Optical communications – Transmitter – Having particular modulation
Reexamination Certificate
2011-08-02
2011-08-02
Sedighian, M. R (Department: 2613)
Optical communications
Transmitter
Having particular modulation
C398S183000, C398S198000
Reexamination Certificate
active
07991298
ABSTRACT:
It is an object of the present invention to provide an optical modulation system capable of suppressing a carrier component (f0) and a high order component (such as a second order component (f0±2fm)). The optical modulation system includes Mach-Zehnder waveguide (8), a first intensity modulator (9) provided on a first arm (4), a second intensity modulator (10) provided on a second arm (5), a first main Mach-Zehnder electrode (MZCAelectrode) (13a), and a second main Mach-Zehnder electrode (MZCBelectrode) (13b). Non-desired components propagating the respective arms are made to have reverse phase before optical signals are combined, whereby the optical modulation system is capable of suppressing the non-desired components when the optical signals are combined.
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Izutsu Masayuki
Kawanishi Tetsuya
Sakamoto Takahide
Tsuchiya Masahiro
National Institute of Information and Communications Technology
Osha & Liang LLP
Sedighian M. R
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