Patent application number | Description | Published |
20110249692 | BEAM DIAGNOSTICS AND FEEDBACK SYSTEM AND METHOD FOR SPECTRALLY BEAM-COMBINED LASERS - Apparatus and method for control of lasers (which use an array of optical gain fibers) in order to improve spectrally beam-combined (SBC) laser beam quality along the plane of the SBC fiber array via spectral-to-spatial mapping of a portion of the spectrally beam-combined laser beams, detection of optical power in each of the spatially dispersed beams and feedback control of the lasers for wavelength-drift correction. The apparatus includes a diffractive element; a source of a plurality of substantially monochromatic light beams directed from different angles to a single location on the diffractive element, wherein the diffractive element spectrally combines the plurality of light beams into a single beam. A controller adjusts characteristics of the light beams if one of the light beams has become misadjusted. In some embodiments, the controller adjusts the wavelength tuning of the respective fiber laser. | 10-13-2011 |
20130230065 | BEAM DIAGNOSTICS AND FEEDBACK METHOD AND SYSTEM FOR SPECTRALLY BEAM-COMBINED LASERS - Apparatus and method for control of lasers (which use an array of optical gain fibers) in order to improve spectrally beam-combined (SBC) laser beam quality along the plane of the SBC fiber array via spectral-to-spatial mapping of a portion of the spectrally beam-combined laser beams, detection of optical power in each of the spatially dispersed beams and feedback control of the lasers for wavelength-drift correction. The apparatus includes a diffractive element; a source of a plurality of substantially monochromatic light beams directed from different angles to a single location on the diffractive element, wherein the diffractive element spectrally combines the plurality of light beams into a single beam. A controller adjusts characteristics of the light beams if one of the light beams has become misadjusted. In some embodiments, the controller adjusts the wavelength tuning of the respective fiber laser. | 09-05-2013 |
20150138630 | FIBER AMPLIFIER SYSTEM FOR SUPPRESSION OF MODAL INSTABILITIES AND METHOD - Apparatus and method for suppressing modal instabilities (MI) in fiber-amplifier systems. In some embodiments, thermal effects drive the MI process, and in some such embodiments, the present invention provides a plurality of options for mitigating these thermal effects. In some embodiments, the present invention provides a hybrid fiber with a smaller core in the initial length where the thermal loads are highest, followed by a larger-core fiber. In some embodiments the length of the smaller-core section is chosen to keep the core heat-per-unit-length of the second section below a critical value for the onset of MI. In some embodiments, the hybrid fiber of the present invention avoids modal instabilities while yielding almost the same performance as compared to conventional fibers with regard to minimizing fiber nonlinearities such as Stimulated Brillouin Scattering (SBS). In some embodiments, the hybrid fiber outputs a signal beam with at least 1 kW of power. | 05-21-2015 |
20150219765 | FREQUENCY QUADRUPLED LASER USING THULIUM-DOPED FIBER AMPLIFIER AND METHOD - An apparatus, method and associated fiber-laser architectures for high-power pulsed operation and pumping wavelength-conversion devices. Some embodiments generate blue laser light by frequency quadrupling infrared (IR) light from Tm-doped gain fiber using non-linear wavelength conversion. Some embodiments use a fiber MOPA configuration to amplify a seed signal from a semiconductor laser or ring fiber laser. Some embodiments use the frequency-quadrupled blue light for underwater communications, imaging, and/or object and anomaly detection. Some embodiments amplitude modulate the IR seed signal to encode communication data sent to or from a submarine once the modulated light has its wavelength quartered. Other embodiments transmit blue-light pulses in a scanned pattern and detect scattered light to measure distances to objects in a raster-scanned underwater volume, which in turn are used to generate a data structure representing a three-dimensional rendition of the underwater scene being imaged for viewing by a person or for other software analysis. | 08-06-2015 |
20150234195 | APPARATUS AND METHOD FOR FIBER-LASER OUTPUT-BEAM SHAPING FOR SPECTRAL BEAM COMBINATION - A method and apparatus for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination. This invention includes a plurality of laser sources that emit a plurality of beamlets, wherein each one of the plurality of beamlets has a different wavelength; a beam annularizer that includes a plurality of optical units arranged to receive the beamlets, and configured to convert each beamlet into a respective annular beam that has an annular cross-sectional power profile; a beam-intersection transform element configured to point each respective one of the plurality of annular beams in an angular intersection arrangement toward a first location; and a spectral beam combiner at the first location configured to combine the plurality of wavelengths in the plurality of annular beams into a first annular spectrally combined beam. | 08-20-2015 |
Patent application number | Description | Published |
20090065810 | III-NITRIDE BIDIRECTIONAL SWITCHES - Bidirectional switches are described. The bidirectional switches include first and a second III-N based high electron mobility transistor. In some embodiments, the source of the first transistor is in electrical contact with a source of the second transistor. In some embodiments, the drain of the first transistor is in electrical contact with a drain of the second transistor. In some embodiments, the two transistors share a drift region and the switch is free of a drain contact between the two transistors. Matrix converters can be formed from the bidirectional switches. | 03-12-2009 |
