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Wavelength conversion element and wavelength conversion laser device

A wavelength conversion and laser technology, applied in the direction of lasers, electrical components, laser components, etc., can solve problems such as small tolerances

Active Publication Date: 2012-12-26
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the QPM wavelength conversion element, the tolerance (phase matching bandwidth) of the phase matching condition with respect to the wavelength of the fundamental wave and the temperature of the wavelength conversion element is small.

Method used

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  • Wavelength conversion element and wavelength conversion laser device
  • Wavelength conversion element and wavelength conversion laser device
  • Wavelength conversion element and wavelength conversion laser device

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Embodiment approach

[0031] figure 1 It is a cross-sectional view of the structure of the wavelength conversion laser device according to the embodiment of the present invention observed from the side direction, figure 2 It is a plan view showing the configuration of the wavelength conversion laser device according to the embodiment of the present invention. In addition, in figure 1 with figure 2 In , the optical axis indicating the laser oscillation direction is shown as the optical axis 6 .

[0032] The planar waveguide type wavelength conversion laser device 100 is a laser oscillator that gradually changes the pitch of the polarization inversion cycle so that the fundamental wave that oscillates in a plurality of laser oscillation modes (0-order mode, 1-order mode, etc.) can be wavelength-converted. device. The wavelength conversion laser device 100 is used, for example, as a light source of a laser display device or an optical memory device in the field of optical information processing ...

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Abstract

A wavelength converting element that is of a planar waveguide type, includes a plate-like nonlinear optical material, and performs a wavelength conversion on a fundamental wave of a laser beam by propagating the fundamental wave in a plurality of laser oscillation modes in a direction perpendicular to a plate-like main surface, the direction being perpendicular to an optical axis, wherein periods of polarization inversions of the nonlinear optical material are changed so that each of the periods has a width of a phase matching band A that includes phase matching conditions of at least two of the plurality of laser oscillation modes and so that a non-polarization-inversion region and a polarization inversion region are formed in the nonlinear optical material.

Description

technical field [0001] The present invention relates to a wavelength conversion element and a wavelength conversion laser device for converting the wavelength of laser light in a planar waveguide. Background technique [0002] In devices that display color images such as printers and projection televisions, light sources of three colors, R (red), G (green), and B (blue), need to be used as light sources. In recent years, as these light sources, wavelength conversion laser devices (laser oscillators) have been developed that use laser light in the 900nm band, 1 μm band, and 1.3 μm band as the fundamental laser beam, and convert the fundamental laser beam to half the wavelength using a nonlinear material. (Twice the frequency) of the second harmonic (SHG (Second Harmonic Generation)). [0003] In the SHG, in order to efficiently extract laser light having a desired wavelength, it is necessary to achieve high conversion efficiency from fundamental wave laser light to second ha...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/37H01S3/06H01S3/109
CPCH01S3/0092G02F1/3775G02F1/3544
Inventor 小矢田康晴柳泽隆行山本修平平野嘉仁永塚勉
Owner MITSUBISHI ELECTRIC CORP