Wavelength multiplexed light transfer unit and wavelength multip

Details Wavelength multiplexed light transfer unit and wavelength multip Wavelength multiplexed light transfer unit and wavelength multip

1996-07-26

1998-08-11

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Plural

385 16, 385 31, 359127, 359124, G02B 628

Patent

active

057939080

ABSTRACT:
A branch circuit is formed by forming an optical filter by means of connecting a wavelength selective reflector to between two units of directional coupler and further assembling three units of the optical filter. In the branch circuit, the three optical filters are connected to each other so that the light coming in from a first optical filter is outputted to a third optical filter when the wave length selective reflector reflects the light, and to a second optical filter when the wavelength selective reflector passes the light therethrough; the light coming in from the second optical filter is outputted to the first optical filter when the wavelength selective reflector reflects the light, and to the third filter when the wavelength selective reflector passes the light therethrough; and also the light coming in from the third optical filter is outputted to the second optical filter when the wavelength selective reflector reflects the light and to the first optical filter when the wavelength selective reflector passes the light therethrough.

REFERENCES:
patent: 4799797 (1989-01-01), Huggins
patent: 4900119 (1990-02-01), Hill et al.
patent: 5050952 (1991-09-01), Fussgager
Noboru Ooyama & Morii Kuwabara "Optical Submarine Cable Communications" 1991 (No month).
Matthew S. Goodman, et al "The Lambdanet Multiwavelength Network: Architecture, Applications, and Demonstrations" IEEE Journal on Selected Areas in Communiations, Aug. 1990. No month.

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