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US 2003/0165001 A1Published application
Mach-Zehnder optical modulator
AssigneeOpnext Japan, Inc.
InventorKouichi Uesaka
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AssigneeOpnext Japan, Inc.
InventorKouichi Uesaka
Estimating the term…
A Mach-Zehnder optical modulator that can attain a higher transmission speed than the driver signal speed but also attains, by setting multi-value amplitudes, an information transmission volume corresponding to an integer multiple of a single driver while allowing the transmission speed to remain as it is, wherein plural optical waveguide branches and plural Mach-Zehnder modulator portions are used, and by utilizing a propagation delay of a modulation signal for driving each of the modulator portions there is attained a transmission speed proportional to the delay time. This leads to a transmission signal having a frequency higher than the cut-off frequency of, for example, an IC or a transmission line substrate having an electrical characteristic of generating and propagating a modulation signal in such a form as an optical MUX (multiplexer).
A mach-Zehnder optical modulator comprising:
A Mach-Zehnder optical modulator which modulates light propagated through an optical wave guide in accordance with a modulation voltage applied, the optical waveguide having plural, at least two, branches, and which comprises plural, at least two, Mach-Zehnder optical modulator portions for modulating light signals propagated through optical waveguides in accordance with the modulation voltage applied.
Dependencies are inferred from the claim text.