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

1998-12-15

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

385 24, 359161, H04J 1402

Patent

active

058503013

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
patent: 5469288 (1995-11-01), Onaka et al.
patent: 5629995 (1997-05-01), Duck et al.

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