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:
Apr. 09, 1985
Filed:
Jan. 03, 1984
Graham A Garcia, San Diego, CA (US);
Steven J Cowen, San Diego, CA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An improvement for a semiconductor laser allows the facet reflectivity to be modified to compensate for the presence of a liquid or transparent solid medium having an index of refraction n.sub.m. A first dielectric coating is disposed on an end-facet of the semiconductor laser and has an index of refraction n.sub.1. A second dielectric coating is disposed on the first dielectric coating and has an index of refraction n.sub.2. The materials of the dielectric coatings are selected such that the fraction n.sub.1 /n.sub.2 =.sqroot.n.sub.m. Thus the problems associated with reductions of laser facet reflectivity due to being in contact with a surrounding medium which optically is very different from air is overcome.