Optical waveguides – With optical coupler – Plural
Patent
1996-05-31
1998-08-18
Lee, John D.
Optical waveguides
With optical coupler
Plural
359152, 359171, 359173, G02B 6293
Patent
active
057968900
ABSTRACT:
A bidirectional optically powered signal transmission apparatus includes a control station and a field station which are optically linked by an optical fiber for signal transmission and for power transmission. The control station sends a first light beam to a light receiver in the field station. The field station sends a second light beam to the control station. The first and second light beams are at different wavelengths so that simultaneous bidirectional transmission is enabled. The field station further converts a portion of the first light beam to electric power for powering the field station. The field station demodulates an AC component superimposed on the light it receives to produce an AC electric signal for control of the field station. The control and field stations include respective optical transceiver circuits, each including a light source, light receiver and light splitter-coupler. The light receiver in the control station further includes a light receiver array for converting a portion of the first light beam to electric power.
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Kaiho Naoki
Sano Yasukazu
Tsuji Nobuhiko
Fuji Electric & Co., Ltd.
Lee John D.
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