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Method for reducing laser speckle effect and method for generating the light source

A technology of laser speckle and laser light source, applied in the field of laser display light source and laser, can solve the problems of reducing speckle, the overall effect is quite far from practicality, etc.

Inactive Publication Date: 2009-05-20
SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

People have proposed using light sources of different wavelengths, superposition of pulsed lasers, moving scatterers, moving aperture diaphragms, and vibrating screens to reduce speckle, but the overall effect is still far from practical

Method used

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  • Method for reducing laser speckle effect and method for generating the light source
  • Method for reducing laser speckle effect and method for generating the light source
  • Method for reducing laser speckle effect and method for generating the light source

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Embodiment Construction

[0014] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0015] The invention uses laser pumping to obtain amplified spontaneous emission light with high beam quality, passes the amplified spontaneous emission light through a non-critical phase-matching crystal, and a waveguide structure frequency doubling crystal to obtain broad-line frequency doubling light. The wide-spectrum frequency-doubled light as a laser light source can reduce or eliminate the laser speckle effect if applied to a laser display.

[0016] refer to figure 1 , 101 is a semiconductor laser, 102 is an optical coupling system, 103 is a cavityless laser gain medium for amplifying spontaneous emission output light with high beam quality, such as a waveguide structure laser gain medium sheet, a fiber laser gain medium, 104 a converging lens, and 105 is Frequency doubler with waveguide structure, non-critical phase matching crystal.

[001...

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Abstract

The invention discloses a method for reducing the effect of laser speckle and a method for producing a laser source and relates to the laser filed, in particular the field of laser display source. The method adopts a laser pump to obtain amplified spontaneous radiating light with high beam quality; the amplified spontaneous radiating light passes through a noncritical phase matching crystal and a waveguide structure frequency doubling crystal to obtain wide-spectrum frequency doubling light. The wide-spectrum frequency doubling light is used as a laser source, is applied to laser display and can reduce or remove the speckle effect of laser. The invention provides the new method for producing the wide-spectrum frequency doubling light; and the wide-spectrum frequency doubling light is utilized as the laser source, is applied to the laser display and can reduce or remove the speckle effect of laser.

Description

technical field [0001] The invention relates to the field of lasers, in particular to the field of laser display light sources. Background technique [0002] In laser display, the laser speckle effect caused by high laser coherence seriously affects the optical quality of laser display. People have proposed to reduce speckle by using light sources of different wavelengths, superposition of pulsed lasers, moving scatterers, moving aperture diaphragms, vibrating screens, etc., but the overall effect is still far from practicality. [0003] Recently, scientists from Imperial College London proposed to make resonant cavity Nd:YVO 4 Laser design. Such as figure 1 As shown, this laser can output a highly collimated laser beam with a wave plate of 1.06 μm, a power of 30 W, and an M2 factor of 1.3. In this way, laser power and beam quality have provided a realistic basis for extracavity frequency doubling. Contents of the invention [0004] Therefore, the present invention pr...

Claims

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Application Information

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IPC IPC(8): H01S3/109
Inventor 吴砺凌吉武马英俊卢秀爱
Owner SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
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