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Wavelength Beam Combining Laser System Utilizing Prisms for Beam Quality Improvement and Bandwidth Reduction

A laser system and beam combination technology, applied in the field of laser systems, can solve the problems of reducing feedback uniformity, diffracted beam waist misalignment, etc.

Active Publication Date: 2020-04-28
PANASONIC OF NORTH AMERICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different incident angles may also lead to severe misalignment of the waist of the diffracted beam and thus reduce feedback uniformity and WBC resonator efficiency
[0007] Also, since WBC systems require different transmitters to operate at different wavelengths, the available wavelength bandwidth of the source array can be a critical resource

Method used

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  • Wavelength Beam Combining Laser System Utilizing Prisms for Beam Quality Improvement and Bandwidth Reduction
  • Wavelength Beam Combining Laser System Utilizing Prisms for Beam Quality Improvement and Bandwidth Reduction
  • Wavelength Beam Combining Laser System Utilizing Prisms for Beam Quality Improvement and Bandwidth Reduction

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Embodiment Construction

[0036] figure 1 A typical conventional layout of a wavelength beam combining (WBC) resonator 100 in the WBC dimension is shown. The resonator 100 has a plurality of emitters 102 , 104 , 106 , a transformation lens 108 with a focal length f1 , a diffraction grating 110 , a telescopic lens set featuring lenses 112 , 114 , and a partially reflective output coupler 116 . Although in figure 1 and other figures not shown, the emitter may have microlenses attached to it for reducing the initial large divergence and for beam shaping and orientation. Transform lens 108 is generally positioned confocally with emitter and grating 110 . The lens 108 collimates the individual emitters and converges the emitter chief rays to the center of the grating 110, particularly in the WBC dimension. The chief rays of emitters 102, 104, 106 are labeled 118, 120, and 122, respectively. Such as figure 1 As shown, the emitters 102, 104, 106 form the source array of the WBC resonator 100, which ha...

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Abstract

In various embodiments, one or more prisms are utilized in a wavelength beam combining laser system to adjust beam size and / or provide narrower wavelength bandwidth.

Description

[0001] related application [0002] This application claims the benefit and priority of U.S. Provisional Patent Application No. 62 / 280,964, filed January 20, 2016, the entire disclosure of which is incorporated herein by reference. technical field [0003] In various embodiments, the present invention relates to laser systems, particularly wavelength beam combining laser systems with improved beam quality and narrow wavelength bandwidth. Background technique [0004] High power laser systems are used in many different applications such as welding, cutting, drilling and material processing. Such laser systems typically include a laser transmitter from which laser light is coupled into an optical fiber (or simply "fiber"), and an optical system that focuses the laser light from the fiber onto the workpiece to be processed. Optical systems are typically designed to produce the highest quality laser beam, or equivalently, the beam with the lowest beam parameter product (BPP). ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/00G02B27/14G02B27/12G02B27/10
CPCG02B3/06G02B5/04G02B5/1814G02B27/141G02B2005/1804G02B5/18G02B23/00G02B27/1006G02B27/1086G02B27/0972
Inventor 周望龙B·陈D·G·德摩尔二世M·克鲁兹
Owner PANASONIC OF NORTH AMERICA