The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 1976
Filed:
Dec. 17, 1974
James C Fletcher, , US;
Charles Elachi, Pasadena, CA (US);
Other;
Abstract
For use in a waveguide gas laser a capillary tube of glass or ceramic has an inner surface defining a longitudinal capillary opening through which the laser gas flows. At least a portion of the inner surface is corrugated with corrugations or channels with a periodicity .LAMBDA. where .LAMBDA. = 1/2.lambda., .lambda. being the laser gas wavelength. The tube includes a diffused region extending outwardly from the opening. The diffused region of a depth d on the order of 1.lambda. to 3.lambda. acts as a waveguide for the waves, with the corrugations producing distributed feedback. The evanescent component of the waves travelling in the diffused region interact with the laser gas in the opening, gaining energy therefrom, and thereby amplifying the waves travelling in the diffused region, which exit the diffused region, surrounding the opening, as a beam of wavelength .lambda..