20090072269 | GALLIUM NITRIDE DIODES AND INTEGRATED COMPONENTS - A diode device can include an enhancement mode gallium nitride transistor having a gate, a drain and a source, wherein the gate is connected to the drain to enable the device to perform as a diode. In some embodiments, an integrated switching-diode is described that includes a substrate, a gallium nitride switching transistor on the substrate and a free wheeling diode on the substrate and coupled to the switching transistor. | 03-19-2009 |
20090201072 | BRIDGE CIRCUITS AND THEIR COMPONENTS - A half bridge is described with at least one transistor having a channel that is capable in a first mode of operation of blocking a substantial voltage in at least one direction, in a second mode of operation of conducting substantial current in one direction through the channel and in a third mode of operation of conducting substantial current in an opposite direction through the channel. The half bridge can have two circuits with such a transistor. | 08-13-2009 |
20100073067 | Inductive Load Power Switching Circuits - Power switching circuits including an inductive load and a switching device are described. The switches devices can be either low-side or high-side switches. Some of the switches are transistors that are able to block voltages or prevent substantial current from flowing through the transistor when voltage is applied across the transistor. | 03-25-2010 |
20110193619 | SEMICONDUCTOR ELECTRONIC COMPONENTS AND CIRCUITS - An electronic component includes a high-voltage depletion-mode transistor and a low-voltage enhancement-mode transistor both encased in a single package. A source electrode of the high-voltage depletion-mode transistor is electrically connected to a drain electrode of the low-voltage enhancement-mode transistor, a drain electrode of the high-voltage depletion-mode transistor is electrically connected to a drain lead of the single package, a gate electrode of the low-voltage enhancement-mode transistor is electrically connected to a gate lead of the single package, a gate electrode of the high-voltage depletion-mode transistor is electrically connected to an additional lead of the single package, and a source electrode of the low-voltage enhancement-mode transistor is electrically connected to a conductive structural portion of the single package. | 08-11-2011 |
20110249477 | BRIDGE CIRCUITS AND THEIR COMPONENTS - A half bridge is described with at least one transistor having a channel that is capable in a first mode of operation of blocking a substantial voltage in at least one direction, in a second mode of operation of conducting substantial current in one direction through the channel and in a third mode of operation of conducting substantial current in an opposite direction through the channel. The half bridge can have two circuits with such a transistor. | 10-13-2011 |
20120218025 | ELECTRONIC COMPONENTS WITH REACTIVE FILTERS - An electronic component comprising a half bridge adapted for operation with an electrical load having an operating frequency is described. The half bridge comprises a first switch and a second switch each having a switching frequency, the first switch and the second switch each including a first terminal, a second terminal, and a control terminal, wherein the first terminal of the first switch and the second terminal of the second switch are both electrically connected to a node. The electronic component further includes a filter having a 3 dB roll-off frequency, the 3 dB roll-off frequency being less than the switching frequency of the switches but greater than the operating frequency of the electrical load. The first terminal of the filter is electrically coupled to the node, and the 3 dB roll-off frequency of the filter is greater than 5 kHz. | 08-30-2012 |
20130009613 | Inductive Load Power Switching Circuits - Power switching circuits including an inductive load and a switching device are described. The switches devices can be either low-side or high-side switches. Some of the switches are transistors that are able to block voltages or prevent substantial current from flowing through the transistor when voltage is applied across the transistor. | 01-10-2013 |
20130009692 | Inductive Load Power Switching Circuits - Power switching circuits including an inductive load and a switching device are described. The switches devices can be either low-side or high-side switches. Some of the switches are transistors that are able to block voltages or prevent substantial current from flowing through the transistor when voltage is applied across the transistor. | 01-10-2013 |
20130249622 | BRIDGE CIRCUITS AND THEIR COMPONENTS - A half bridge is described with at least one transistor having a channel that is capable in a first mode of operation of blocking a substantial voltage in at least one direction, in a second mode of operation of conducting substantial current in one direction through the channel and in a third mode of operation of conducting substantial current in an opposite direction through the channel. The half bridge can have two circuits with such a transistor. | 09-26-2013 |
20130320939 | INDUCTIVE LOAD POWER SWITCHING CIRCUITS - Power switching circuits including an inductive load and a switching device are described. The switches devices can be either low-side or high-side switches. Some of the switches are transistors that are able to block voltages or prevent substantial current from flowing through the transistor when voltage is applied across the transistor. | 12-05-2013 |
20140042495 | SEMICONDUCTOR ELECTRONIC COMPONENTS AND CIRCUITS - An electronic component includes a high-voltage depletion-mode transistor and a low-voltage enhancement-mode transistor both encased in a single package. A source electrode of the high-voltage depletion-mode transistor is electrically connected to a drain electrode of the low-voltage enhancement-mode transistor, a drain electrode of the high-voltage depletion-mode transistor is electrically connected to a drain lead of the single package, a gate electrode of the low-voltage enhancement-mode transistor is electrically connected to a gate lead of the single package, a gate electrode of the high-voltage depletion-mode transistor is electrically connected to an additional lead of the single package, and a source electrode of the low-voltage enhancement-mode transistor is electrically connected to a conductive structural portion of the single package. | 02-13-2014 |
