequency-doubling experiments using femtosecond pulses and a 3-mm-thick KNbO3 crystal. These temperature changes shift the phase-matching curve and must be accounted for to optimize the conversion efficiency. We obtained a maximum second-harmonic generation (SHG) efficiency of 66% at an input power of 107 mW and a slope efficiency of ∼1.5%/mW at low input powers. We have investigated, for the first time to our knowledge, the focusing dependence of the phase-matching temperature. We have also found that the temperature-dependent SHG efficiency in femtosecond SHG experiments is significantly different from that obtained for frequency doubling of continuous-wave light.
© 1999 Optical Society of America
[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
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
Citation
Sungkyu Yu and A. M. Weiner, "Phase-matching temperature shifts in blue generation by frequency doubling of femtosecond pulses in KNbO3," J. Opt. Soc. Am. B 16, 1300-1304 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-8-1300
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