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7620284 |
Optical waveform shaping device including portions for respectively absorbing and amplifying transmitted optical signal
An optical waveform shaping device includes a first waveguide portion, formed on a substrate, for transmitting the optical signal and simultaneously absorbing a portion of the optical signal, which...
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7616850 |
Wavelength-tunable optical ring resonators
Optical ring resonator devices are disclosed that can be used for optical filtering, modulation or switching, or for use as photodetectors or sensors. These devices can be formed as microdisk ring...
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7616843 |
Optical functional device and fabrication process of the same
Arranged for at least one of a pair of branch optical waveguides in a Mach-Zehnder type interference optical system is a ring resonance type phase shifter for modulating a light wave signal...
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7616618 |
Code cycle modulation in optical code division multiple access systems
An optical code division multiple access (OCDMA) system includes an optical transmitter system configured to transmit data from a plurality of users through a shared optical channel by encoding the...
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7613366 |
Polarization mode dispersion compensator and polarization mode dispersion compensating method
An amount of change of a control signal applied to a polarization controller in a polarization mode dispersion compensator is determined for each feedback loop by evaluating degree of polarization...
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7606501 |
System and method for generating optical return-to-zero signals with alternating bi-phase shift and frequency chirp
A system and method for generating an optical return-to-zero signal with frequency chirp. The system includes a bit separator configured to receive an electrical non-return-to-zero signal and...
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7599595 |
Semiconductor optoelectronic waveguide
The present invention relates to a semiconductor optoelectronic waveguide having a nin-type hetero structure which is able to stably operate an optical modulator. On the upper and lower surfaces of...
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7593606 |
Optical modulator including waveguide grating structure and multiple quantum well layer
An optical modulator and related methods are described. In accordance with one embodiment, the optical modulator comprises a horizontal waveguide grating structure (WGS) receiving an incident...
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7590313 |
Phased-array optical whispering gallery mode modulation and method
A whispering gallery mode (WGM) resonator device and method capable of filtering sidebands of optical modulators are provided. The method includes providing an optical resonator adapted to support...
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7590312 |
Interferometer optical switch and variable optical attenuator
The present invention discloses an interferometer optical switch that can carry out switching over a broad band and has a high extinction ratio and large fabrication tolerance. The interferometer...
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7583894 |
Interferometric operation of electroabsorption modulators
Methods and apparatus are described for modulating an optical signal using electroabsorption in conjunction with an optical interferometer. Phase-shift keying modulation can be achieved with lower...
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7583868 |
3R recovery system
A full 3R (re-timing, re-shaping, re-amplifying) recovery system is provided. In the full 3R recovery system, a self-pulsating laser diode (SP-LD) and an electroabsorption modulator (EAM) are...
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7583329 |
Electro-optical device substrate, electro-optical device and electronic apparatus
An electro-optical device substrate includes a substrate, a plurality of data lines, a plurality of scanning lines, pixel electrodes, and transistors. The plurality of data lines and the plurality...
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7580596 |
Non-volatile programmable optical element with absorption coefficient modulation
A non-volatile programmable electro-optical element alters absorption characteristics of an optical medium that comprises a transition metal oxide material by electrostatically moving oxygen...
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7580593 |
Optical attenuator
In an optical attenuator, there are a first optical waveguide 3 A connected to an input optical waveguide 1 , a second optical waveguide 3 B connected to an output optical waveguide 2 and a...
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7580592 |
Optical phase shift device and antenna system utilizing same
A phase shift device of an optical fiber signal includes an actuator for changing the signal phase in at least one fiber portion by inducing the phase change by thermo-optical effect. An antenna...
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7580239 |
Capacitive latched bi-stable molecular switch
A charge storage cell is made up of two electrodes spaced apart by a dielectric layer incorporating a molecular switch. A method of operating a bi-stable, molecular switch charge storage cell...
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7577367 |
Optical communication using duobinary modulation
Optical techniques, devices and systems for combining duobinary modulation and optical subcarrier multiplexing in optical communication applications. An analog mixer is used to mix a duobinary...
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7577319 |
Semiconductor optical device and manufacturing method thereof
A low reflective window structure in an existent electro-absorption optical modulator involves a trading off problem between the increase in the parasitic capacitance and the pile-up. This is...
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7570843 |
Optical modulation element module
The present invention provides an optical modulation element module which is capable of the optical modulation for analog transmission with a low driving voltage and low chirp. An optical...
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7567736 |
Waveguide type wavelength domain optical switch
A waveguide type wavelength domain optical switch includes an input/output port including at least three waveguide spectrometers stacked in thickness direction, a first lens for collecting light...
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7561806 |
Method and system for keeping timing alignment between driving signals in optical double modulation
A method and system is disclosed for making timing alignment for a data transmission system, the method comprising providing a reference clock signal with a first frequency to a multiplexer through...
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7561759 |
Optical modulator
Optical modulator devices exhibiting improved response characteristics are constructed from a ring resonator having a tunable loss element positioned within the ring resonator structure and one or...
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7559486 |
Apparatuses and methods for forming wireless RF labels
Apparatuses and methods for forming wireless RF labels are claimed. In one embodiment, a flexible layer may be made to receive an array of integrated circuit chips The integrated circuit chips may...
