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Nonlinear crystal modifications for durable high-power laser wavelength conversion

A wavelength conversion and wavelength technology, applied in nonlinear optics, lasers, laser parts, etc., can solve problems such as pollution, UV power stability damage, and lack of satisfaction

Inactive Publication Date: 2008-01-09
ELECTRO SCI IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] [0005] Most nonlinear crystals also suffer from disadvantages such as moisture absorption and / or static electricity or almost no satisfactory damage threshold
[0009] [0008] However, due to the extremely electrostatic nature of the crystal, there is a significant contamination risk for LBO bare surfaces and other exposed frequency (or wavelength) converting crystal surfaces
Especially at high UV power, contamination of the surface significantly reduces the damage threshold of the crystal, whereas surface damage impairs the stability of the UV power

Method used

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  • Nonlinear crystal modifications for durable high-power laser wavelength conversion

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Embodiment Construction

[0017] [0016] FIG. 1 is a schematic diagram of an embodiment of a laser 10 that employs a laser medium 12 and a composite wavelength conversion element 14a (the composite wavelength conversion element is generally indicated by reference 14) positioned along an optical path 16 , the optical path 16 is reflected by the return mirror 18 and the end mirrors 20 and 22 . Laser medium 12 preferably comprises a conventional solid-state maser, such as YAG, YLF, YVO 4 , YALO, sapphire, alexandrite, or CrLiSAF compositions, and preferably produces laser radiation or laser energy having an infrared (IR) fundamental wavelength. These compositions are typically doped with neodymium, ytterbium, erbium, chromium or thulium. Typical fundamental laser IR wavelengths include, but are not limited to, 750-800nm, 1064nm, 1047nm, and 1320nm. However, the skilled artisan will appreciate that various other wavelengths, such as visible wavelengths, and other laser media or laser types may be employed...

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Abstract

A wavelength converter (34) such as a nonlinear crystal has an angle cut exit surface (36) to separate a harmonic wavelength from a fundamental or different harmonic wavelength. A solid optical overlay medium (28) has an entrance surface (38) that is angle cut to mate with the converter exit surface (36). The optical overlay medium (28) is substantially transparent to the fundamental and selected harmonic wavelengths, has a refractive index similar to that of the wavelength converter (34), and has damage thresholds at the selected wavelengths that are greater than the respective damage thresholds of the wavelength converter (34).

Description

[0001] copyright mark [0002] 【0001】2005 Electro Scientific Industries, Inc. (Electro Scientific Industries, Inc.). Portions of the disclosure of this patent document include material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of this patent document or patent disclosure, as if it were a corresponding file or record in the USPTO, but otherwise reserves all copyright rights. 37 CFR §1.71(d). technical field [0003] [0002] The present invention relates to high power laser wavelength conversion, and more particularly to the improvement of nonlinear crystals to facilitate durability. Background of the invention [0004] [0003] Laser systems are used in a variety of applications including communications, medicine, and micromachining. These applications utilize a variety of laser wavelengths and output powers. However, the available laser wavelengths are limited by the emissive properties of a small ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/109G02F1/35
CPCH01S3/109G02F1/3501H01S3/10
Inventor Y·孙R·S·哈里斯
Owner ELECTRO SCI IND INC