Method for producing polarization inversion part, optical wavele

Details Method for producing polarization inversion part, optical wavele Method for producing polarization inversion part, optical wavele

1998-01-12

1999-12-14

Epps, Georgia

Optical: systems and elements

Optical frequency converter

359332, G02F 135

Patent

active

060025158

ABSTRACT:
A method for manufacturing a polarization inversion part on the substrate of a ferroelectric crystal that is suitable for the use as a light wavelength conversion element or the like. A deep polarization inversion part or a homogeneous polarization inversion part is formed by one or more of: reinverting polarization in a part of the polarization inversion part; inverting polarization while applying a voltage also in the perpendicular direction to the polarization direction of a crystal; forming a low resistance part between electrodes to which an voltage is applied; inverting polarization from a electrode formed in a concave part on the surface of a substrate; applying a high voltage utilizing a insulating film; or the like. A substrate comprising a polarization inversion part manufactured by such methods is useful not only for a light wavelength conversion element but also for a diffxaction element and is also useful for a short wavelength light generator and an optical pick-up comprising a light wavelength conversion element.

REFERENCES:
patent: 5652674 (1997-07-01), Mizuuchi et al.

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