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. 12, 1998
Filed:
Nov. 13, 1996
Haruhiko Kuwatsuka, Kanagawa, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
There is provided a device comprising a distributed feedback semicon-ductor laser having .lambda./4 phase shift diffraction grating and antireflection films coated on a light input end and a light output end to transmit phase conjugate wave, a probe beam light source for injecting the probe beam into the light input end of the distributed feedback semiconductor laser, a current supplying means for supplying electric current to the distributed feedback semiconductor laser to oscillate pump beam, and a lens system for extracting phase conjugate wave which is output from the light output end of the distributed feedback semiconductor laser by injecting the probe beam into the distributed feedback semiconductor laser which is oscillating the pump beam.