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:
Aug. 08, 1989
Filed:
Mar. 29, 1988
Applicant:
Inventors:
Assignee:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ; H01S / ; H01S / ;
U.S. Cl.
CPC ...
372 20 ; 372 32 ; 372 50 ; 372 96 ;
Abstract
A wavelength conversion element is disclosed, which comprises a substrate having integrated thereon close to each other a wavelength-tunable semiconductor laser portion which oscillates in a single mode and whose oscillation wavelength can be set up at a desired value within a given wavelength range by changing operational conditions, and a saturable absorption region optically connected to said wavelength-tunable semiconductor laser.