Optical waveguides – With optical coupler – Plural
Patent
1996-05-01
1997-03-25
Healy, Brian
Optical waveguides
With optical coupler
Plural
385 27, 385 31, 385 39, 385 42, 385 44, 385 46, 359115, 359119, 359124, 359127, G02B 628, H04J 1400
Patent
active
056152906
ABSTRACT:
A branch device for use in an optical multiplex system allows three stations to be interconnected by a relatively small number of optical fibers. The branch device has WDM couplers each having a port A connected to a port C through a through path and to a port D through a cross path, and a port B connected to the port C through a cross path and to the port D through a through path. A signal light having a wavelength .lambda..sub.AB in a through-path wavelength band, inputted from a cable end A, is transmitted through a through path in one of the WDM couplers to a cable end B. A signal light having a wavelength .lambda..sub.AC in a cross-path wavelength band, inputted from the cable end A, is transmitted through a cross path in the WDM coupler to the B port thereof, and then transmitted through a cross path in another WDM coupler to a cable end C. Similarly, signal lights inputted from the other cable ends B, C are divided and transmitted through paths depending on their wavelengths. Stations can be connected to the branch device by transmission cables each comprising a single pair of optical fibers for bidirectional transmission of signal lights between the stations through the branch device. A repeater on each of the transmission cables may be of a single-system configuration for upstream and downstream transmission.
REFERENCES:
patent: 3883217 (1975-05-01), Love et al.
patent: 3883222 (1975-05-01), Gunderson
patent: 4072399 (1978-02-01), Love
patent: 4246475 (1981-01-01), Altman
patent: 4252402 (1981-02-01), Puech et al.
patent: 4580872 (1986-04-01), Bhatt et al.
patent: 4702550 (1987-10-01), Sano
patent: 4740050 (1988-04-01), Husain
patent: 4747651 (1988-05-01), Wiesmeier
patent: 4810052 (1989-03-01), Fling
patent: 4832434 (1989-05-01), Sauer et al.
patent: 4859019 (1989-08-01), Bevan
patent: 4909585 (1990-03-01), Kobayashi et al.
patent: 5005937 (1991-04-01), Aida et al.
patent: 5155779 (1992-10-01), Avramopoulos et al.
patent: 5282257 (1994-01-01), Ota
patent: 5315674 (1994-05-01), Asako
patent: 5414548 (1995-05-01), Tachikawa et al.
patent: 5434937 (1995-07-01), Glance
patent: 5533154 (1996-07-01), Smith
Fujiwara Haruo
Harasawa Shin-ichirou
Fujitsu Limited
Healy Brian
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