skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Laser utilizing a gaseous lasing medium and method for operating the same

Abstract

The invention relates to an improvement in gas lasers and a method of operating the same. In one aspect, the invention is an improved method for operating a high-power gas laser. The improvement comprises introducing the gas lasing medium tangentially to the laser tube at a pressure establishing a forced vortex in the tube. The vortex defines an axially extending core region characterized by a low pressure and temperature relative to the gas inlet and the exterior of the vortex. An electrical discharge is established in the core region to initiate lasing of the gas. The gas discharge from the tube is passed through a diffuser. As in conventional gas lasers, firing results in a very abrupt increase in gas temperature and in severe disruption of the gas. However, the gas vortex almost immediately restores the gas to its pre-firing condition. That is, almost all of the waste heat is transferred radially to the laser wall, and the original gas-flow pattern is restored. As a result, the power output of the laser is increased significantly, and the laser firing repetition rate is markedly increased.

Inventors:
 [1]
  1. Harriman, TN
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
865988
Patent Number(s):
4612646
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
laser; utilizing; gaseous; lasing; medium; method; operating; relates; improvement; gas; lasers; aspect; improved; high-power; comprises; introducing; tangentially; tube; pressure; establishing; forced; vortex; defines; axially; extending; core; region; characterized; temperature; relative; inlet; exterior; electrical; discharge; established; initiate; passed; diffuser; conventional; firing; results; abrupt; increase; severe; disruption; immediately; restores; pre-firing; condition; waste; heat; transferred; radially; wall; original; gas-flow; pattern; restored; result; power; output; increased; significantly; repetition; rate; markedly; gas temperature; original gas; comprises introducing; gas lasers; electrical discharge; waste heat; power output; repetition rate; gas inlet; improved method; laser tube; improvement comprises; gas laser; lasing medium; core region; gas discharge; axially extending; flow pattern; conventional gas; gas lasing; laser utilizing; temperature relative; increased significantly; gaseous lasing; power gas; /372/

Citation Formats

Zerr, Bruce A. Laser utilizing a gaseous lasing medium and method for operating the same. United States: N. p., 1986. Web.
Zerr, Bruce A. Laser utilizing a gaseous lasing medium and method for operating the same. United States.
Zerr, Bruce A. Wed . "Laser utilizing a gaseous lasing medium and method for operating the same". United States. https://www.osti.gov/servlets/purl/865988.
@article{osti_865988,
title = {Laser utilizing a gaseous lasing medium and method for operating the same},
author = {Zerr, Bruce A},
abstractNote = {The invention relates to an improvement in gas lasers and a method of operating the same. In one aspect, the invention is an improved method for operating a high-power gas laser. The improvement comprises introducing the gas lasing medium tangentially to the laser tube at a pressure establishing a forced vortex in the tube. The vortex defines an axially extending core region characterized by a low pressure and temperature relative to the gas inlet and the exterior of the vortex. An electrical discharge is established in the core region to initiate lasing of the gas. The gas discharge from the tube is passed through a diffuser. As in conventional gas lasers, firing results in a very abrupt increase in gas temperature and in severe disruption of the gas. However, the gas vortex almost immediately restores the gas to its pre-firing condition. That is, almost all of the waste heat is transferred radially to the laser wall, and the original gas-flow pattern is restored. As a result, the power output of the laser is increased significantly, and the laser firing repetition rate is markedly increased.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

Patent:

Save / Share: