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:
Dec. 03, 1991
Filed:
Jul. 24, 1990
William C Rideout, Townsend, MA (US);
Roger P Holmstrom, Wayland, MA (US);
Elliot Eichen, Arlington, MA (US);
William Powazinik, Marlborough, MA (US);
Joanne LaCourse, Hudson, MA (US);
John Schlafer, Wayland, MA (US);
Robert B Lauer, Stow, MA (US);
GTE Laboratories Incorporated, Waltham, MA (US);
Abstract
A monolithically integrated optical preamplifier comprises an amplifying region, an optical detection region for detecting amplified light, and an optically transparent and electrically insulating isolation region interposed between the amplifying and optical detection regions. The amplifying region achieves reduced facet reflectivity by being designed to have a large spot size, single-traverse mode waveguide amplifier oriented at an angle with respect to a crystal plane through the preamplifier. The isolation region is preferably an air gap.