Optical communications – Diagnostic testing – Determination of communication parameter
Reexamination Certificate
2005-05-25
2010-11-16
Liu, Li (Department: 2613)
Optical communications
Diagnostic testing
Determination of communication parameter
C398S016000, C398S028000, C398S033000, C398S065000, C398S152000, C356S073100
Reexamination Certificate
active
07835643
ABSTRACT:
The present invention relates an optical waveform measuring apparatus designed to eliminate the polarization dependency of an intensity correlation signal without a polarization diversity arrangement. The apparatus comprises a sampling light outputting unit for outputting a sampling light pulse to sample light under measurement, a sampling result outputting unit for developing a nonlinear optical effect stemming from the light under measurement and the sampling light pulse from the sampling light outputting unit to output light corresponding to a result of the sampling of the light under measurement, and a polarization state control unit for, before the start of the measurement of the light under measurement, carrying out control on the basis of a power level of the light from the sampling result outputting unit so that a polarization state of the light under measurement, which is to be inputted to the sampling light output unit, is placed into a predetermined state.
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Futami Fumio
Watanabe Shigeki
Fujitsu Limited
Liu Li
Staas & Halsey , LLP
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