Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2007-11-13
2007-11-13
Tran, Dzung (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
C398S062000, C398S064000
Reexamination Certificate
active
10807287
ABSTRACT:
Disclosed is an apparatus for controlling wavelength-division-multiplexed light wherein overall power of wavelength-division-multiplexed light is rendered constant through control for uniformalizing the level of only one wave of maximum power, and wherein the levels of respective channels are made substantially uniform. Optical level control means controls the optical level of propagating wavelength-division-multiplexed light, and a portion of the wavelength-division-multiplexed light output from the output level control means is branched to a tunable optical filter, which selectively outputs the light of each wavelength contained in the wavelength-division-multiplexed light. The light of each wavelength output from the optical filter is photoelectrically converted to an electric signal by photoelectric conversion means. Peak detection means detects the maximum peak value of the electric signal output from the photoelectric conversion means, and a feedback signal is input to the optical level control means in such a manner that the maximum peak value becomes a set value.
REFERENCES:
patent: 4726644 (1988-02-01), Mathis
patent: 5002349 (1991-03-01), Cheung et al.
patent: 5675432 (1997-10-01), Kosaka
patent: 5801861 (1998-09-01), Majima
patent: 5838488 (1998-11-01), Kobayashi
patent: 5880874 (1999-03-01), Shibuya et al.
patent: 6008935 (1999-12-01), Fujita et al.
patent: 6115156 (2000-09-01), Otani et al.
patent: 6204959 (2001-03-01), Fujita et al.
patent: 6466345 (2002-10-01), Bousselet et al.
patent: 0612164 (1994-08-01), None
patent: 0805571 (1997-11-01), None
patent: 2756983 (1998-06-01), None
patent: 6-250132 (1994-09-01), None
patent: 7-64134 (1995-03-01), None
patent: 8-163093 (1996-06-01), None
patent: 8-278523 (1996-10-01), None
patent: 9-289503 (1997-11-01), None
patent: 9-326770 (1997-12-01), None
patent: 10-173266 (1998-06-01), None
patent: 10-229237 (1998-08-01), None
patent: 10-290213 (1998-10-01), None
Fujitsu Limited
Staas & Halsey , LLP
Tran Dzung
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