Nonlinear optical wavelength converting device

Details Nonlinear optical wavelength converting device Nonlinear optical wavelength converting device

1996-09-09

2000-10-24

Lee, John D.

Optical: systems and elements

Optical frequency converter

G02F 135

Patent

active

061376248

ABSTRACT:
The present invention is a wavelength converting device comprising a plurality of nonlinear optical crystals for transmitting light by second harmonic generation. Each crystal piece has a crystal axis respectively and is positioned with the crystal angle satisfying a phase matching condition for second harmonic generation and so that the adjacent crystal axis is oriented in a crystallographically different way. In one embodiment, the acceptance angle .phi. in the insensitive direction becomes the same as the acceptance angle .theta. in the sensitive direction. Therefore, there is no need for gathering light to an oval shape, and maximum conversion efficiency can be obtained by gathering light with a conventional spherical lens.

REFERENCES:
patent: 3619637 (1971-11-01), Goto
patent: 4510402 (1985-04-01), Summers et al.
patent: 5047668 (1991-09-01), Bosenberg
patent: 5247389 (1993-09-01), Beausoleil
patent: 5315433 (1994-05-01), Okazaki et al.
Samanta, L. K. et a., "Technique for Enhanced Second Harmonic Output Power", Optics Communications, Vol. 76, No. 3,4, May 1, 1990, pp. 250-252.

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