Optical waveguides – With optical coupler – Plural
Patent
1997-12-04
1999-11-30
Ngo, Hung N.
Optical waveguides
With optical coupler
Plural
G02B 628
Patent
active
059956895
ABSTRACT:
Disclosed is an optical divider with three input ports and three output ports for dividing an optical signal, which has: three base circuits, each of which having a first optical coupler which is connected to a predetermined input port of the three input ports and outputs a first optical signal and a second optical signal by dividing an optical signal to be input to the predetermined input port in two directions, an optical switch which has two optical signal inputs and one optical signal output which is connected to an output port of the three output ports which is paired with the predetermined input port and selects either of two optical signal to be input to the two optical signal inputs by using the first optical signal as a selection signal to output it from the optical signal output, and a second optical coupler where the second optical signal is input and then is further divided into a third optical signal and a fourth optical signal in two directions; wherein the third and fourth optical signals of one of the three base circuits are individually input to one of the two optical signal inputs of an optical switch in two base circuits other than the one of the three base circuits.
REFERENCES:
patent: 5170273 (1992-12-01), Nishio
patent: 5319485 (1994-06-01), Yasui et al.
patent: 5450224 (1995-09-01), Johansson
patent: 5537239 (1996-07-01), Sotom et al.
patent: 5566014 (1996-10-01), Glance
patent: 5841556 (1998-11-01), Hong et al.
NEC Corporation
Ngo Hung N.
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