Laser power and energy sensor utilizing anisotropic thermoelectric material
Granted: April 21, 2015
Patent Number:
9012848
A laser-radiation sensor includes a copper substrate on which is grown an oriented polycrystalline buffer layer surmounted by an oriented polycrystalline sensor-element of an anisotropic transverse thermoelectric material. An absorber layer, thermally connected to the sensor-element, is heated by laser-radiation to be measured and communicates the heat to the sensor-element, causing a thermal gradient across the sensor-element. Spaced-apart electrodes in electrical contact with the…
Wireless transport framework with variable frequency domain training
Granted: April 14, 2015
Patent Number:
9009761
A system and method for wirelessly transmitting audiovisual information. Training information may be stored in a memory. A plurality of packets may be generated, including the training information. The plurality of packets may also include audiovisual information. The plurality of packets may include first information identifying a first training pattern of a plurality of possible training patterns. The first training pattern may specify one or more locations of the training information…
Parallel execution of trellis-based methods using overlapping sub-sequences
Granted: April 14, 2015
Patent Number:
9008242
A receiver system and method for recovering information from a symbol data sequence Y. The symbol data sequence Y corresponds to a symbol data sequence X that is transmitted onto the channel by a transmitter. The symbol data sequence X is generated by the transmitter based on associated information bits. At the receiver, a set of two or more processors operate in parallel on two or more overlapping subsequences of the symbol data sequence Y, where each of the two or more overlapping…
Low-amplitude echo estimation for a received communication signal
Granted: April 14, 2015
Patent Number:
9008216
A system and method for identifying minor echoes present in an input signal in the situation where a set of major echoes has already been identified from the input signal. The method includes: computing a spectrum F corresponding to a sum of the major echoes; computing a weighted power spectrum SM of the spectrum F; subtracting the weighted power spectrum SM from a weighted power spectrum PIN of the input signal to obtain a difference spectrum; performing a stabilized division of the…
Diode laser bar mounted on a copper heat-sink
Granted: April 7, 2015
Patent Number:
9001856
A diode-laser bar package includes a water cooled metal heat-sink. An electrical-insulator-plate is bonded to the heat-sink with a soft solder. A metal sub-mount and a first electrode are bonded, spaced apart, on the electrical-insulator-plate. A solder-bridge fills the space between the first electrode and the sub-mount. A diode-laser bar is bonded to the sub-mount. A second electrode is bonded to the first electrode with an electrically insulating bond. Electrical connection between…
Multi-stage MOPA with first-pulse suppression
Granted: March 31, 2015
Patent Number:
8995052
A solid-state MOPA includes a mode-locked laser delivering a train of pulses. The pulses are input to a fast E-O shutter, including polarization-rotating elements, polarizing beam-splitters, and a Pockels cell that can be driven alternatively by high voltage (HV) pulses of fixed long and short durations. A multi-pass amplifier follows the E-O shutter. The E-O shutter selects every Nth pulse from the input train and delivers the selected pulses to the multi-pass amplifier. The multi-pass…
Laser label-printer
Granted: March 24, 2015
Patent Number:
8988477
A laser label printer for use with a laser markable medium includes a laser-diode fiber-coupled to an optical train, which includes a focusing lens for focusing the radiation on the medium. The focusing lens is traversed across the medium, with incremental motion of the medium between traverses, for line by line printing of the label. The printer includes a feature for protecting the focusing lens from contamination, and self-diagnostic and adjustment features.
Bit-efficient control information for use with multimedia streams
Granted: March 17, 2015
Patent Number:
8984159
Bit efficient control information communication techniques. Control information for configuring an audiovisual device to present multimedia content may be generated. The control information may be organized according to a tree data structure having a plurality of nodes. The control information may include commands for navigating the nodes of the tree structure to locate data values stored at leaf nodes of the tree structure. Some commands may have associated data fields. Each command,…
Driving circuit for analog-modulated diode-laser
Granted: March 3, 2015
Patent Number:
8971364
A diode-laser is driven by a modulated voltage through a voltage-to-current converter. The modulated voltage has a fixed level determined by an applied fixed bias voltage and a variable level determined by a modulation voltage signal varying between minimum and maximum values. The fixed voltage level corresponds to a threshold level above which the diode-laser would provide laser-output. The modulation voltage signal is monitored and compared with a predetermined set value. If the…
Traveling-wave ring-oscillators without a faraday rotator
Granted: February 24, 2015
Patent Number:
8964802
A ring laser-resonator generating plane-polarized fundamental-frequency radiation includes an optically nonlinear crystal configured for type-II second-harmonic generation of fundamental-frequency radiation. The resonator is configured such that fundamental-frequency radiation circulating either clockwise or counter-clockwise therein makes two passes through the optically nonlinear crystal per round-trip in the resonator in opposite directions, with polarization planes perpendicular to…
Microcrystal laser for generating laser pulses
Granted: February 24, 2015
Patent Number:
8964800
A microcrystal laser for generating laser pulses has a laser resonator which has a laser medium arranged between two mirrors; and an arrangement for stabilizing the optical path length is provided. The laser resonator has a saturable absorber medium for pulse generation.
