Optical communications – Transmitter and receiver system – Including compensation
Reexamination Certificate
2011-01-25
2011-01-25
Sedighian, M. R. (Department: 2613)
Optical communications
Transmitter and receiver system
Including compensation
C398S159000, C398S162000
Reexamination Certificate
active
07877017
ABSTRACT:
In an optical waveform measurement system, a phase comparator compares phases between an electric signal output from a PD and an electric signal output from a mixer, and outputs a signal having an amplitude proportional to the phase difference of the two electric signals to a VCO via an LPF, as an error signal. A BPF removes a jitter from the electric signal output from the VCO, and a sampling pulse light source outputs sampling light based on the electric signal with the jitter removed. An optical sampling gate samples signal light to be measured with sampling light output from a sampling pulse light source, and the sampled signal light to be measured is measured by an oscilloscope.
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Futami Fumio
Watanabe Shigeki
Fujitsu Limited
Sedighian M. R.
Staas & Halsey , LLP
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