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US 7,002,731 B2Granted
Optical modulators
AssigneeNGK Insulators, Ltd.
InventorsOsamu Mitomi, Kenji Aoki, Jungo Kondo, Atsuo Kondo
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AssigneeNGK Insulators, Ltd.
InventorsOsamu Mitomi, Kenji Aoki, Jungo Kondo, Atsuo Kondo
Estimating the term…
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).
An optical modulator comprising an optical waveguide for propagating light, an electrode for applying a voltage on said optical waveguide for modulating said light, a signal source electrically connected to said electrode and a terminating resistance electrically connected to said electrode;
An optical modulator comprising an optical waveguide for propagating light, an electrode for applying a voltage on said optical waveguide for modulating said light, a signal source electrically connected to said electrode and a terminating resistance electrically connected to said electrode;
An optical modulator, comprising:
An optical modulator comprising a main body made of an electrooptic material and one and the other main faces opposing each other, an optical waveguide for propagating light and an electrode provided on said main body for modulating said light;
Dependencies are inferred from the claim text.