Passive optical telecommunication system

Details Passive optical telecommunication system Passive optical telecommunication system

1994-02-04

1996-02-13

Boudreau, Leo H.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359168, 359152, H04J 1408

Patent

active

054915759

ABSTRACT:
In a passive optical telecommunication system having a central station communicating via respective optical waveguides with a number of decentralized stations, an electrical carrier signal is DPSK-modulated in the upstream transmission, after which the electrical signal modulated in this way effects the intensity modulation of the emitted light; in the downstream signal transmission, the emitted light is intensity-modulated by a preferably scrambled NRZ baseband signal. The carrier signal is derived by frequency multiplication from the regenerated reception clock signal of the decentralized station.

REFERENCES:
patent: 5373386 (1994-12-01), Bolze
"A Hybrid Approach to the Transmission of Telephony Over a Passive Optical Network", Mudhar, Int. J. Digital and Analog Comm. Syst. vol. 5 (1992) pp. 77-83.
"Passive Fibre Local Loop for Telephony with Broadband Upgrade", Oakley et al ISSLS '88 International Symposium on Subscriber Loops and Services, pp. 9.4.1-9.4.5.
"Subcarrier Multiplexing for Multiple-Access Lightwave Networks", Darcie, J. Lightwave Tech. vol. LT-5, No. 8, Aug. 1987 (pp. 1103-1110).
"The Provision of Telephony Over Passive Optical Networks" Hoppitt et al Br. Telecom. Technol. J., vol. 7, No. 2, Apr. 1989, pp. 100-114.
"A Passive Double Star Optical Subscriber System with Frequency Division Duplex Transmission and Flexible Access", Kaede et al, IEICE Trans. Commun. vol. E75-B, No.9, Sep. 1992, pp. 841-849.
"Introduction to Communications Systems" Stremler, pp. 461-464 and 480-482.

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