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A semiconductor laser

A laser and semiconductor technology, which is applied in the direction of semiconductor lasers, lasers, laser components, etc., can solve the problem of poor laser directionality and achieve the effect of increasing the number of modes

Active Publication Date: 2022-07-19
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, low coherence is the main attack direction of scientific researchers. Many low coherence lasers have been designed, but the directionality of this type of laser is very poor.

Method used

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  • A semiconductor laser
  • A semiconductor laser
  • A semiconductor laser

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Embodiment Construction

[0022] The present invention provides a semiconductor laser, which can increase the number of modes by introducing a deformed mushroom-shaped cavity, so as to weaken the coherence of the laser light to reduce the influence of laser speckle on the display; Circular scattering point and light-emitting surface, virtual elliptical cavity, ensure that the light-emitting surface is an elliptical arc surface, the center of the cross-section of the semicircular scattering point is located at the focal point of the virtual elliptical cavity, and the distance between the end point of the light-emitting surface and the center of the circle is a virtual ellipse The focal length of the cavity can be adjusted to achieve the same directionality of the light.

[0023] The invention designs a semiconductor laser with simple process, easy integration, low coherence and high directivity of electric injection, so as to solve the problem of speckle pattern in laser display and the directivity probl...

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Abstract

A semiconductor laser includes a deformed mushroom-shaped cavity, a light-emitting surface and a circular scattering point; the deformed mushroom-shaped cavity includes a connected semicircular optical resonant cavity and a rectangular-like optical resonant cavity; the light-emitting surface is an elliptical arc surface , formed on the end face of the rectangular-like optical resonator; and the cross-section of the light-emitting surface is obtained by taking the intersection of the rectangle of the rectangular-like optical resonator and an auxiliary elliptic curve; the circular scattering point is formed on the One side of the semi-circular optical resonator, and the center of the cross-section of the circular scattering point is located at the focal point of the auxiliary elliptic curve; wherein, on the cross-section of the semiconductor laser, the end point of the light-emitting surface and the circular The distance between the centers of the scattering points is the focal length of the auxiliary elliptic curve. The invention realizes multi-mode lasing and ensures the directionality of multi-mode.

Description

technical field [0001] The invention relates to the technical field of laser display, in particular to a semiconductor laser with low coherence and high directivity applied to laser display. Background technique [0002] The display technology has changed from the black and white display of the cathode ray tube at the beginning, to the color display, to the later digital liquid crystal display, and now to the popular OLED display with large size and large color gamut. Today's world is a world of rapid development of science and technology. With the maturity and stability of laser technology, a new generation of display technology - laser display has emerged. As a display light source, the laser exhibits the following absolute advantages: ultra-long life, up to 20,000 hours of continuous operation without attenuation; narrow spectral width, high color saturation can be obtained; high color gamut coverage, which can reach the visible range of the human eye More than 90% of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/10H01S5/065H01S5/068
CPCH01S5/1082H01S5/0652H01S5/068
Inventor 郑婉华徐林海王宇飞贾宇飞
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI