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Wavelength conversion light source, optical element and image display device

A wavelength conversion element, laser light source technology, applied in semiconductor laser optical devices, laser monitoring devices, laser parts and other directions, can solve problems such as output reduction

Inactive Publication Date: 2012-01-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the optical element outputs light with a peak output of 500mW or more (especially 1000mW or more), a significant output drop was confirmed

Method used

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  • Wavelength conversion light source, optical element and image display device
  • Wavelength conversion light source, optical element and image display device
  • Wavelength conversion light source, optical element and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0099] image 3 It is a schematic diagram schematically showing the configuration of the wavelength conversion element and the wavelength conversion laser light source using the wavelength conversion element according to the first embodiment. use image 3 The wavelength conversion element and the wavelength conversion laser light source will be described.

[0100] image 3 Part (a) of (a) schematically shows the laser light source 200 . combine with figure 1 The laser light source 100 to be described is similarly an end-face excitation type laser light source in which excitation light PL is input from the end face of the solid-state laser medium 240 .

[0101] The laser light source 200 includes an excitation light source 210 , a collimator lens 220 , a condenser lens 230 , a wavelength conversion element 250 , and an output mirror 280 in addition to the above-mentioned solid laser medium 240 . The output light OL is output from the wavelength conversion element 250 thro...

Embodiment approach 2

[0141] Figure 7 It is a schematic diagram schematically showing the configuration of the wavelength conversion element and the wavelength conversion laser light source using the wavelength conversion element according to the second embodiment. Figure 8 yes Figure 7 A schematic perspective view of a first optical element included in the shown wavelength conversion laser light source. use Figure 7 as well as Figure 8 The wavelength conversion element and the wavelength conversion laser light source will be described.

[0142] Examples of the material of the solid laser medium included in the wavelength conversion laser light source of this embodiment include Nd:YAG laser and Nd:YVO 4 crystals. As the material of the wavelength conversion element, various nonlinear optical materials capable of forming a polarization inversion structure (for example, MgO-doped lithium niobate and MgO-doped lithium tantalate used in the wavelength conversion element of the first embodimen...

Embodiment approach 3

[0160]The wavelength converted laser light source according to this embodiment can suppress the transverse mode variation of the first optical element 300 (element including the integrated solid-state laser medium 240A and the optical contact of the wavelength conversion element 250A) described in connection with the second embodiment. As a result, according to the wavelength conversion laser light source of this embodiment, the reduction in output during long-term operation is preferably suppressed.

[0161] Figure 10 It is a schematic diagram schematically showing the structure of an optical element used in the wavelength conversion laser light source according to this embodiment. Figure 10 Part (a) of exemplifies the structure of an optical element including an integrated solid-state laser medium, a wavelength conversion element, and a maintenance mechanism for maintaining a transverse mode. Figure 10 Part (b) of exemplifies the shape of the maintaining mechanism. The ...

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Abstract

A wavelength conversion laser light source, including a solid-state laser medium configured to generate fundamental light; a wavelength conversion element configured to convert the fundamental light into second harmonic light which has a higher frequency than the fundamental light; and a conductive material in contact with the wavelength conversion element, wherein the wavelength conversion element includes a polarization inverted structure formed with a polarization inversion region, and a first lateral surface which perpendicularly intersects with the polarization inversion region, and the conductive material is in contact with the first lateral surface.

Description

technical field [0001] The invention relates to a wavelength conversion laser device which uses nonlinear optical effect to convert the wavelength of laser light emitted by a laser light source. Background technique [0002] Various wavelength conversion laser sources for obtaining visible laser or ultraviolet laser are being developed and put into practical use. Such a wavelength-converted laser light source, for example, converts from Nd:YAG laser or Nd:YVO 4 The light emitted by the laser is converted to green light which is visible light. Alternatively, a wavelength-converted laser source further converts the converted green light into ultraviolet light. These visible lasers and ultraviolet lasers are used, for example, in laser processing of substances, as light sources for laser displays, and the like. [0003] This laser light source includes Nd:YVO 4 Such as solid-state laser media and wavelength conversion components such as lithium niobate. Patent Documents 1 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/109G02F1/37
CPCH01S3/109H01S3/0617H01S3/09415H01S5/02252H01S5/005H01S3/0602H01S3/1673H01S3/0014H01S3/0627H01S3/1611H01S5/02326
Inventor 古屋博之杉田知也
Owner PANASONIC CORP