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

1998-04-30

1999-01-19

Bacares, Rafael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359127, 385 24, 385 27, H04J 1402

Patent

active

058619674

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
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patent: 5050952 (1991-09-01), Fussgager
patent: 5627927 (1997-05-01), Udd
patent: 5680235 (1997-10-01), Johansson
patent: 5778118 (1998-07-01), Sridhar
Noboru Ooyama & Moriji Kuwabara "Optical Submarine Cable Communications".
Matthew S. Goodman, et al "The Lambdanet Multiwavelength Network: Architecture, Applications, and Demonstrations" IEEE Journal on Selected Areas in Communications, Aug. 1990.
Electronics Letters, Mar. 16, 1995"Wavelength reuse schone in a WDM unidirectional ring network using a proper fibre grating add/drop multiplexer" Chawki et al.

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