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. 24, 1985
Filed:
Sep. 21, 1983
Hans-Hermann Witte, Munich, DE;
Manfred Rohler, Munich, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
A coupler network for coupling N subscriber transmitters to N (=n.multidot.m) subscriber receivers is disclosed. The system exhibits m star couplers each having respectively N transmitter-side input ports for the connection of the N subscriber transmitters and having respectively N receiver-side output ports for connection with respectively N/m subscriber receivers of the N subscriber receivers. In order to reduce the line attenuation of this echo-free coupler network, each subscriber transmitter is connected to a plurality of star coupler input ports and a detector of each star coupler receiver is connected to a plurality of star coupler output ports. A lens system or a fiber taper which make it possible for more light to be coupled in or out (than for individual fibers) is employed for coupling a plurality of star coupler input ports to a subscriber transmitter and/or for coupling a plurality of star coupler output ports to a detector of a subscriber receiver. The specific case N=64, m=4 is illustrated in the drawing.