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:
Nov. 17, 1998
Filed:
Mar. 25, 1996
Applicant:
Inventor:
David Wake, Levington, GB;
Assignee:
British Telecommunications public limited company, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H04B / ;
U.S. Cl.
CPC ...
359168 ; 359167 ; 359191 ;
Abstract
An optical communication system used for the distribution of a signal includes a central station having an optical source. One or more remote stations are connected to the central station by an optical network. The central station outputs onto the network a carrier signal and an intermediate frequency signal. The remote station includes an optical mixer/detector which mixes the carrier and intermediate frequency signal both in the optical domain and outputs an RF electrical signal. The optical mixer/detector may be a heterojunction bipolar phototransistor (HBT). The optical source in the central station may be a dual-mode semiconductor laser.