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7599628 |
Method for modulating an optical signal and optical transmitter
A method for modulating an optical signal includes the following steps: modulating the intensity of the optical signal with a nonreturn-to-zero bit signal, and modulating the phase of the optical...
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7589882 |
Optical transceiver integratable with silicon VLSI
A modulator for an optical transceiver is disclosed. The modulator has two quarter-wave stack mirrors composed of alternating dielectric layers with an optically absorbing layer sandwiched in...
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7589880 |
Apparatus and methods for manipulating light using nanoscale cometal structures
An apparatus and methods for manipulating light using nanoscale cometal structures are disclosed. A nanoscale optics apparatus for manipulating light includes a plurality of nanoscale cometal...
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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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7567604 |
Optical device with integrated semi-conductor laser source and integrated optical isolator
The field of the invention is that of optical devices comprising an integrated semi-conductor laser and an integrated optical isolator. These devices are used mainly in the field of digital...
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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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7551341 |
Serial modulation display having binary light modulation stage
A display has first and second spatial light modulators for modulating light from a light source. The first spatial light modulator has a plurality of elements switchable between ON and OFF states...
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7548365 |
Semiconductor device and method comprising a high voltage reset driver and an isolated memory array
A method of operating a semiconductor device, a semiconductor device and a digital micromirror system are presented. In an embodiment, the semiconductor device comprises a grounded substrate, a...
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7532384 |
π-Phase shift device for light
A phase shifter includes at least one photonic crystal structure having alternating high and low index dielectric layers. At least two defect structures are positioned between said photonic crystal...
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7532382 |
Display element
The present invention provides a display element including a layered body. The layered body includes a layered portion comprising a plurality of transparent thin films with different refractive...
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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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7524746 |
High-refractive index materials comprising semiconductor nanocrystal compositions, methods of making same, and applications therefor
A high-refractive index material that includes semiconductor nanocrystal compositions. The high-refractive index material has at least one semiconductor nanocrystal composition incorporated in a...
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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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7508573 |
Optical switch structure
A structure of an optical switch makes the optical switch capable of receiving broadband signals. And the manufacturing procedure is simplified.
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7502155 |
Antireflective coating for semiconductor devices and method for the same
According to one embodiment of the present invention, a semiconductor device includes a first layer of dielectric material disposed upon an upper surface of a substrate of a semiconductor device...
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7474460 |
Optical modulation apparatus
An optical modulation apparatus is provided which implements a stable amplifying function by reducing the effect of reflected light rays from end faces of a bidirectional optical amplifier by...
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7463491 |
Wiring board and a semiconductor device using the same
A wiring board includes a core composite layer having first and second core boards and an optical transmission portion; first electrodes disposed on one part of the core composite layer, being...
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7447443 |
Method and system for keeping time alignment between optical data modulation and a periodically modulated light source
A method and system is disclosed for making time alignment for a data transmission system. A first reference clock signal is provided to a first multiplexer coupled to a data modulator through a...
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7446297 |
Sensor and method for providing high transfer rate in page-based optical data storage
A sensor and method for page-based optical data storage. The sensor includes a partially-reflective mirror, a reflective mirror disposed substantially collinear with and spaced apart from the...
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7376358 |
Location specific optical monitoring
An optical spike is generated at an arbitrarily selected location within an arbitrary optical link. The optical spike is generated by deriving a spike signal having a plurality of components, and...
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7373090 |
Modulator driver circuit with selectable on-chip termination
A method and apparatus to accommodate differing output loads without sacrificing impedance matching in an optical modulator driver.
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7372608 |
Light control device and light control system using the same
A light control device includes a substrate, a first reflective layer, a light modulating film in which the refractive index varies according to an applied electric field, a transparent electrode,...
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7355778 |
Semiconductor optical modulator
A semiconductor optical converter for use principally in an optical communications system or an optical information processing system. The semiconductor optical converter comprises an n-InP clad...
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7345804 |
Dynamic optical tag communicator and system using corner cube modulating retroreflector
In some embodiments, a dynamic optical tag communication system is provided which includes high and low index CCR, both having a modulator, such as TCFP-MQWs on a first side of the CCR configured...
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7324258 |
Semiconductor optical modulator integrated resistor for impedance matching using semiconductor doped layer and method of fabricating the same
Provided is a semiconductor optical modulator device in which a resistor for impedance matching is integrated in a device in order to improve performance and to reduce cost during the fabrication...
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7292381 |
Method for conforming a micro-electronic array to arbitrary shapes
Described is a method for conforming electronics to arbitrary shapes. The method comprises acts of forming a device structure to have a growth substrate, an etch stop layer affixed with the growth...
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7257330 |
Duobinary optical transmission apparatus using a semiconductor optical amplifier
Disclosed is a duobinary optical transmission apparatus using a semiconductor optical amplifier (SOA). The duobinary optical transmission apparatus includes a light source for generating a carrier...
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7245413 |
Light modulation apparatus and light modulator control method
A light modulation apparatus including a Mach-Zehnder type light modulator, a driver for modulator outputting a control signal according to an input electric signal, a light branching circuit...
