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:
Jul. 16, 1996
Filed:
Mar. 30, 1995
Applicant:
Inventors:
Guo P Li, Ottawa, CA;
Toshihiko Makino, Nepean, CA;
Andrew M Sarangan, Waterloo, CA;
Weiping Huang, Waterloo, CA;
Assignee:
Northern Telecom Limited, Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 50 ; 372 20 ; 372 23 ; 372 46 ; 372 96 ;
Abstract
A multi-wavelength laser array having a plurality of gain-coupled distributed feedback ridge waveguide lasers. The operational wavelength of each laser is established by selecting a width of the ridge waveguide in the range 1.6 .mu.m to 5.2 .mu.m. Fine tuning of each central wavelength is achieved by thermal power to selected waveguides via Titanium thin film resistors integrated into the laser array. A wavelength range of 9 nm is demonstrated utilizing a sixteen element array.