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. 02, 2002
Filed:
Feb. 10, 1999
Doyle T. Nichols, Ellicott City, MD (US);
Srinath Kalluri, Culver City, CA (US);
Michael G. Wickham, Rancho Palos Verdes, CA (US);
Timothy A. Vang, San Dimas, CA (US);
Michael P. Nesnidal, Madison, WI (US);
Robert W. Lodenkamper, Rancho Palos Verdes, CA (US);
TRW Inc., Redondo Beach, CA (US);
Abstract
A waveguide ( ) is provided having a two-dimensional optical wavelength Bragg grating ( ) embedded within a semiconductor laser medium ( ). More particularly, the waveguide ( ) includes an active region ( ) sandwiched between n-doped and p-doped cladding layers ( ). The two-dimensional Bragg grating ( ) is formed in the active region ( ). Upper and lower electrodes ( ) are defined on opposite sides of the cladding layers ( ) to complete the waveguide structure ( ). The two-dimensional grating ( ) provides simultaneous frequency selective feedback for mode control in both the longitudinal and lateral directions.