Parasitic oscillation suppression in solid state lasers using absorbing thin films

Patent · Sat Jan 01 00:00:00 EST 1994

OSTI ID:869429

Zapata, Luis E ^[1]

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1. Livermore, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5335237
• OSTI ID: 869429
• Country of Publication: United States
• Language: English

Related Subjects

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
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