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Title: Parasitic oscillation suppression in solid state lasers using absorbing thin films

Abstract

A thin absorbing film is bonded onto at least certain surfaces of a solid state laser gain medium. An absorbing metal-dielectric multilayer film is optimized for a broad range of incidence angles, and is resistant to the corrosive/erosive effects of a coolant such as water, used in the forced convection cooling of the film. Parasitic oscillations hamper the operation of solid state lasers by causing the decay of stored energy to amplified rays trapped within the gain medium by total and partial internal reflections off the gain medium facets. Zigzag lasers intended for high average power operation require the ASE absorber.

Inventors:
 [1]
  1. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
869429
Patent Number(s):
5335237
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
parasitic; oscillation; suppression; solid; lasers; absorbing; films; film; bonded; surfaces; laser; medium; metal-dielectric; multilayer; optimized; broad; range; incidence; angles; resistant; corrosive; erosive; effects; coolant; water; forced; convection; cooling; oscillations; hamper; operation; causing; decay; stored; energy; amplified; rays; trapped; total; partial; internal; reflections; facets; zigzag; intended; average; power; require; absorber; multilayer film; internal reflection; broad range; average power; stored energy; power operation; incidence angle; forced convection; convection cooling; incidence angles; internal reflections; absorbing metal; parasitic oscillation; zigzag laser; /372/

Citation Formats

Zapata, Luis E. Parasitic oscillation suppression in solid state lasers using absorbing thin films. United States: N. p., 1994. Web.
Zapata, Luis E. Parasitic oscillation suppression in solid state lasers using absorbing thin films. United States.
Zapata, Luis E. Sat . "Parasitic oscillation suppression in solid state lasers using absorbing thin films". United States. https://www.osti.gov/servlets/purl/869429.
@article{osti_869429,
title = {Parasitic oscillation suppression in solid state lasers using absorbing thin films},
author = {Zapata, Luis E},
abstractNote = {A thin absorbing film is bonded onto at least certain surfaces of a solid state laser gain medium. An absorbing metal-dielectric multilayer film is optimized for a broad range of incidence angles, and is resistant to the corrosive/erosive effects of a coolant such as water, used in the forced convection cooling of the film. Parasitic oscillations hamper the operation of solid state lasers by causing the decay of stored energy to amplified rays trapped within the gain medium by total and partial internal reflections off the gain medium facets. Zigzag lasers intended for high average power operation require the ASE absorber.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

Patent:

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