Photovoltaic Power Converter
Granted: May 12, 2011
Application Number:
20110108081
The invention provides a photovoltaic power converter that includes a multilayer structure supported by a substrate having a base layer of a semiconductor material of a first conductivity type and a first emitter layer of a semiconductor material of a second conductivity type opposite said first conductivity type forming a p-n junction region therebetween, and a first current blocking layer of a semiconductor material of the second conductivity type interposed between the substrate and…
Multi-Segment Photovoltaic Power Converter With A Center Portion
Granted: May 12, 2011
Application Number:
20110108082
The invention provides a photovoltaic power converter that includes a plurality of spatially separated device segments supported by a substrate, wherein the device segments are arranged in a circular pattern wherein a first group of the device segments consisting of one or more of the device segments is centrally positioned and is surrounded by a second group of the device segments comprising at least two device segments and wherein two or more of the plurality of the device segments are…
SCANNING SPECTROMETER WITH MULTIPLE PHOTODETECTORS
Granted: April 28, 2011
Application Number:
20110096326
A scanning optical spectrometer with a detector array is disclosed, in which position of focused spot of light at the input of a dispersive element such as arrayed waveguide grating (AWG) with a slab input, is scanned using a micro-electro-mechanical (MEMS) tiltable micromirror so as to make the dispersed spectrum of light scan over the detector array coupled to the AWG. Sub-spectra recorded using individual detectors are concatenated by a processor unit to obtain the spectrum of input…
IDENTIFYING AN ORIGIN OF A DOCSIS UPSTREAM BURST
Granted: April 28, 2011
Application Number:
20110096684
A method and an apparatus for identifying an origin of captured DOCSIS upstream bursts are disclosed. Upstream bursts are captured without knowing their allocated time slots in advance. Information from an upstream channel descriptor is used to generate RF waveforms of upstream burst preambles, which arc then correlated to the captured upstream waveforms to determine the type of captured upstream bursts without having to decode the latter. Once the type of the captured upstream bursts is…
COMPACT TAP MONITOR
Granted: April 21, 2011
Application Number:
20110089314
A compact PD unidirectivity solution for an optical tap monitor, which reduces the overall size of optical tap module, is provided. The solution is to use lensing to separate the light from the input and output fibres, and then add a mask or spacer in front of the monitor PD to prevent any of the light from the output fiber from entering the photodetector package.
MOUNTED SEMICONDUCTOR DEVICE AND A METHOD FOR MAKING THE SAME
Granted: April 21, 2011
Application Number:
20110090927
A method for mounting a semiconductor device onto a composite substrate, including a submount and a heat sink, is described. According to one aspect of the invention, the materials for the submount and the heat sink are chosen so that the value of coefficient of thermal expansion of the semiconductor device is in between the values of coefficients of thermal expansion of the materials of the submount and the heat sink, the thickness of the submount being chosen so as to equalize thermal…
ELECTRICAL TERMINATION CIRCUIT FOR A TRAVELING-WAVE OPTOELECTRONIC DEVICE
Granted: March 3, 2011
Application Number:
20110049335
An electrical termination circuit for a traveling wave optoelectronic device is disclosed. The electrical termination circuit is constructed to reflect a portion of a radio-frequency signal back into the optoelectronic device. The reflected signal is out of phase with the applied radio-frequency signal at a frequency of a detrimental spectral feature or a bump in an electro-optical transfer characteristic of the optoelectronic device. The amplitude and the phase of the reflected signal…
MODULATION SYSTEM AND METHOD FOR GENERATING A RETURN-TO-ZERO (RZ) OPTICAL DATA SIGNAL
Granted: February 24, 2011
Application Number:
20110043888
A modulation system and a method for generating a return-to-zero (RZ) optical data signal are provided. The modulation system comprises a Mach-Zehnder (MZ) modulator and a drive circuit, which includes a logic XOR gate and a differential amplifier. The logic XOR gate applies a logic XOR operation to a non-return-to-zero (NRZ) electrical data signal and an inverse of an electrical clock signal to generate an electrical intermediate signal. The differential amplifier differentially…
PULSED OPTICAL SOURCE
Granted: February 10, 2011
Application Number:
20110032605
The invention relates to pulsed optical sources formed of a source of seed optical radiation, a pulsed optical amplifier for pulsing the seed optical radiation, and an output optical port for outputting a pulsed optical signal produced by the pulsed optical amplifier. An optically isolating element such as an optical circulator is provided in the optical path between the optical seed source and the pulsed optical amplifier.
