Short-wavelength light source

Details Short-wavelength light source Short-wavelength light source

2006-04-11

2010-06-22

Petkovsek, Daniel (Department: 2874)

Optical: systems and elements

Optical frequency converter

Harmonic generator

C372S022000

Reexamination Certificate

active

07742221

ABSTRACT:
A short wavelength light source of the present invention comprises a nonlinear crystal having a periodical polarization reversal structure. The polarization reversal structure of the nonlinear crystal is divided into a plurality of regions and the polarization reversal structure and the optical axis of the fundamental wave are inclined with different angles in the respective regions, so that higher harmonic generated is divided into a plurality of beams. By dividing the higher harmonic component into a plurality of beams, it is possible to reduce the power density of the higher harmonic and generate walk off in the fundamental wave and the higher harmonic, thereby to suppress generation of the sum frequency waves of the fundamental wave and the higher harmonic so as to enhance the tolerance to high output. Therefore, SFG generation is suppressed, and a high output power coherent light source is realized.

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Kurz, J. et al, “Odd waveguide mode quasi-phase matching with angled and staggered gratings,” Optics Letters, vol. 27, No. 16, Aug. 15, 2002, pp. 1445-1447.

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