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Title: Self-seeded single-frequency laser peening method

Abstract

A method of operating a laser to obtain an output pulse having a single wavelength, comprises inducing an intracavity loss into a laser resonator having an amount that prevents oscillation during a time that energy from the pump source is being stored in the gain medium. Gain is built up in the gain medium with energy from the pump source until formation of a single-frequency relaxation oscillation pulse in the resonator. Upon detection of the onset of the relaxation oscillation pulse, the intracavity loss is reduced, such as by Q-switching, so that the built-up gain stored in the gain medium is output from the resonator in the form of an output pulse at a single frequency. An electronically controllable output coupler is controlled to affect output pulse characteristics. The laser acts a master oscillator in a master oscillator power amplifier configuration. The laser is used for laser peening.

Inventors:
 [1];  [1];  [2]
  1. Livermore, CA
  2. Rocklin, CA
Publication Date:
Research Org.:
Metal Improvement Company, LLC (Paramus, NJ); Lawrence Livermore National Security LLC (Livermore, CA)
Sponsoring Org.:
USDOE
OSTI Identifier:
1013863
Patent Number(s):
7,573,001
Application Number:
11/258,807
Assignee:
Metal Improvement Company, LLC (Paramus, NJ); Lawrence Livermore National Security LLC (Livermore, CA)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Dane, C Brent, Hackel, Lloyd, and Harris, Fritz B. Self-seeded single-frequency laser peening method. United States: N. p., 2009. Web.
Dane, C Brent, Hackel, Lloyd, & Harris, Fritz B. Self-seeded single-frequency laser peening method. United States.
Dane, C Brent, Hackel, Lloyd, and Harris, Fritz B. 2009. "Self-seeded single-frequency laser peening method". United States. https://www.osti.gov/servlets/purl/1013863.
@article{osti_1013863,
title = {Self-seeded single-frequency laser peening method},
author = {Dane, C Brent and Hackel, Lloyd and Harris, Fritz B},
abstractNote = {A method of operating a laser to obtain an output pulse having a single wavelength, comprises inducing an intracavity loss into a laser resonator having an amount that prevents oscillation during a time that energy from the pump source is being stored in the gain medium. Gain is built up in the gain medium with energy from the pump source until formation of a single-frequency relaxation oscillation pulse in the resonator. Upon detection of the onset of the relaxation oscillation pulse, the intracavity loss is reduced, such as by Q-switching, so that the built-up gain stored in the gain medium is output from the resonator in the form of an output pulse at a single frequency. An electronically controllable output coupler is controlled to affect output pulse characteristics. The laser acts a master oscillator in a master oscillator power amplifier configuration. The laser is used for laser peening.},
doi = {},
url = {https://www.osti.gov/biblio/1013863}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 11 00:00:00 EDT 2009},
month = {Tue Aug 11 00:00:00 EDT 2009}
}

Works referenced in this record:

High power, single frequency operation of a Q-switched TEM00 Mode NdYAG laser
journal, December 1981


Stable single-mode operation of a Q-switched laser by a simple resonator length control technique
journal, November 1982


High-throughput laser peening of metals using a high-average-power Nd:glass laser system
conference, January 2000


Configuration Q-switching in a diode-pumped multirod variable-configuration resonator
journal, January 1998


Laser shock‐induced microstructural and mechanical property changes in 7075 aluminum
journal, September 1972


Design and operation of a 150 W near diffraction-limited laser amplifier with SBS wavefront correction
journal, January 1995


Experimental and theoretical investigation of two-cell stimulated-Brillouin-scattering systems
journal, January 1991


Single axial mode operation of aQ-switched Nd:YAG oscillator by injection seeding
journal, February 1984


Diode-pumped monolithic Nd:YLF 1.053-μm minilaser and its application to injection seeding
conference, April 1990


Single longitudinal mode selection of high power actively Q-switched lasers
journal, August 1972