Wavelength conversion device, laser apparatus, image forming apparatus, and display apparatus
AssigneeRicoh Company, Ltd.
InventorsYasuhiro Higashi, Yasuhiro Satoh
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Abstract
A wavelength conversion device enabling the stable output of high-power harmonic light is disclosed. The wavelength conversion device includes MgO:LiNbO3 (PPMgLN) having a periodic polarization reversed structure, and the +Z and −Z surfaces of the PPMgLN are covered with thin chrome (Cr) film. In the PPMgLN, the incident surface and output surface are disposed on the −X side and +X side, respectively, in the longitudinal direction. Because of this structure, even when a high-power laser fundamental wave is incident, the PPMgLN can avoid destruction and damage due to the electric field, thereby enabling the stable output of high-power harmonic.
Claims13
A wavelength conversion device comprising:
- a nonlinear optical crystal having a periodic polarization reversed structure;
- and
- conductive members covering at least two regions of the nonlinear optical crystal, wherein
- a spontaneous polarization direction of the nonlinear optical crystal crosses the region.
A wavelength conversion device comprising:
- a nonlinear optical crystal having a periodic polarization reversed structure, a cross sectional shape orthogonal to the periodic direction of the polarization reversed structure being substantially a circle or an ellipse;
- and
- a conductive member covering a circumferential surface of the nonlinear optical crystal.
Dependencies are inferred from the claim text.