Optical modulators

Details Optical modulators Optical modulators

2006-02-21

2006-02-21

Epps, Georgia (Department: 2873)

Optical: systems and elements

Optical modulator

Having particular chemical composition or structure

C385S002000

Reexamination Certificate

active

07002731

ABSTRACT:
An object of the present invention is to improve the modulation efficiency of an optical modulator in a high frequency band while satisfying the velocity matching condition. An optical modulator is provided having an optical waveguide for propagating light, an electrode for applying a voltage on the waveguide for modulating the light, a signal source electrically connected to the electrode and a terminating resistance electrically connected to the electrode. The signal source has a characteristic impedance Zi and the terminating resistance has an impedance Zl satisfying the formula (Zi<Zl). Alternatively, the signal source has a characteristic impedance Zi and the electrode has a characteristic impedance Zc satisfying the formula (Zi<Zc).

REFERENCES:
patent: 5790719 (1998-08-01), Mitomi et al.
patent: 6219469 (2001-04-01), Minakata et al.
patent: 6400494 (2002-06-01), Kondo et al.
patent: 2002/0159738 (2002-10-01), Aoki et al.
patent: 2003/0044100 (2003-03-01), Kondo et al.
patent: A 10-133159 (1998-05-01), None
patent: B2 3088988 (2000-07-01), None

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