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:
May. 02, 1989
Filed:
Mar. 21, 1988
Applicant:
Inventors:
Elias Towe, Cambridge, MA (US);
Clifton G Fonstad, Jr, Arlington, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 44 ; 372 50 ; 372 45 ;
Abstract
A method and apparatus for phase-locking semiconductor laser arrays is described wherein individual light waves propagating in adjacent waveguides are phase-locked by intercoupling the waveguides in a specific manner. The waveguides are intercoupled in an unguided mode-mixing region wherein various modes of propagation mix by diffraction. The length of this region is fixed at a distance z which produces a phase difference an integral multiple of 2.pi. between adjacent waveguides.