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7228014 |
System for reducing the electrical return loss of a lithium niobate traveling wave optical modulator with low characteristic impedance
An electro-optical modulator is disclosed that has a microwave input, chip with a thin film resistor or a lumped resistor located between an input RF connector and an RF electrode on a Lithium...
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7206110 |
Memory cell dual protection
A spatial light modulator for use in projection display applications is provided. The spatial light modulator includes a substrate including a plurality of electrically active circuits and an...
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7196390 |
Solid state image wavelength converter
A method for encoding information that is encoded in spatial variations of the intensity of light ( 24 ) of a first wave-length into light of a second wavelength, the method comprising: generating...
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7180651 |
Spacer fabrication process for manufacturing reflective stealth mirrors and other MEMS devices
A method for use in manufacturing a microelectromechanical system, such as a reflective stealth mirror includes the steps of: forming an I-shape mirror structure; forming a spacer layer over the...
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7180648 |
Electro-absorption modulator device and methods for fabricating the same
An electro-absorption light intensity modulator device is provided that comprises a first and a second layer disposed relative to the first layer so as to provide a light-absorbing optical...
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7177497 |
Porous silicon filter for wavelength multiplexing or de-multiplexing
A porous silicon filter for wavelength multiplexing and de-multiplexing. Preferred embodiments include rugate-type porous silicon filters with pores having continuously varying widths with pore...
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7177061 |
Semiconductor optical modulator having a quantum well structure for increasing effective photocurrent generating capability
An optical modulator comprises a first waveguide layer and a barrier layer, and a quantum well layer sandwiched between the first waveguide layer and the barrier layer, where the quantum well layer...
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7136595 |
Optical transmitter, optical receiver, and manufacturing method of optical device
An optical transmitter-receiver is provided which is suitable for a high-speed optical communication system. A high-frequency electric line on a mounting substrate becomes a traveling-wave...
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7130100 |
Optical module
Even for a driving impedance of 25 Ω, high transmission waveform quality of an optical transmission module is maintained using an optical modulator element designed for a driving impedance of 50...
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7129469 |
Photodetectors, optical modules, and optical transmission devices
A method is provided to provide a photodetector that can enhance the light receiving sensitivity with a relatively simple structure, and that can maintain a high speed responsiveness. A...
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7127129 |
Method and apparatus for phase shifting an optical beam in an optical device
An apparatus and method for high speed phase modulation of optical beam with reduced optical loss. In one embodiment, an apparatus includes a first region of an optical waveguide disposed in...
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7116847 |
Method and apparatus for polarization insensitive phase shifting of an optical beam in an optical device
An apparatus and method for modulating a phase of optical beam independent of polarization. In one embodiment, an apparatus according to embodiments of the present invention includes a first region...
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7099069 |
Electro-optic semiconductor modulators
An electro-optic (EO) device having a high-resistivity semiconducting crystal and a method of operating such a device. The local shielding of the externally applied field lowers the EO effect,...
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7095542 |
Electroabsorption modulator having a barrier inside a quantum well
An electroabsorption modulator ( 10 ) includes at least one quantum well ( 26 ) in a conduction band and a corresponding quantum well ( 26 ) in a valence band. A barrier made from InGaAlAs or...
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7079309 |
Use of a photonic crystal for optical amplifier gain control
An optical amplifier having a uniform gain profile uses a photonic crystal to tune the density-of-states of a gain medium so as to modify the light emission rate between atomic states. The...
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7075124 |
Radiation-sensitive semiconductor body having an integrated filter layer
A radiation-sensitive semiconductor body which has at least one radiation-absorbent active area ( 2 ) between at least two contact layers ( 6, 7 ) and which receives electromagnetic radiation in a...
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7067793 |
High speed self-pixelating low light level optical system
An optical system includes an InGaAsP photodiode having a bandgap and configured to operate in Gieger mode, a first light source configured to emit an optical signal of a first wavelength less than...
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7064881 |
InP-based phase modulators and methods for making and using same
A modulator, including: an active modulator layer including a plurality of step quantum wells, wherein at least one of the plurality of step quantum wells is configured to have a leaky electron...
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7024056 |
Electro-optic gating arrangement with improved duty cycle
The device includes an oscillator ( 1 ) to generate an electrical signal of a predetermined frequency and a signal divider ( 2 ) to split the electrical signal into first and second signals. The...
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7010179 |
Differential drive semiconductor optical modulator
A differential drive semiconductor optical modulator includes: a differential driver circuit having output pads which can output a pair of differential signals; a transmission-line substrate having...
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7009772 |
High transmittance overcoat for microlens arrays in semiconductor color imagers
A transmittance overcoat with effectively planar top surface and specified optical and materials properties is applied above a microlens layer to extend the focal length and enhance the performance...
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7009210 |
Method and apparatus for bit-rate and format insensitive performance monitoring of lightwave signals
A method and apparatus for a tunable optical spectrum analyzer that can measure the optical spectrum of a demultiplexed DWDM signal are presented. The signal level and Optical Signal to Noise Ratio...
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