Laser light source and laser projector having same

A technology of laser light source and light source, which is applied in the direction of lasers, laser devices, laser components, etc., and can solve the problem of large installation space for optical filters

Active Publication Date: 2021-05-07
科安德有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, optical filters used for this purpose generally require a lot of installation space

Method used

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  • Laser light source and laser projector having same
  • Laser light source and laser projector having same
  • Laser light source and laser projector having same

Examples

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Comparison scheme
Effect test

Embodiment Construction

[0059] 1a highly schematically shows an exemplary structure of a laser light source 1 with a pump laser source 2 in the form of a diode laser, a nonlinear optical medium in the form of a nonlinear optical crystal 3 and a seed light source 4. In the example shown, the pump laser source 2 is designed to generate a pump laser beam 5 with a pump wavelength of 375 nm or greater. For visualization applications using the parametric down conversion (PDC) process, the pump wavelength λ P should not be chosen to be too large and should be smaller than about 460nm or about 450nm.

[0060]The pump laser beam 5 is coupled into the nonlinear crystal 3 , more precisely into a waveguide 6 formed in the nonlinear crystal. The waveguide 6 can be created in the nonlinear crystal 3 by eg particle implantation or titanium diffusion. In the example shown, the nonlinear crystal 3 involves periodically poled lithium niobate (Ti:PPLn) with diffused titanium. Important for the choice of nonlinear cr...

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Abstract

The invention relates to a laser light source (1), comprising at least one nonlinear optical medium (3), in particular one nonlinear crystal, and at least one pump laser source (2) for producing a pump laser beam (5) in order to form a signal beam (7) and an idler beam (8) in the nonlinear optical medium (3) by parametric down-conversion. The laser light source (1) comprises at least one seed light source (4) for producing a seed signal beam (7') and / or a seed idler beam having a coherence length smaller than the coherence length of the pump laser beam (5), and at least one superposing device (16) for superposing the seed signal beam (7') and / or the seed idler beam with the pump laser beam (5) for joint coupling into the nonlinear optical medium (3). The invention further relates to a laser projector having a laser light source (1) of this type.

Description

technical field [0001] The invention relates to a laser light source comprising: at least one nonlinear optical medium, in particular a nonlinear crystal; at least one pump laser source for generating a pump laser beam to be converted in the nonlinear A signal beam and an idler beam are formed in an optical medium. The invention also relates to a laser projector with such a laser light source. Background technique [0002] Light sources that produce light with high intensity, color fidelity, concentration, and suitable coherence are especially beneficial for visualization applications, such as projectors. For visualization applications, especially projectors, light sources that produce incoherent light, such as lamps or LEDs, are often used. However, the intensity, color fidelity and beam concentration of such light sources have disadvantages. Laser light sources are advantageous in all the respects mentioned, but they emit strongly coherent light, which in the applicatio...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04N9/31G02F1/39H01S3/10H01S3/23
CPCH04N9/3161G03B21/2033G02F1/3532G02F1/3558G02F1/3553H04N9/3173G02B27/48G02F1/39G03B21/208H01S3/0014H01S3/04H01S3/0623H01S3/063H01S3/094H01S3/1083
InventorM·弗奇S·亨格斯巴赫
Owner科安德有限公司