Optical communication system in the subscriber loop

Details Optical communication system in the subscriber loop Optical communication system in the subscriber loop

1986-02-25

1988-02-16

Orsino, Joseph A.

Multiplex communications

Wide area network

Packet switching

370 4, 370 50, 455612, H04B 900

Patent

active

047260106

ABSTRACT:
The invention relates to an optical communication system for transmitting subscriber-assigned information in both directions between a center (1) and a plurality of subscribers (3ato 3n), particularly to the subscriber loop of a broadband communication system. In a remote distribution facility which is of either distributed (FIG. 1) or lumped (FIG. 2) design, the optical waveguides (5ato 5n) of a group of subscribers living or working near each other are coupled to a common optical waveguide (4) (or to two common optical waveguides) connected to the center (1). Subscriber-assigned signals to be transmitted from the center to the subscribers are combined into an electric time-division-multiplex signal which is transmitted as an optical signal with a single wavelength (.lambda..sub.o) to the vicinity of the subscribers and distributed to the latter. From the electric time-division-multiplex signal, each of the subscribers takes only the signal intended for him. The signals to be transmitted from the subscribers to the center are transmitted as optical signals with subscriber-assigned wavelengths (.lambda..sub.l to .lambda..sub.n ) through subscriber-as-signed optical waveguides to the common optical waveguide (4), are coupled into the latter, and are transmitted as a wavelength-division-multiplex signal to the center.

REFERENCES:
patent: 4491983 (1985-01-01), Pinnow et al.
Wong et al.-"Design Considerations"-NTG Fachber (Germany) vol. 73, 1980, pp. 125-131.
Knick et al.-"User Capacity"-Conf: 1981 Intern. Conf. on Comm.-Denver. Colo. 14-18, Jun. 1981-pp. 5.6.1-5.6.6.
Chang-"Fiberguide Systems"-Proc. of the IEEE vol. 68 #10, Oct. 1980, pp. 1291-1299.
Dupieux et al-"Optical Fiber Technology"-Broadband Networks Electrical Communication-vol. 56 #4-1981, pp. 379-384.

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