Patent
1983-05-16
1984-06-05
Lee, John D.
350 9616, G02B 5172
Patent
active
044525052
ABSTRACT:
An assembly for bidirectional signal transmission over a single fiber is disclosed together with its method of manufacture. A hot coating of dichroic material is applied to a surface of a glass substrate. The substrate is processed into dichroic wafers having larger dimensions than the cross section of the fiber with which it is employed. The dichroic wafer is positioned over the end face of a polished fiber beamsplitter and secured thereto by a thin layer of optical grade epoxy. A second polished fiber beamsplitter may than be secured in a similar manner to the opposite side of the wafer. The coated wafer forms an acute angle of about 25.degree. with a plane perpendicular to the axis of each beamsplitter half. A bidirectional coupler is thereby formed.
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Bickel et al., "Bidirectional Coupler for Full Duplex Transmission on a Single Optical Fiber", Proc. of SPIE, vol. 139, pp. 63-69, Mar. 1978.
International Telephone and Telegraph Corporation
Lee John D.
O'Halloran John T.
Seitter Robert P.
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