Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2006-10-03
2006-10-03
Bello, Agustin (Department: 2633)
Optical communications
Multiplex
Wavelength division or frequency division
Reexamination Certificate
active
07116907
ABSTRACT:
A configuration of acousto-optical tunable filters (AOTF) having stable output characteristics so that the output does not significantly vary with time. The configuration includes a plurality of AOTFs cascaded together. Each AOTF generates a surface acoustic wave in an optical waveguide in accordance with RF signals applied to the AOTF. A phase of a beat generated by the RF signals applied to one of the plurality of AOTFs is different from a phase of a beat generated by the RF signals applied to a different AOTF of the plurality of AOTFs.
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S. Sudo, “Optical Amplifier
Nakazawa Tadao
Onaka Hiroshi
Seino Minoru
Bello Agustin
Fujitsu Limited
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