FIBER TRAY
Granted: February 3, 2011
Application Number:
20110026895
A fiber tray for routing and packaging an optical fiber is disclosed. The fiber tray includes a generally round central section, a lead-in section, and a lead-out section. All three sections are integrally formed out of a thin sheet of a material and coated with a tacky adhesive material for fiber retention. The adhesive allows for fiber removal and rerouting if required. The tray includes guiding walls, which establish the path of the optical fiber on the tray. The optical fiber is…
LIGHT EMITTING SEMICONDUCTOR DEVICE
Granted: February 3, 2011
Application Number:
20110026558
A fiber coupled semiconductor device and a method of manufacturing of such a device are disclosed. The method provides an improved stability of optical coupling during assembly of the device, whereby a higher optical power levels and higher overall efficiency of the fiber coupled device can be achieved. The improvement is achieved by attaching the optical fiber to a vertical mounting surface of a fiber mount. The platform holding the semiconductor chip and the optical fiber can be…
SHARING SINGLE TESTER AMONG PLURALITY OF ACTIVE COMMUNICATION LINKS
Granted: September 23, 2010
Application Number:
20100241906
A test system for testing a communication system having a plurality of communication links is disclosed. The test system has a single tester for performing various measurement and diagnostic tasks on a single link. The test system also has a switching system for independently testing any link by coupling the tester into any one link. The tester is coupled into the link by coupling the tester input to the link's transmitter and the tester output to the link's receiver. The switching…
PATTERNING OF A SPACER LAYER IN AN INTERFERENCE FILTER
Granted: September 23, 2010
Application Number:
20100239753
The invention relates to a method of manufacturing a color-shifting optical device with a dielectric spacer layer such that different regions thereof have different thicknesses. The method includes: (a) coating a substrate with one of a reflector or absorber layer, (b) providing a spacer layer onto the layer coated in step (a), the spacer layer comprising a spacer material and a soluble pocket within the spacer layer, (c) modifying the spacer layer by dissolving the soluble pocket so as…
THREE-DIMENSIONAL (3D) COLOR DISPLAY SYSTEM
Granted: September 9, 2010
Application Number:
20100225836
The present invention provides a three-dimensional (3D) color display system, and a backlight for a liquid-crystal display (LCD) panel in such a 3D color display system. The backlight comprises a right-eye backlight module, a left-eye backlight module, and a backlight control module. The right-eye backlight module transmits a right-eye first-color band, a right-eye second-color band, and a right-eye third-color band, from which right-eye images are produced, to the LCD panel. The…
SYSTEMS AND METHODS FOR DATA ALIGNMENT
Granted: August 19, 2010
Application Number:
20100211859
A data alignment system suitable for use in manipulating the positioning of a designated portion of a data stream transmitted by a high speed communications system, so as to facilitate further processing of the data carried by the data stream. The data alignment system includes a detector and an alignment component in communication with each other. In operation, the detector locates and identifies, in accordance with suitable instructions, the designated portion of the data stream. The…
Laser Diode
Granted: June 17, 2010
Application Number:
20100150196
The present invention provides a laser diode having both a small vertical far-field beam divergence and a large vertical optical confinement factor, as well as a method of fabricating the laser diode. The laser diode comprises a layer stack of semiconductor material, which includes a mode-splitting layer having a low refractive index inserted between waveguide layers. In addition to increasing the vertical near-field beam width of the laser diode, the mode-splitting layer also produces a…
Multi-Electrode Light Emitting Device
Granted: June 10, 2010
Application Number:
20100140632
The invention relates to a broad-band light emitting diode having an active layer composed of a plurality of light emission regions of differing materials for emitting light at a plurality of wavelengths, wherein each of the emission regions of the active layer is electrically controlled by a separate electrode for providing a broad-band emission or optical gain with a multi-point control of its spectral profile.
ELECTRO-OPTIC DEVICE
Granted: May 6, 2010
Application Number:
20100111464
The present invention provides an electro-optic device comprising three or more radio-frequency (RF) signal electrodes, which each include an input segment. The input segments of the three or more RF-signal electrodes are arranged in a fractal pattern followed in an RF-signal transit direction by a parallel-bend pattern. Advantageously, this arrangement allows matching of RF-signal transit times of the input segments and near matching of RF-signal losses of the input segments.
OPTICAL VORTEX RETARDER MICRO-ARRAY
Granted: March 18, 2010
Application Number:
20100066929
A micro-array of optical vortex retarders is provided by forming an alignment layer having a plurality of discrete alignment patches with different orientations. A layer of birefringent material, including one of a liquid crystal and a liquid crystal polymer precursor material, is provided adjacent to the alignment layer. The aligning orientation and position of each discrete alignment patch in the plurality of discrete alignment patches is selected to induce the layer of birefringent…
Optical Device Exhibiting Color Shift Upon Rotation
Granted: March 11, 2010
Application Number:
20100060987
An optical device exhibiting a color shift upon rotation is disclosed. The optical device has a textured surface having a relief structure finer than a human eye resolution but large enough not to exhibit diffraction effects. The textured surface is coated with an interference thin film that exhibits a color shift with tilt. A uniform color seen at one angle of rotation changes to another uniform color when the optical device is rotated in its own plane. A method of manufacturing of such…
