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:
Sep. 24, 2002
Filed:
May. 03, 2001
Steven Henry Macomber, Tucson, AZ (US);
OPTO Power Corporation, Tucson, AZ (US);
Abstract
A wafer supporting a semiconductor structure having a material gain function that would preferentially support an F-P laser mode at an unwanted wavelength &lgr; is provided with a second order dielectric grating located sufficiently remotely from the high intensity optical field of the quantum well and the waveguide to receive just enough transverse mode energy to provide feedback to reduce the gain at &lgr; and support oscillation at a desired wavelength &lgr; . More particularly, by providing a gain discrimination factor &agr;≈0.1 cm , the fraction of power lost to transverse mode radiation can be held to about 1% which is sufficient to provide stabilizing feedback without sapping too much energy from the longitudinal beam.