Variable group delay compensating unit and variable group...

Details Variable group delay compensating unit and variable group... Variable group delay compensating unit and variable group...

2005-02-01

2005-02-01

Toatley, Jr., Gregory J. (Department: 2877)

Optical waveguides

With optical coupler

Input/output coupler

C385S047000, C385S024000, C385S027000

Reexamination Certificate

active

06850668

ABSTRACT:
A variable group delay unit has a light multiple reflector for receiving incident light and generating output light at varied output angles depending on wavelengths, a light returning part for returning the output light to the light multiple reflector, and a slit member which is provided between the light multiple reflector and the light returning part. Only light of a necessary degree is transmitted through the slit member and is reflected to a light reflecting element. A method for designing an opening width of the slit member and a method for arranging the slit member are established.

REFERENCES:
patent: 3739295 (1973-06-01), Shah
patent: 4652080 (1987-03-01), Carter et al.
patent: 5548669 (1996-08-01), Anderson et al.
patent: 5649037 (1997-07-01), Ohyama et al.
patent: 5930045 (1999-07-01), Shirasaki
patent: 6188705 (2001-02-01), Krainak et al.
patent: 6310993 (2001-10-01), Cao et al.

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