Optical channel power equalizer

Details Optical channel power equalizer Optical channel power equalizer

2007-09-25

2007-09-25

Sedighian, M. R. (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S033000, C398S038000

Reexamination Certificate

active

10723508

ABSTRACT:
An optical channel power equalizer for equalizing the per-channel power levels of a multi-channel optical signal is provided. The channel power equalizer includes an optical spectrum measurement unit that extracts a portion of the amplified optical signal and measures the per-channel power levels of the extracted optical signal; a controller that compares the measured power levels with a predetermined reference value, and determines to output the degrees of attenuation per channel based on differences between the measured per-channel power levels and the reference value; and a per-channel optical attenuation unit that attenuates the per-channel power levels of a plurality of input optical signals based on the degrees of attenuation and outputs the attenuated optical signals as the plurality of channels.

REFERENCES:
patent: 6341021 (2002-01-01), Wilner et al.
patent: 6400479 (2002-06-01), Zhou et al.
patent: 7092638 (2006-08-01), Funami et al.
Hyo Sang Kim, et al. “Dynamic Gain Equalization . . . Tunable Filters”, OFC '98 Technical Digest (pp. 136-138).

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