Optical communications – Transmitter – Having particular modulation
Reexamination Certificate
2011-05-03
2011-05-03
Vanderpuye, Ken N (Department: 2613)
Optical communications
Transmitter
Having particular modulation
C398S187000, C398S192000, C398S195000, C398S198000
Reexamination Certificate
active
07936996
ABSTRACT:
An optical modulator achieving high extinction ratio and an optical modulator system. By a control system performing an adjustment method comprising predetermined steps by applying a bias voltage daringly to a modulation electrode for switching the USB signal and LSB signal of an established optical SSB modulator or optical FSK modulator, a means for adjusting bias voltage applied to each bias electrode preferably automatically is provided and a bias point where the extinction ratio of an optical modulator is maximized can be obtained.
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Izutsu Masayuki
Kawanishi Tetsuya
Sakamoto Takahide
Tsuchiya Masahiro
National Institute of Information and Communications Technology
Ostrager Chong & Flaherty & Broitman P.C.
Vanderpuye Ken N
Woldekidan Hibret A
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