Optical network system

Details Optical network system Optical network system

1997-06-13

1999-08-10

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359121, 359134, 359167, 359110, H04J 1402, H04B 1008

Patent

active

059367539

ABSTRACT:
An optical network system for bidirectional transmission between a main system (e.g., central station) and a plurality of auxiliary systems (e.g., subscriber's stations). The main system outputs a main optical signal to a main fiber. The auxiliary systems output auxiliary optical signals to a plurality of auxiliary fibers, respectively. The main fiber and the auxiliary fibers are network-connected by a connecting unit. The main system has a detector for detecting the auxiliary optical signals and a control signal generator for generating a control signal including data for designating a specific auxiliary system whose auxiliary optical signal is not detected. The main optical signal in the auxiliary fiber corresponding to the specific auxiliary system is attenuated according to the control signal. Accordingly, laser hazard in each auxiliary system is prevented.

REFERENCES:
patent: 5202780 (1993-04-01), Fussganger
patent: 5469283 (1995-11-01), Vinel et al.
patent: 5812295 (1998-09-01), Kitasagami

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