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Title: Segmented lasing tube for high temperature laser assembly

A high temperature laser assembly capable of withstanding operating temperatures in excess of 1500.degree. C. is described comprising a segmented cylindrical ceramic lasing tube having a plurality of cylindrical ceramic lasing tube segments of the same inner and outer diameters non-rigidly joined together in axial alignment; insulation of uniform thickness surround the walls of the ceramic lasing tube; a ceramic casing, preferably of quartz, surrounding the insulation; and a fluid cooled metal jacket surrounds the ceramic casing. In a preferred embodiment, the inner surface of each of the ceramic lasing tube segments are provided with a pair of oppositely spaced grooves in the wall thereof parallel to the center axis of the segmented cylindrical ceramic lasing tube, and both of the grooves and the center axis of the segmented cylindrical ceramic lasing tube lie in a common plane, with the grooves in each ceramic lasing tube segment in circumferential alignment with the grooves in the adjoining ceramic lasing tube segments; and one or more ceramic plates, all lying in a common plane to one another and with the central axis of the segmented ceramic lasing tube, are received in the grooves to provide additional wall area in the segmented ceramicmore » lasing tube for collision and return to ground state of metastable metal atoms within the segmented ceramic lasing tube.« less
Inventors:
 [1];  [2];  [3];  [4]
  1. (Danville, CA)
  2. (Tracy, CA)
  3. (Pleasanton, CA)
  4. (Livermore, CA)
Issue Date:
OSTI Identifier:
870330
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
Patent Number(s):
US 5497392
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
segmented; lasing; tube; temperature; laser; assembly; capable; withstanding; operating; temperatures; excess; 1500; degree; described; comprising; cylindrical; ceramic; plurality; segments; inner; outer; diameters; non-rigidly; joined; axial; alignment; insulation; uniform; thickness; surround; walls; casing; preferably; quartz; surrounding; fluid; cooled; metal; jacket; surrounds; preferred; embodiment; surface; provided; pair; oppositely; spaced; grooves; wall; parallel; center; axis; lie; common; plane; segment; circumferential; adjoining; plates; lying; central; received; provide; additional; collision; return; ground; metastable; atoms; common plane; axial alignment; metal atom; jacket surrounds; cylindrical ceramic; provide additional; uniform thickness; central axis; preferred embodiment; inner surface; operating temperature; operating temperatures; metal atoms; center axis; lasing tube; described comprising; outer diameter; stable metal; joining ceramic; ceramic plate; segmented ceramic; assembly capable; laser assembly; temperature laser; fluid cooled; /372/