Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2006-08-22
2006-08-22
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Input/output coupler
C385S028000, C385S039000
Reexamination Certificate
active
07095924
ABSTRACT:
An optical filter comprises a first mode converter converting an incident light signal propagating in an incident mode into a signal propagating in a propagation mode LPnm of order higher than that of said incident mode; a second mode converter converting the light signal of higher propagation order LPnm into a signal propagating in the incident propagation mode; and a slanted Bragg grating disposed between said first and second mode converters and adapted to couple the higher propagation order light signal LPnm in back-propagation into said incident mode. The filter is applicable to flattening gain and to multiplexing DWDM signals.
REFERENCES:
patent: 5717798 (1998-02-01), Strasser et al.
patent: 6578388 (2003-06-01), Kewitsch et al.
patent: 197 27 125 (1999-01-01), None
De Barros Carlos
Molina Marianne
Riant Isabelle
Alcatel
Mooney Michael P.
Sughrue & Mion, PLLC
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