Method and system for homogenizing diode laser pump arrays

一种二极管激光、二极管的技术，应用在激励的方法/装置、激光器、控制激光器输出参数的装置等方向，能够解决不均匀等问题，达到均匀强度分布、高提取效率、提高可靠性的效果

Inactive Publication Date: 2011-03-30
LAWRENCE LIVERMORE NAT SECURITY LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although diode pumping offers significantly improved efficiency, lifetime, and reduced thermal load relative to flashlamp pumping, diode laser pump arrays typically provide anisotropic (non-uniform) illumination

Method used

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  • Method and system for homogenizing diode laser pump arrays
  • Method and system for homogenizing diode laser pump arrays
  • Method and system for homogenizing diode laser pump arrays

Examples

Experimental program
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Embodiment Construction

[0025] image 3 is a simplified plot of the laser intensity according to the position of the two modules of the diode laser array. about image 3 , shows two modules 300 each comprising an array of laser bars 110 spaced apart by a heat sink 120 . The module may be similar to the diode laser pump array 100 shown in FIG. 1 . Even with a lenslet array used to collimate the module, the intensity distribution measured vertically below the module 300 will be non-uniform. Such as image 3 As shown, the intensity distribution has peaks associated with laser bars 110, valleys associated with heat sinks 120 between the laser bars, and larger valleys between adjacent modules. image 3 The intensity distribution shown is undesirable since such a pump intensity distribution would lead to inhomogeneity in the gain distribution of the amplifier. Inhomogeneities in the gain distribution of amplifiers (or lasers) lead to lower amplifier efficiency and reduced beam quality.

[0026] to overco...

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Abstract

An optical amplifier system includes a diode pump array including a plurality of semiconductor diode laser bars disposed in an array configuration and characterized by a periodic distance between adjacent semiconductor diode laser bars. The periodic distance is measured in a first direction perpendicular to each of the plurality of semiconductor diode laser bars. The diode pump array provides a pump output propagating along an optical path and characterized by a first intensity profile measured as a function of the first direction and having a variation greater than 10%. The optical amplifier system also includes a diffractive optic disposed along the optical path. The diffractive optic includes a photo-thermo-refractive glass member. The optical amplifier system further includes an amplifier slab having an input face and position along the optical path and separated from the diffractive optic by a predetermined distance. A second intensity profile measured at the input face of the amplifier slab as a function of the first direction has a variation less than 10%.

Description

technical field [0001] The following two regular U.S. patent applications (including this application) are being filed concurrently, and the entire disclosure of the other application is incorporated by reference into this application for all purposes: [0002] ●Application No. 12 / 544,147, "Method and System for Homogenizing Diode Laser Pump Arrays," filed August 19, 2009 (Attorney Docket No. 027512-001300US); and [0003] ●Application No. 12 / 544,161, entitled "Diffractive Laser Beam Homogenizer including a Photo-Active Material and Method of Fabricating the Same," filed August 19, 2009 (Attorney Docket No. 027512-001400US) [0004] A statement of rights to inventions made under federally funded research or development [0005] The US Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the US Department of Energy and Lawrence Livermore National Security LLC. Background technique [0006] In high average power diode-pumped solid-state ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/04H01S5/06H01S3/00
CPCG02B19/0009H01S3/0941G02B19/0057G02B27/0944H01S5/4025G02B19/0014G02B19/0095G02B27/0922H01S5/005
Inventor 安迪·J·贝拉米安
Owner LAWRENCE LIVERMORE NAT SECURITY LLC
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