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, 1992
Filed:
Sep. 27, 1989
Applicant:
Inventors:
Osamu Hirota, Yokohama, JP;
Hideaki Tsushima, Hachioji, JP;
Shinya Sasaki, Kodaira, JP;
Yoshitaka Takasaki, Tokorozawa, JP;
Minoru Maeda, Nishitama, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ; H04J / ;
U.S. Cl.
CPC ...
359115 ; 359173 ; 359189 ; 359190 ;
Abstract
An optical receiver includes a squeezer for changing the quantum state of a signal lightwave to a squeezed state, a slave laser put in an injection locking state by the signal lightwave outputted from the squeezer, and an optical homodyne detector for carrying out optical homodyne detection for the signal lightwave outputted from the slave laser.