Optical network unit and center of an optical communication netw

Details Optical network unit and center of an optical communication netw Optical network unit and center of an optical communication netw

1997-05-13

2000-01-04

Marcelo, Melvin

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359136, 370479, H04J 1300, H04J 1400

Patent

active

060116374

ABSTRACT:
Optical communication networks (NET) transmit bidirectionally information between a center (OLT) and a plurality of optical network units (ONU) which are connected with each other by optical fiber links. The communication network (NET) of the invention operates with composite signals consisting of reference pulses and data packets which are transmitted in the time intervals between the reference pulses. The composite signals are transmitted to all optical network units (ONU). Each optical network unit (ONU) transmits its respective data stream to the center (OLT) using the asynchronous CDMA technique by modulating the received reference pulses with the respective data stream in an electro/optical unit (S1) and encoding the modulated reference pulses in a CDMA encoder (C1) using the CDMA technique.

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Prucnal, P.R. "Ultra Fast Fiber-Optic Networks Using All-Optical Processing", Communications, 1988, ICC'88, Digital Technology-Spanning the Universe, pp. 1485-1489, Jul. 1988.
Onoda, T., et al., "A Novel Fiber-Optic Local Access System Adopting the `Service-Uniform` ONU", IEEE, pp. 606-610, Feb. 1995.
Electronic Letters, Sep. 1, 1994, vol. 30, No. 18, pp. 1506-1507, "Optical LAN using distance multiplexing and reflection modulation" by Leich et al.

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