Optical transmission apparatus and optical transmission system

Details Optical transmission apparatus and optical transmission system Optical transmission apparatus and optical transmission system

2004-08-24

2008-05-20

Pascal, Leslie (Department: 2613)

Optical communications

Transmitter and receiver system

Plural stations

C398S038000, C398S083000

Reexamination Certificate

active

07376355

ABSTRACT:
An optical transmission apparatus includes a return line for connecting a first transmission line and a second transmission line opposed to the first transmission line in order to make it possible to commonly use a transmitter-receiver or a repeater, for example, between a trunk line and a branch line and prevent a situation that the power of branched signal lights increases excessively. The optical transmission apparatus is configured so that dummy lights inputted together with signal lights to be added to signal lights transmitted through the first transmission line are sent to the second transmission line through the return line and are outputted together with signal lights to be dropped from the second transmission line.

REFERENCES:
patent: 6204945 (2001-03-01), Iwata et al.
patent: 6233076 (2001-05-01), Iwata et al.
patent: 7123405 (2006-10-01), Yokoyama et al.
patent: 2002/0054406 (2002-05-01), Duerksen
patent: 2002/0105695 (2002-08-01), DeGrange, Jr. et al.
patent: 2002/0131696 (2002-09-01), Yokoyama et al.
patent: HEI 10-28106 (1998-01-01), None
patent: HEI 10-150433 (1998-06-01), None
French Patent Office Preliminary Search Report dated Feb. 21, 2006, in counterpart French Patent Application No. 0410000000.

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