20140292394 | METHOD OF FORMING ELECTRONIC COMPONENTS WITH REACTIVE FILTERS - An electronic component comprising a half bridge adapted for operation with an electrical load having an operating frequency is described. The half bridge comprises a first switch and a second switch each having a switching frequency, the first switch and the second switch each including a first terminal, a second terminal, and a control terminal, wherein the first terminal of the first switch and the second terminal of the second switch are both electrically connected to a node. The electronic component further includes a filter having a 3 dB roll-off frequency, the 3 dB roll-off frequency being less than the switching frequency of the switches but greater than the operating frequency of the electrical load. The first terminal of the filter is electrically coupled to the node, and the 3 dB roll-off frequency of the filter is greater than 5 kHz. | 10-02-2014 |
20140327412 | INDUCTIVE LOAD POWER SWITCHING CIRCUITS - Power switching circuits including an inductive load and a switching device are described. The switches devices can be either low-side or high-side switches. Some of the switches are transistors that are able to block voltages or prevent substantial current from flowing through the transistor when voltage is applied across the transistor. | 11-06-2014 |
20150016169 | MULTILEVEL INVERTERS AND THEIR COMPONENTS - A multilevel inverter includes a first half bridge in series with a second half bridge, each comprising a switch having a channel. The switch is configured to block a substantial voltage in a first direction during a first mode of operation, to conduct substantial current through the channel in the first direction during a second mode of operation, and to conduct substantial current through the channel in a second direction during a third mode of operation. During the third mode of operation, a gate of the switch is biased relative to a source of the switch at a voltage that is less than a threshold voltage of the switch. The inverter may also include a third half bridge. The inverter can be configured such that in operation, switches of the third half bridge are switched at a substantially lower frequency than the switches of the first and second half bridges. | 01-15-2015 |
20150070076 | BRIDGE CIRCUITS AND THEIR COMPONENTS - A half bridge is described with at least one transistor having a channel that is capable in a first mode of operation of blocking a substantial voltage in at least one direction, in a second mode of operation of conducting substantial current in one direction through the channel and in a third mode of operation of conducting substantial current in an opposite direction through the channel. The half bridge can have two circuits with such a transistor. | 03-12-2015 |
20160006428 | SWITCHING CIRCUITS HAVING FERRITE BEADS - A circuit includes an electronic component package that comprises at least a first lead, a III-N device in the electronic component package, a gate driver, and a ferrite bead. The III-N device comprises a drain, gate, and source, where the source is coupled to the first lead. The gate driver comprises a first terminal and a second terminal, where the first terminal is coupled to the first lead. The ferrite bead is coupled between the gate of the III-N transistor and the second terminal of the gate driver. When switching, the deleterious effects of the parasitic inductance of the circuit gate loop are mitigated by the ferrite bead. | 01-07-2016 |
Patent application number | Description | Published |
20130310193 | FAIRWAY WOOD GOLF CLUB HEAD - A fairway wood golf club characterized by a long blade length with a long heel blade length section, while maintaining a small club moment arm, as well as a high ratio of the heel blade length section to the club head front-to-back dimension, a low ratio of the club moment arm to the heel blade length section, or a low center of gravity height, and all the benefits afforded therefrom. | 11-21-2013 |
20140051529 | FAIRWAY WOOD GOLF CLUB HEAD - A fairway wood golf club characterized by a long blade length, a small club moment arm, and a large transfer distance thereby producing a relatively small CG angle and a relatively high face closing moment of inertia, and all the benefits afforded therefrom. | 02-20-2014 |
20140274442 | IRON TYPE GOLF CLUB HEAD AND SET - An iron-type golf club head having a sole channel extending from an exterior of a sole portion toward a face. The sole channel has an axis that intersects the face at an axis-to-face intersection point for at least one position along a channel length, and preferably at least 25% of the channel length. The elevation of the intersection point may below the Ycg distance and the axis defines an angle from the vertical that may be related to the loft. The iron-type golf club head may be incorporated in a set containing club heads with varying degrees of unsupported face area. | 09-18-2014 |
20150018117 | GOLF CLUB HEAD WITH PERMANENT PERFORMANCE INDICATING INDICIA - A golf club head having a face with a face center and a center face measured performance variable, which may be a characteristic time, or CT, value, a coefficient of restitution, or COR, value, or a potential smash factor. The face includes a center face permanent indicia that is indicative of the center face measured performance variable. Relationships among the permanent indicia and the face are disclosed to reduce the likelihood of distraction caused by the permanent indicia as a golfer addresses a shot. Further, the surface roughness of the permanent indicia is controlled with respect to the surface roughness of the face to reduce the impact that the permanent indicia has on the performance of the golf club head. | 01-15-2015 |
20160023066 | GOLF CLUB HEAD AND GOLF CLUB - A golf club having a long blade length, large transfer distance, and low forwardly located center of gravity, and all the benefits afforded therefrom. | 01-28-2016 |