Optical communication system for the subscriber area

Details Optical communication system for the subscriber area Optical communication system for the subscriber area

1990-04-17

1993-04-13

Coles, Sr., Edward L.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359133, H04J 1402

Patent

active

052027805

ABSTRACT:
A group of subscribers serviced from a center has a common remote distribution unit located in its vicinity. The subscribers are connected to this remote distribution unit by individual lines, preferably optical waveguides. A single optical waveguide connects the center to the remote distribution unit. Subscriber-assigned signals with subscriber-assigned wavelengths and signals to be distributed to all subscribers in the direction from the center to the subscribers are transmitted as a multiplexed optical signal, using wavelength-division multiplexing, to the remote distribution unit. The optical signal containing the signals to be distributed is separated out at the remote distribution unit and is distributed by optical means to the subscribers. The subscriber-assigned signals are also separated in the remote distribution unit into individual signals and are transmitted to the subscribers over individual lines. In the opposite direction from the subscribers to the center, the signals to be transmitted from the subscribers to the center are also transmitted over the individual lines with subscriber-assigned wavelength to the remote distribution unit where they are grouped into an optical multiplexed signal and are transmitted to the center over an optical waveguide. A suitable selection of the wavelengths makes possible a simple multiplexed formation and multiplexed resolution of the various signals.

REFERENCES:
A paper from the IEEE Proceedings Global Telecommunications Conference, entitled "A Passive Photonic Loop Architecture Employing Wavelength-Division Multiplexing".
"Services Integration and Multiplexing for Broad-Band Communication Systems", A. M. Ali and K. W. Fussganger, IEEE Journal on Selected Areas in Communications, vol. SAC-4, No. 4, Jul. 1986, pp. 551-564.
"Experimental Demonstration of a Passive Optical Subscriber Loop Architecture", S. S. Wagner et al, Electronics Letters, Mar. 17, 1988, vol. 24, No. 6, pp. 344-346.
Miki, T., Asatani, K., and Okano, Y., "A Design Concept on Fiber-Optic Wavelength-Division-Multiplexing Subscriber Loop System," HTG-Fachber (Germany), vol. 73, 1980.
Wong, C. L. and Patel, S. C., "Design Considerations in Fiber-optic Distribution Systems," HTG Fechber, vol. 73, pp. 125-131, 1980.

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