Data link using integrated optics devices

Details Data link using integrated optics devices Data link using integrated optics devices

1981-10-21

1984-03-13

Lee, John D.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

350 9614, 350 9615, 455612, G02B 5174

Patent

active

044363656

ABSTRACT:
A transmission link is established between remote electrical transducers, e.g., underwater, and a monitoring receiver, e.g., shore-based, over an optical fiber link using integrated optical waveguides. Optical directional couplers with absorber and reflector elements incorporated in the waveguides at respective terminals of the transmission link permit the injection of light into the fiber at the monitoring terminal and the modulation of reflected light at the transducer terminal in accordance with an electrical signal from the transducer. No electrical energy then needs to be transmitted between the monitoring and transducing terminals of the transmission link. The link itself is thus light in weight and free of electrical currents subject to electromagnetic interference.

REFERENCES:
patent: 4012113 (1977-03-01), Kogelnik et al.
patent: 4165150 (1979-08-01), Duck et al.
patent: 4182935 (1980-01-01), Chown
patent: 4264126 (1981-04-01), Sheem
patent: 4320475 (1982-03-01), Leclerc et al.
patent: 4330170 (1982-05-01), Johnson et al.
Minemura et al., "Two-Way Transmission Experiments Over a Single . . . ", Electr. Lett., vol. 14, No. 11, May 1978, pp. 340-342.
Kaminow et al., "Modulation Techniques", Optical Fiber Telecommunications, Academic Press, 1979, Chap. 17, pp. 557-582.
Drake, "Low Reflectance Terminations and Connections for Duplex . . . ", Applied Optics, vol. 20, No. 9, May 1981, pp. 1640-1644.

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