Supervisory and control signal transmitting system for use in op

Details Supervisory and control signal transmitting system for use in op Supervisory and control signal transmitting system for use in op

1993-06-01

1995-01-17

Chilcot, Jr., Richard E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359179, 359110, H04B 1002

Patent

active

053830466

ABSTRACT:
A supervisory and control signal transmitting system for use in an optically amplifying repeater system amplifies attenuated light and for transmitting data over a long distance between a transmitting station and a receiving station through a plurality of repeaters. The supervisory and control signal transmitting system comprises a sub signal superimposing portion for superimposing both a sub signal with a carrier frequency modulated by a supervisory and control signal and a modulation factor stabilizing signal with a different frequency thereof on an optical main signal modulated corresponding to transmission data, a transmitter sub signal superimposing portion for monitoring the output of the sub signal superimposing portion and for controlling the sub signal superimposing portion so as to stabilize the modulation factor of the sub signal to be superimposed, a modulating portion for receiving the output of the transmitter sub signal superimposing portion, and a stabilizing signal erasing portion for monitoring the output of the modulating portion, for extracting the frequency component of the modulation factor stabilizing signal, and for driving the modulating portion so as to erase the stabilizing signal from the output of the modulating portion.

REFERENCES:
patent: 4300239 (1981-11-01), Wakabayashi et al.
patent: 4887309 (1989-12-01), Anderson et al.
patent: 5260819 (1993-11-01), Hadjifotiou et al.

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