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Visible light semiconductor laser capable of generating broadband output

A broadband output, semiconductor technology used in the field of lasers to solve problems such as changing the temporal or spatial coherence of lasers

Inactive Publication Date: 2014-06-11
FUZHOU PHOTOP QPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in laser display, these methods are difficult to change the temporal or spatial coherence of laser light under the premise of ensuring laser power and beam quality.

Method used

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  • Visible light semiconductor laser capable of generating broadband output
  • Visible light semiconductor laser capable of generating broadband output

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: A visible light semiconductor laser with broadband output, including a visible light semiconductor laser and a heat sink. Such as figure 1 As shown, the semiconductor laser is a visible light semiconductor laser LD array 101. The heat sink includes electrodes 1021 and 1022 at both ends of the LD array and a heat sink 103 at the bottom of the LD array. The electrodes 1021 and 1022 also function as heat sinks. Wherein, the heat sink 103 can be a metal, and at this time, an insulating medium must be coated on its contact surface with one or both of the two electrodes 1021, 1022; the heat sink 103 can also be an insulating medium, such as boron nitride heat conduction ceramics, diamond ceramics, etc. In this structure, only the LDs at both ends of the LD array 101 are in contact with the heat sinks (electrodes) 1021 and 1022, so the LD array 101 generates a temperature gradient from the center to both ends in the z direction, and then the output center is gen...

Embodiment 2

[0016] Embodiment 2: A visible light semiconductor laser with broadband output, including a visible light semiconductor laser and a heat sink. Such as figure 2 As shown, the semiconductor laser includes several visible light semiconductor laser LD chips 201, and the heat sink is a ladder-shaped heat sink 203, and the specific ladder shape can be as follows figure 2 The heat sinks 2031 and 2032 are shown, and the LD chip 201 is placed on different stepped units of the heat sink 203 . Due to the different thermal conductivity of the stepped units of the heat sink 203, temperature gradients are generated, so that the LD chips placed on different stepped units generate temperature gradients, and the different temperatures of the LD chips produce outputs of different wavelengths, thereby achieving the purpose of broadband output of the entire laser. .

[0017] Further, a micro-heating resistor 202 that controls the temperature of the corresponding LD chip can be set on each ste...

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Abstract

The invention discloses a visible light semiconductor laser capable of generating a broadband output, which comprises a visible light semiconductor laser and a heat sink. For the semiconductor laser, with the rising of the temperature, the emission wavelength of the semiconductor laser generates red shift. In the invention, a plurality of layers of chips are overlapped for a visible light LD (laser diode) and are arranged on the heat sink to generate different temperature gradients; or the LD chips of the trapezoid step heat sink on different steps are adopted to generate different temperature gradients so as to generate the broadband visible light output for reducing laser coherence and finally fulfilling the aim of eliminating laser speckles. The visible light semiconductor laser capable of generating the broadband output considers from the standpoint of the wavelength. On the premise of guaranteeing the laser power and the beam quality, the laser coherence is reduced and the laser speckles are inhibited.

Description

technical field [0001] The invention relates to the laser field, in particular to a visible light semiconductor laser in the laser display field. Background technique [0002] Laser is a new type of light source, which is generated by the stimulated radiation of light, because it has the same frequency, phase, propagation direction and polarization state as the incident light, so the laser has different characteristics compared with ordinary light sources, such as laser monochromatic Good performance, good directionality, good coherence, high brightness. In addition, according to the principle of three primary colors, the laser has the largest color triangle area on the chromaticity diagram. Therefore, from the characteristics of laser and the principle of three-primary color synthesis, it can be known that laser display has a larger color gamut, higher contrast and brightness than existing displays, and the color is more vivid, which can better reflect the true colors of n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/40H01S5/024
Inventor 吴砺林江铭任策
Owner FUZHOU PHOTOP QPTICS CO LTD