Bidirectional light waveguide telecommunication system

Details Bidirectional light waveguide telecommunication system Bidirectional light waveguide telecommunication system

1991-09-13

1993-02-23

Coles, Sr., Edward L.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359114, 359124, 359187, H04B 1000

Patent

active

051895447

ABSTRACT:
In a bidirectional light waveguide telecommunication system comprising telecommunication equipment that each respectively comprise a laser module whose monitor diode is also used as a receiving diode, the telecommunication equipment work in frequency-division multiplex in which a modulation circuit that precedes the laser transmitting diode converts the electrical transmission signal into a frequency band other than the frequency band occupied by the electrical reception signal. A frequency separating filter that follows the monitor diode is then connected, first of all, to a reception signal demodulator and, secondly, to a control circuit for setting the operating point of the laser transmitting diode.

REFERENCES:
patent: 4061577 (1977-12-01), Bell
patent: 4726010 (1988-02-01), Ali et al.
patent: 5077619 (1991-12-01), Toms
"Optical Transceivers", pp. 551-585.
"Optical Fibres" EPO Applied Technology Series, vol. 5, 1986, pp. 552-586.
Soejima et al., "Experimental Optical Ping-Pong Transmission System", Zurich Seminar, 1986, Conf. paper B3, pp. B3.1-B3.8.
Althaus et al., "Laser-Sendemodul fur die Einmoden-Lichtwellenleitertechnik", Telcom Report, vol. 10, 1987, pp. 146-150.

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