Optical waveguides – Directional optical modulation within an optical waveguide – Acousto-optic
Reexamination Certificate
2006-10-10
2006-10-10
Wells, Nikita (Department: 2881)
Optical waveguides
Directional optical modulation within an optical waveguide
Acousto-optic
C385S140000
Reexamination Certificate
active
07120321
ABSTRACT:
The present invention relates to a control method and device for an optical filter, and a primary object of the present invention is to achieve accurate tracking control of the optical filter. Disclosed herein is a control method for an optical filter including first and second optical filter units cascaded, each having an input and first and second outputs. The first output of the first optical filter unit is connected to the input of the second optical filter unit. First light output from the second output of the first optical filter unit is converted into a first electrical signal having a level corresponding to the power of the first light, and second light output from the second output of the second optical filter unit is converted into a second electrical signal having a level corresponding to the power of the second light. A control signal is generated according to the first and second electrical signals. Then, the first and second optical filter units are controlled according to the control signal. According to this method, accurate tracking control of the optical filter can be achieved.
REFERENCES:
patent: 5218653 (1993-06-01), Johnson et al.
patent: 5396359 (1995-03-01), Abramovitz
patent: 5652809 (1997-07-01), Aronson
patent: 5850492 (1998-12-01), Morasca et al.
patent: 5915051 (1999-06-01), Damask et al.
patent: 6370167 (2002-04-01), Donati et al.
patent: 6701031 (2004-03-01), Nakazawa
patent: 0 948 153 (1999-10-01), None
patent: 2001-144353 (1925-01-01), None
patent: 08-114776 (1996-05-01), None
patent: 08-211349 (1996-08-01), None
patent: 08-286160 (1996-11-01), None
patent: 09-090303 (1997-04-01), None
patent: 11-064809 (1999-03-01), None
European Search Report dated Feb. 4, 2005.
Kai Yutaka
Miyata Hideyuki
Tsuyama Isao
Fujitsu Limited
Johnston Phillip A.
Staas & Halsey , LLP
Wells Nikita
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