Optical communications system for the subscriber area with optic

Details Optical communications system for the subscriber area with optic Optical communications system for the subscriber area with optic

1992-02-11

1994-08-09

Chilcot, Jr., Richard E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359115, 359152, 359178, 359179, 359120, 359121, H04J 1400, H04B 1000, H04B 1002

Patent

active

053371755

ABSTRACT:
Optical communications system for the subscriber area with optical amplifiers.
The system according to the invention is used to distribute information signals, particularly telephone signals, from a center to a plurality of subscribers and to make possible a bidirectional transmission of telephone and data signals between the center and the subscribers. According to the invention, the network used for this purpose is a multistar fiber-optic network in which fiber-optic amplifiers (10, 11) are present between successive branch points. The information signals to be distributed are transmitted via the fiber-optic network with a first wavelength (.lambda..sub.1) to the subscribers, and the subscriber-specific information signals to be transmitted from the center (1) to the subscribers (T.sub.i) are converted by frequency modulation to a different frequency band (FB.sub.2) than the distribution signals (by frequency modulation) and transmitted to the subscribers at the same wavelength as the distribution signals, and the subscriber-specific signals to be transmitted from the subscribers (T.sub.i) to the center (1) are converted by frequency modulation to another frequency band (FB.sub.3) and are transmitted optically to the center with a second wavelength (.lambda..sub.2). This optical signal is amplified at suitable points (A) and several alternative embodiments for this amplification are indicated.

REFERENCES:
patent: 4441180 (1984-04-01), Schussler
patent: 4506356 (1985-03-01), Krull
patent: 4525834 (1985-06-01), Schenkel et al.
patent: 4545048 (1985-10-01), Hauk et al.
patent: 4567586 (1986-01-01), Koeck
patent: 4641375 (1987-02-01), Dean
patent: 4705350 (1987-11-01), Cheng
patent: 4726010 (1988-02-01), Ali et al.
patent: 4809362 (1989-02-01), Claus et al.
patent: 4873681 (1989-10-01), Arthurs et al.
patent: 4891694 (1990-01-01), Way
patent: 4975513 (1990-11-01), Mochizuki et al.
patent: 5083874 (1992-01-01), Aida et al.
patent: 5107361 (1992-04-01), Kneidinger et al.
patent: 5202780 (1993-04-01), Fussganger
patent: 5202780 (1993-04-01), Fussganger
patent: 5212577 (1993-05-01), Nakamura et al.
Nr. 3, Jan. 25, 1991, Muuchen DE `Seiten 59-62 Miki, "Fibre to the Home": Strategien in Japan`. Funkschau Mar. 1991.
IEEE Global Telecommunications Conference, Nov. 2989, Dallas, US, Seiten 1671-1674 Rosher et al "A new approach to the provision of POTS and CATV over passive optical networks".
Electronics Letters. Bd. 27, Nr. 1, Jan. 3, 1991, Stevanage GB Seiten 89-91 Suyama et al "Bidirectional transmission scheme using intensity modulation of 1.48 um pump laser diode for erbium-doped fibre amplifier".
IEEE Technical Digest on Optical Amplifiers and Their Applications, Aug. 1990, Montery, US Seiten 232-235 Kikushima et al "Simultaneous distribution of AM/FM FDM TV signals to 65536 subscribers using 4 stage cascase EDFAs".

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