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:
Sep. 15, 1981
Filed:
Aug. 09, 1979
Shigetoki Sugimoto, Tokyo, JP;
Kouichi Minemura, Tokyo, JP;
Nippon Electric Co., Ltd., Tokyo, JP;
Abstract
There is disclosed a bidirectional optical fiber transmission system. This system includes first and second light transmitter-receiver sets and a single strand of optical fibers. The light transmitter-receiver sets each comprise (a) a light receiver, (b) a light transmitter whose light source is a light emitting diode, and (c) means to isolate downstream and upstream light from each other. The optical fibers connect the light-transmitter-receiver sets through the light isolating means. The emission spectra of the light emitting diodes at least partly overlap each other and the isolating means have wavelength pass bands which do not substantially overlap each other.