Disclosed is an optical modulator which substantially lowers loss and has little attenuation in
the intensity of an optical signal after modulation. The optical modulator includes a 1x2 RZ …

A Mach-Zehnder optical modulator is provided having first and second modulation
electrodes on respective first and second interferometric arms for receiving modulating …

An optical modulator that includes a resonator near one arm of a Mach-Zehnder
interferometer and that increases the optical length of that arm so as to introduce a phase …

US PATENT DOCUMENTS refractive index; and a third layer over the second layer, the third
layer having a third refractive index larger than the 2,518,647 A 8/1950 Teeple et a1 ' …

An exemplary optical modulator includes an interferometer. The interferometer includes an
input optical coupler, an out put optical coupler, and two or more controllable optical …

An electro-optical modulating system has a light source for producing a carrier wave. The
carrier wave is polar ized by a polarizer so as to adjust the power of the carrier wave in …

[57] ABSTRACT A Y-branch type? rst interferometric modulator, and a coupler structure type
second interferometric modula tor are connected in cascade. The levels of DC bias voltages …

The present invention relates to an optical modulator that generates quaternary amplitude
modulated light without inter-symbol-interference by splitting input light into three optical …

A Mach-Zehnder interferometric optical modulator with a monitor has two branched optical
waveguides for causing light waves propagated therethrough to interfere with each other. A …

A variable chirp optical modulator is provided. An optical waveguide is split for part of its
length into first and second waveguide arms. Electrode pairs are positioned to be proximate …