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Laser light source module

A laser light source, laser technology, applied in lasers, laser parts, semiconductor lasers, etc., can solve the problems of low temperature control accuracy, difficult to achieve module miniaturization, etc., and achieve the effect of high wavelength conversion efficiency

Inactive Publication Date: 2013-09-18
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the laser light source module of this type, since the thermal diffusion plate, the heater, and the temperature sensor are mounted on the same substrate surface, it is difficult to reduce the size of the module.
In addition, the temperature sensor does not detect the temperature of the wavelength conversion element, so the accuracy of temperature control is low

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0020] figure 1 It is a perspective view showing the structure of the laser light source module in Embodiment 1, figure 2 It is a side view showing the structure of the same laser light source module. image 3 It is a front view showing the configuration around the wavelength conversion element of the laser light source module viewed from the laser light emitting side. The laser light source module 100 shown in these figures has a laser light source 10 and a wavelength conversion element 1 as main structural elements, and is provided with an auxiliary mount substrate 11 on which the laser light source 10 is placed, a first heat sink 12 on which the auxiliary mount substrate 11 is placed, The heater substrate 3 on which the wavelength conversion element 1 is placed, and the second heat sink 5 on which the heater substrate 3 is placed. Moreover, the 1st heat sink 12 and the 2nd heat sink 5 are joined and integrated, and constitute one heat sink as a whole.

[0021] As the wa...

Embodiment approach 2

[0047] Figure 5 The configuration around the wavelength conversion element 1 of the laser light source module 110 according to the second embodiment is shown. about Figure 5 Among the structural elements shown are the Figure 1 ~ Figure 3 The parts common to the structural elements shown, additionally with the Figure 1 ~ Figure 3 The same reference numerals as those used in , and descriptions thereof are omitted. The laser light source module 110 is characterized in that the thermal diffusion layer 6 is used between the wavelength conversion element 1 and the heater substrate 3, and the wavelength conversion element 1 is placed on the surface of the thermal diffusion layer 6 with the waveguide side facing the thermal diffusion layer 6 side. . The thermal diffusion layer 6 is composed of, for example, a thick film layer containing highly thermally conductive particles such as silver, or a thin metal plate or metal foil mainly composed of copper.

[0048] By forming the ...

Embodiment approach 3

[0057] Figure 6 It is a perspective view showing the structure of the laser light source module 120 of the third embodiment. Figure 6 The structural elements shown in the Figure 1 ~ Figure 3 When the structural elements shown are common, the same reference numerals are used.

[0058] The laser light source module 120 is characterized in that the heater 4R is arranged between the wavelength conversion element 1 and the heater substrate 3R, and the wavelength conversion element 1 is placed on the surface of the heater 4R with the waveguide surface facing the heater 4R side. when with figure 1 When compared with the laser light source module 100 of the present invention, in the laser light source module 120, the positional relationship between the heater substrate 3 and the heater substrate 3R is reversed. The heater substrate 3R is the same member as the heater substrate 3 , and the heater 4R is the same member as the heater 4 . Since the resistance value of the heater 4R...

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Abstract

The present invention is provided with: a laser light source (10) that radiates laser light (LB); a wavelength conversion element (1) that converts the wavelength of the laser light (LB); a temperature sensor (2) carried on the first surface of the wavelength conversion element (1); a heater substrate (3) that has a ceramic as a base material and carries the wavelength conversion element (1) by affixing the second surface of the wavelength conversion element (1); and a heater (4) that is on the heater substrate (3). The heater substrate (3) and a submount substrate (11) that carries the laser light source (10) are affixed to a heat sink. By means of having a concavity (G) at a position corresponding to the projection region of the wavelength conversion element (1) and facing the substrate (3), the heat sink holds the entire wavelength conversion element at an optimal operating temperature, and it is possible to highly efficiently convert the wavelength of the laser light.

Description

technical field [0001] The present invention relates to a laser light source module including a solid-state laser that oscillates fundamental laser light and a wavelength conversion element that converts the wavelength of the fundamental laser, used in image display devices and the like. Background technique [0002] As a laser light source module, a method of converting the wavelength of laser light excited by a laser light source such as a solid-state laser through a wavelength conversion element composed of a nonlinear optical crystal (hereinafter referred to as an NLO crystal) with a periodic polarization inversion structure has been put into practical use. And proposed various laser light source modules. However, since the wavelength conversion efficiency of the NLO crystal wavelength conversion element has a large temperature dependence, it is necessary to keep the entire wavelength conversion element at a constant optimum operating temperature during use. [0003] Fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/022H01S5/024H01S5/026
CPCH01S5/0092H01S5/02446H04N9/3161F21V29/90G02F1/3546H01S5/02326
Inventor 横山彰玉谷基亮柳泽隆行
Owner MITSUBISHI ELECTRIC CORP