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Title: Method and apparatus for generating high power laser pulses in the two to six micron wavelength range

Abstract

Apparatus performs a method of generating one or more output laser pulses in a range of 2 to 6 microns. When a plurality of the output laser pulses are generated, a first output pulse has any selected wavelength within the range and a second output pulse is temporally closely spaced relative to the first output pulse and has a chosen wavelength differing from the selected wavelength. An oscillator laser cavity is provided with a tunable oscillator rod capable of generating initial laser pulses within a range of from 750 to 1000 nm, and a tuning element is coupled to the rod. A flashlamp is operable to pump the rod. For two pulse operation, the flashlamp has a given duration. A Q-switch provides the initial laser pulses upon operation of the tuning element and the flashlamp. A Raman device coupled to the rod shifts the wavelength of such initial laser pulse into the range of from 2 to 6 microns to form the output laser pulse having a wavelength within the range. For multiple pulses, a controller causes the Q-switch to provide first and second ones of the initial laser pulses, spaced by a time interval less than the given duration.more » Also, a selector coupled to the tuning element is operable within such duration to successively select the wavelength of the first output pulse and the chosen wavelength of the second initial pulse. The Raman device is responsive to each of the initial light pulses to generate radiation at first and second Stokes wavelengths, each of said the output laser pulses being radiation at the second Stokes wavelength.« less

Inventors:
 [1];  [2];  [3]
  1. Conifer, CO
  2. Evergreen, CO
  3. Bailey, CO
Publication Date:
Research Org.:
OPHIR Corp., Littleton, CO (United States)
OSTI Identifier:
870738
Patent Number(s):
US 5583877
Assignee:
Ophir Corporation (Littleton, CO)
DOE Contract Number:  
FG03-92ER81318
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; generating; power; laser; pulses; six; micron; wavelength; range; performs; output; microns; plurality; generated; pulse; selected; temporally; closely; spaced; relative; chosen; differing; oscillator; cavity; provided; tunable; rod; capable; initial; 750; 1000; nm; tuning; element; coupled; flashlamp; operable; pump; operation; duration; q-switch; provides; raman; device; shifts; form; multiple; controller; causes; provide; ones; time; interval; selector; successively; select; responsive; light; generate; radiation; stokes; wavelengths; device coupled; tuning element; wavelength range; output laser; selected wavelength; laser pulses; laser cavity; light pulses; output pulse; laser pulse; closely spaced; power laser; time interval; light pulse; micron wavelength; stokes wave; selected wave; chosen wavelength; rod cap; /372/

Citation Formats

MacPherson, David C, Nelson, Loren D, and O'Brien, Martin J. Method and apparatus for generating high power laser pulses in the two to six micron wavelength range. United States: N. p., 1996. Web.
MacPherson, David C, Nelson, Loren D, & O'Brien, Martin J. Method and apparatus for generating high power laser pulses in the two to six micron wavelength range. United States.
MacPherson, David C, Nelson, Loren D, and O'Brien, Martin J. 1996. "Method and apparatus for generating high power laser pulses in the two to six micron wavelength range". United States. https://www.osti.gov/servlets/purl/870738.
@article{osti_870738,
title = {Method and apparatus for generating high power laser pulses in the two to six micron wavelength range},
author = {MacPherson, David C and Nelson, Loren D and O'Brien, Martin J},
abstractNote = {Apparatus performs a method of generating one or more output laser pulses in a range of 2 to 6 microns. When a plurality of the output laser pulses are generated, a first output pulse has any selected wavelength within the range and a second output pulse is temporally closely spaced relative to the first output pulse and has a chosen wavelength differing from the selected wavelength. An oscillator laser cavity is provided with a tunable oscillator rod capable of generating initial laser pulses within a range of from 750 to 1000 nm, and a tuning element is coupled to the rod. A flashlamp is operable to pump the rod. For two pulse operation, the flashlamp has a given duration. A Q-switch provides the initial laser pulses upon operation of the tuning element and the flashlamp. A Raman device coupled to the rod shifts the wavelength of such initial laser pulse into the range of from 2 to 6 microns to form the output laser pulse having a wavelength within the range. For multiple pulses, a controller causes the Q-switch to provide first and second ones of the initial laser pulses, spaced by a time interval less than the given duration. Also, a selector coupled to the tuning element is operable within such duration to successively select the wavelength of the first output pulse and the chosen wavelength of the second initial pulse. The Raman device is responsive to each of the initial light pulses to generate radiation at first and second Stokes wavelengths, each of said the output laser pulses being radiation at the second Stokes wavelength.},
doi = {},
url = {https://www.osti.gov/biblio/870738}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {1}
}

Works referenced in this record:

High-efficiency pulse compression with intracavity Raman oscillators
journal, January 1983


Flashlamp pumped Cr:LiSrAlF 6 laser
journal, January 1991


An improved Raman LIDAR system for the remote measurement of natural gas releases into the atmosphere
journal, June 1990


Gain measurements and average power capabilities of Cr^3+:LiSrAlF_6
journal, January 1993


Wavelength dependence of raman scattering cross sections from 200-600 nm
conference, January 1983


High-efficiency pulse compression with intracavity Raman amplifiers
journal, July 1984


Stimulated Raman scattering in the visible with a multipass cell
journal, July 1989


Efficient Raman energy extraction in HD
journal, January 1990


Quantum statistics of the gain-narrowed Raman linewidth in H 2
journal, December 1990


Electronically tuned diode-laser-pumped Cr:LiSrAlF_6 laser
journal, January 1992


High-efficiency pulse compression with externally pumped intracavity Raman oscillators
journal, January 1984