Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2008-03-04
2008-03-04
Leung, Christina (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
C398S196000
Reexamination Certificate
active
10862265
ABSTRACT:
A device and method to monitor and temperature compensate change in wavelength within a WDM optical communication system is disclosed. The device includes a laser diode for generating an optical signal for temperature monitoring, a first fiber Fabry-Perot interferometer sensor unit for generating a first sensor signal according to temperature by means of the optical signal, and a processor for monitoring temperature by means of the first sensor signal and an externally provided second sensor signal and equalizing waveforms of the two sensor signals with each other. The externally provided second sensor signal is provided by a remote node that includes a second fiber Fabry-Perot interferometer sensor unit for receiving the optical signal for temperature monitoring to generate the second sensor signal according to temperature, and a waveguide grating router unit for transmitting the second sensor signal to the optical line terminal.
REFERENCES:
patent: 5646762 (1997-07-01), Delavaux et al.
patent: 6546028 (2003-04-01), Tayebati et al.
patent: 6560255 (2003-05-01), O'Brien et al.
Kim Jin-Hee
Kwon Seo-Won
Lee Jong-Hwa
Lee Kyung-Woo
Lee Yoon-Sun
Cha & Reiter LLC
Leung Christina
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