Optical communications – Transmitter and receiver system – Including optical waveguide
Reexamination Certificate
2008-01-29
2008-01-29
Phan, Hanh (Department: 2613)
Optical communications
Transmitter and receiver system
Including optical waveguide
C398S158000, C398S159000, C398S148000, C398S149000, C398S162000, C398S081000, C398S029000, C398S033000, C398S192000, C398S202000, C398S208000, C398S209000, C398S213000, C398S214000, C398S210000, C398S177000
Reexamination Certificate
active
07324758
ABSTRACT:
An optical dispersion monitoring apparatus and an optical dispersion monitoring method are capable of monitoring dispersion accurately with a simple construction in an optical transmission system using the same. To this end, the optical dispersion monitoring apparatus includes a light receiving section converting an input optical signal into an electrical signal, a signal transition position detecting section detecting the voltage level of a waveform of the output signal from the light receiving section, at a crossing point of a rising edge and a falling edge, and a cumulative dispersion information extracting section comparing the voltage level at the crossing point with a reference signal to extracts cumulative dispersion information.
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Marutani Masazumi
Yamamoto Takuji
Fujitsu Limited
Phan Hanh
Staas & Halsey , LLP
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