Methods and apparatus for sensing multiple wavelengths...

Optical communications – Multiplex – Wavelength division or frequency division

Reexamination Certificate

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C398S032000, C398S091000, C398S093000

Reexamination Certificate

active

07113705

ABSTRACT:
A method and system provide for sensing multiple wavelengths simultaneously in a single wavelength sensing device. The system may have a plurality of laser signals and a plurality of identifiable modulation signals. A respective laser signal of the plurality of laser signals is combined with a respective identifiable modulation signal of the plurality of identifiable modulation signals so that each of the laser signals is identifiable. A combined optical signal is then formed from the modulated laser signals. A sensor has an input port that receives the combined optical signal. The sensor identifies, for each of the modulated laser signals, a respective laser signal via the identifiable modulation of the respective modulated laser signal.

REFERENCES:
patent: 4977563 (1990-12-01), Nakatani et al.
patent: 5463487 (1995-10-01), Epworth
Woo et a1., V Multi-wavelength Locker for WDM System, Optical Fiber Communication Conference, Technical Digest, Mar.□□8, 2000.
Park et al., Multi-wavelength Locker for WDM System, Optical Fiber Communication Conference, Technical Digest, Mar. 8, 2000.

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