Bidirectional optically powered signal transmission apparatus
First Claim
1. A bidirectional optically powered signal transmission apparatus, comprising:
- first and second optical transmission stations;
first means, in said first optical transmission station, for sending a first signal light beam over a first optical transmission path to said second optical transmission station;
second means, in said first optical transmission station, for receiving a second signal light beam sent over said first optical transmission path from said second optical transmission station;
third means, in said second optical transmission station, for sending said second signal light beam to said first optical transmission station over said first optical transmission path;
fourth means, in said second optical transmission station, for receiving said first signal light beam sent from said first optical transmission station;
fifth means, in said first optical transmission station, for sending a power light beam to said second optical transmission station over a second optical transmission path, distinct from said first optical transmission path;
sixth means, in said second optical transmission station, for receiving said power light beam sent from said first optical transmission station and for converting said power light beam to electric power for powering said second optical transmission station; and
said first and second signal light beams having different wavelengths.
1 Assignment
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Accused Products
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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Citations
20 Claims
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1. A bidirectional optically powered signal transmission apparatus, comprising:
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first and second optical transmission stations; first means, in said first optical transmission station, for sending a first signal light beam over a first optical transmission path to said second optical transmission station; second means, in said first optical transmission station, for receiving a second signal light beam sent over said first optical transmission path from said second optical transmission station; third means, in said second optical transmission station, for sending said second signal light beam to said first optical transmission station over said first optical transmission path; fourth means, in said second optical transmission station, for receiving said first signal light beam sent from said first optical transmission station; fifth means, in said first optical transmission station, for sending a power light beam to said second optical transmission station over a second optical transmission path, distinct from said first optical transmission path; sixth means, in said second optical transmission station, for receiving said power light beam sent from said first optical transmission station and for converting said power light beam to electric power for powering said second optical transmission station; and said first and second signal light beams having different wavelengths.
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2. A bidirectional optically powered signal transmission apparatus, comprising:
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first and second optical transmission stations; first means, in said first optical transmission station, for sending a first light beam over an optical transmission path to said second optical transmission station; second means, in said first optical transmission station, for receiving a second light beam sent from said second optical transmission station; said first light beam including an AC signal component superimposed on a DC power component; third means, in said second optical transmission station, for sending said second light beam to said first optical transmission station over said optical transmission path; fourth means, in said second optical transmission station, for receiving said first light beam sent from said first optical transmission station; fifth means, in said second optical transmission station, for converting said DC power component to an electric power for powering said second optical transmission station and for converting said AC signal component to a first electric signal for controlling said second optical transmission station; said first means including first light source means for radiating said first light beam of a first predetermined wavelength, and driving means for regulating said AC component; said third means including second light source means for radiating said second light beam of a second predetermined wavelength; and said second predetermined wavelength being different from said first predetermined wavelength. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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10. A bidirectional optically powered signal transmission apparatus, comprising:
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first and second optical transmission stations; first means, in said first optical transmission station, for sending a first light beam on an optical transmission path to said second optical transmission station; second means, in said first optical transmission station, for receiving a second light beam sent from said second optical transmission station; said first light beam including a signal light and a power light; third means, in said second optical transmission station, for sending said second light beam to said first optical transmission station over said optical transmission path; fourth means, in said second optical transmission station, for receiving said first light beam sent from said first optical transmission station; fifth means, in said second optical transmission station, for converting said power light to an electric power for powering said second optical transmission station and for converting said signal light to a first electric signal for controlling said second optical transmission station; said first means including first light source means for radiating said first light beam of a first predetermined wavelength and driving means for modulating an intensity of said power light at a first predetermined period and for modulating an intensity of said signal light at a second predetermined period, said second predetermined period being shorter than said first predetermined period; said third means including second light source means for radiating said second light beam of a second predetermined wavelength; and said second predetermined wavelength being different from said first predetermined wavelength. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A bidirectional optically powered signal transmission apparatus, comprising:
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a control station; a field station; means in said control station for sending a first light beam of a first predetermined wavelength on an optical transmission path to said field station; said first light beam including an AC signal light component and a DC power light component; an intensity of said DC power light component being modulated at a first predetermined period and an intensity of said AC signal light component being modulated at a second predetermined period, said second predetermined period being shorter than said first predetermined period; means in said control station for receiving a second light beam sent from said field station; means in said field station for sending said second light beam at a second predetermined wavelength to said control station over said optical transmission path; means in said field station for receiving said AC signal light component and said DC power light component sent from said control station; means in said field station for converting said DC power light component to an electric power for powering said field station and for converting said AC signal light component to a control signal for controlling said field station; and said second predetermined wavelength being different from said first predetermined wavelength.
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Specification