Multi-frequency clock skew control for inter-chip communication in synchronous digital systems
Granted: February 24, 2015
Patent Number:
8963599
Embodiments are disclosed of a multi-chip apparatus capable of performing multi-rate synchronous communication between component chips. Each chip may receive a common clock reference signal, and may generate an internal clock signal dependent on the clock reference signal. A clock distribution tree and phase-locked loop may be used to minimize internal clock skew at I/O circuitry at the chip perimeter. Each chip may also generate an internal synchronizing signal that is phase-aligned to…
Wavelength-stabilized microcrystal laser
Granted: February 3, 2015
Patent Number:
8948220
A microcrystal laser assembly including a gain-crystal includes a frame having a high thermal conductivity. The frame has a base with two spaced apart portions extending from the base. The gain-crystal has a resonator output minor on one surface thereof. The gain-crystal is supported on the spaced-apart portions of the frame in the space therebetween. Another resonator minor is supported in that space, spaced apart from the output mirror, on a pedestal attached to the base of the frame.…
Diffusion-cooled COlaser with flexible housing
Granted: January 27, 2015
Patent Number:
8942270
A gas includes a housing having a symmetrical arrangement of upper and lower cooling members for removing heat generated in a gas-discharge excited by an electrode assembly. The electrode assembly is clamped between the cooling members and is itself essentially symmetrically arranged. The cooling members and the electrode assembly are mechanically isolated in the housing by a surrounding diaphragm-like arrangement that connects the cooling members to side-walls of the housing. An RF…
Excimer laser apparatus projecting a beam with a selectively variable short-axis beam profile
Granted: January 20, 2015
Patent Number:
8937770
Apparatus for homogenizing and projecting two laser-beams is arranged such that the projected homogenized beams are aligned parallel to each other in a first transverse axis and partially overlap in second transverse axis perpendicular to the first transverse axis. The projected homogenized laser-beams have different intensities in the second axis and the degree of partial overlap is selected such that the combined intensity of the laser beams in the second axis has a step profile.
Enhanced optical pumping of materials exhibiting polarization-dependent absorption
Granted: December 16, 2014
Patent Number:
8913644
An optically pumped laser oscillator or amplifier includes a laser head having a gain medium exhibiting polarization-dependent absorption along two crystallographic axes and a pump source producing a pump beam. The medium's absorption coefficients along both said crystallographic axes are equal or the difference between the absorption coefficients relative to the lowest absorption coefficients R=Abs(?c??a)/(min(?c, ?a)) is reduced at least by a factor of two compared to the same relative…
Methods and apparatus related to a distal end of a side-fire optical fiber having multiple capillary components
Granted: December 16, 2014
Patent Number:
8911433
In one embodiment, an apparatus may include a first capillary component. A second capillary component may be disposed outside of the first capillary component and may have an inner surface, wherein a portion of the inner surface may be heat-fused to an outer surface of the first capillary component. The apparatus may also include a portion of an optical fiber disposed inside of the first capillary component and the portion of the optical fiber can have an outer surface. A portion of the…
Transition-metal-doped thin-disk laser
Granted: December 9, 2014
Patent Number:
8908737
A laser includes a Ti:sapphire gain-medium in the form of a thin-disk. The thin-disk gain-medium is optically pumped by pump-radiation pulses having a wavelength in the green region of the electromagnetic spectrum. The pump-radiation pulses have a duration less than twice the excited-state lifetime of the gain-medium.
Multi-chip OPS-laser
Granted: November 18, 2014
Patent Number:
8891563
A two-chip OPS laser includes first and second OPS-chips each emitting the same fundamental wavelength in first and second resonators. The first and second resonators are interferometrically combined on a common path terminated by a common end-mirror. The interferometric combination provides for automatic wavelength-locking of the laser, which can eliminate the need for a separate wavelength selective device in the laser.
Method and system for disabling communication paths in a multiprocessor fabric by setting register values to disable the communication paths specified by a configuration
Granted: November 4, 2014
Patent Number:
8880866
Disabling communication in a multiprocessor fabric. The multiprocessor fabric may include a plurality of processors and a plurality of communication elements and each of the plurality of communication elements may include a memory. A configuration may be received for the multiprocessor fabric, which specifies disabling of communication paths between one or more of: one or more processors and one or more communication elements; one or more processors and one or more other processors; or…
