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:
Oct. 27, 1981
Filed:
Aug. 23, 1979
Applicant:
Inventors:
John C Dyment, Kanata, CA;
Kiuchi D Chik, Nepean, CA;
Assignee:
Northern Telecom Limited, Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
331 / ; 331 / ; 350 9611 ;
Abstract
Semiconductor lasers exhibit transient relaxation oscillations on start-up and specific lasers often exhibit sustained spontaneous pulsations caused probably by crystalline defects. These fluctuations are suppressed by coupling laser emission into a 0.3 to 2 cm. length of waveguide and coupling light reflected from the end of the waveguide back into the laser. Embodiments disclosed include one utilizing a length of optical fibre, while others are integrated optical structures.