Wavelength multiplexing method and an apparatus thereof

Details Wavelength multiplexing method and an apparatus thereof Wavelength multiplexing method and an apparatus thereof

2007-04-24

2007-04-24

Sedighian, M. R. (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S082000, C398S043000

Reexamination Certificate

active

10686670

ABSTRACT:
An optical wavelength multiplexing apparatus is capable of controlling an attenuation amount of a variable optical attenuator at high speed, thereby preventing an optical level change generated by an upstream WDM section from flowing into a downstream WDM section.The high speed control is realized by providing a fast-operating local feedback loop for each variable optical attenuator in addition to a slower main feedback loop.

REFERENCES:
patent: 6671466 (2003-12-01), Banerjee et al.
patent: 6768831 (2004-07-01), Maeda
patent: 2003/0025965 (2003-02-01), Takatsu et al.
patent: 9-261205 (1997-10-01), None

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