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7558456 |
Optical waveguide device
An optical waveguide device includes a lower cladding layer, a high refractive index region provided on the lower cladding layer, a pair of cores provided on the lower cladding layer on both sides...
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7558445 |
Electro-optical device and electronic apparatus
An electro-optical device includes a semiconductor layer, a gate electrode, and a first insulating film, and a second insulating under the semiconductor layer. The first insulating film overlaps a...
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7558444 |
Traveling-wave-type optical modulator and method of adjusting the same
To provide a traveling-wave-type optical modulator and a method of adjusting the same, in which an occurrence of a jitter can be suppressed when an optical modulator is driven by using a driver,...
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7555226 |
Automatic bias control for an optical modulator
An automatic bias controller for an optical modulator is provided. The automatic bias controller comprises a driver for providing an electrical data signal to the modulator and a bias voltage...
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7555223 |
UWB signal generator using optical FSK modulator
A UWB signal generator includes: a laser light source for generating laser light, an optical intensity modulator for modulating an intensity of laser light from the laser light source, a signal...
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7555174 |
Coplanar waveguide line
A coplanar waveguide line comprising
a substrate; a central electrode strip on the substrate; first and second electrode strips disposed on opposite sides of the central electrode strip and...
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7555173 |
Electro-optic modulator on rib waveguide
An electro-optic modulator is formed on a silicon-on-insulator (SOI) rib waveguide. An optical field in the modulator is confined by using an electrically modulated microcavity. The microcavity has...
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7551820 |
Optical device
An optical device including (a) a substrate having an electro-optic effect; (b) an optical waveguide formed on a surface layer portion of said substrate and including an optical waveguide for...
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7551809 |
Optical fiber delivery system for delivering ultrashort optical pulses and optical system including the same
An optical fiber delivery system for delivering ultrashort optical pulses that can efficiently transmit high peak power, ultrashort optical pulses from an optical pulse source to a desired position...
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7546017 |
Electro-photonic modulators
Various embodiments of the present invention are directed to modulators that can be operated electronically and used to modulate electromagnetic radiation. In one embodiment of the present...
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7542631 |
Optical transmission system
An optical transmission system which provides bandwidth restricted optical signal comprises an input terminal ( 10 ) for accepting an electrical binary signal, an amplifier ( 12 ) for amplifying...
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7542630 |
High speed optical phase modulator
An optical device includes a phase modulator having a waveguide on a substrate. The phase modulator also includes an n-type region having a proximity to a p-type region that causes formation of a...
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7539358 |
SOI-based opto-electronic device including corrugated active region
The surface silicon layer (SOI layer) of an SOI-based optical modulator is processed to exhibit a corrugated surface along the direction of optical signal propagation. The required dielectric layer...
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7532778 |
Optical waveguide modulator equipped with an output light monitor
An optical waveguide element having a plurality of surface waveguide portions. A connecting portion for connecting the surface waveguide portions. An output light-outputting waveguide portion...
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7532777 |
Optical functional devices
An optical functional device has a slab type two-dimensional photonic crystal layer. The photonic crystal layer has a dielectric layer and a plurality of lattice columns each comprising dielectric...
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7532776 |
Optical element and optical switch
A core layer of an optical waveguide is grown as a film comprised of an electro-optic material with a rhombohedral structure and grown above a substrate with (100) crystal orientation on a major face.
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7532379 |
Optical modulator with side access
An electro-optic semiconductor device (e.g., an optical modulator) having side access and beam propagation within the device is provided. Side access for the optical input and/or output facilitates...
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7529447 |
Optical waveguide devices
The present invention provides an optical waveguide device having a configuration such that the optical waveguide is folded back on an end area of the optical waveguide substrate to widen the...
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7526146 |
Electro-optical modulator and a method for manufacturing the same
An electro-optical modulator is provided. The electro-optical modulator has a substrate. A first insulator layer, an optical waveguide, a first doped semiconductor layer, a second insulator layer,...
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7522783 |
Optical interconnect apparatuses and electro-optic modulators for processing systems
Disclosed are optical modulators that provide high-speed modulation capability and compact size. In exemplary modulator embodiments, the branch waveguide cores are formed in different processing...
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7519240 |
Multi-section coupler to mitigate guide-guide asymmetry
A wavelength independent multi-section optical coupler having at least three optical couplers, and at least two differential phase cells. Each optical coupler has two waveguides forming a coupling...
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7515779 |
Optical semiconductor device
An optical semiconductor device has a heater, an optical waveguide layer, a first electrode and a second electrode. The heater is provided on a first semiconductor region and has more than one...
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7515778 |
Segmented optical modulator
An optical modulator is formed to include an adjustable drive arrangement for dynamically adjusting the effective length of the optical signals path(s) within the modulator. Each modulator arm is...
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7515777 |
Silicon-based Ge/SiGe optical interconnects
SiGe quantum wells where the well material has a lowest conduction band energy minimum at k=0 (the Γ point of the first Brillouin zone) are provided. Quantum well structures that satisfy this...
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7515776 |
Temperature-controlled optical modulator
SiGe quantum wells where the well material has a lowest conduction band energy minimum at k=0 (the Γ point of the first Brillouin zone) are provided. Quantum well structures that satisfy this...
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7515775 |
Distributed amplifier optical modulator
Various embodiments described herein comprises an optoelectronic device comprising a waveguide structure including a plurality of optical modulator elements each having an optical property that is...
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