MACRO-CHANNEL WATER-COOLED HEAT-SINK FOR DIODE-LASER BARS
Granted: May 1, 2014
Application Number:
20140119394
A water-cooled heat-sink for a diode-laser bar includes a copper-cooling-unit having an integral mount thereon for the diode-laser bar. The copper-cooling-unit is attached to a steel base-unit. The base-unit and the cooling-unit are cooperatively configured such that at least one cooling-channel is formed in the cooling-unit by the attachment of the base-unit to the cooling-unit. The cooling-channel is positioned to cool the mount when cooling-water flows through the cooling-channel.
WAVELENGTH-STABILIZED FREQUENCY-CONVERTED OPTICALLY PUMPED SEMICONDUCTOR LASER
Granted: April 3, 2014
Application Number:
20140092926
A frequency-doubled OPS-laser having a desired output wavelength of 532 nm is tunable about that wavelength by a temperature tuned birefringent filter (BRF). The temperature of the BRF is varied while measuring transmission of a sample of the output through a Nd:YAG crystal having an absorption peak at a wavelength of about 532.4 nm. The peak is detected as a minimum of transmission and the temperature at which that minimum occurs is recorded. From wavelength-change-versus-temperature…
UNIFORMITY ADJUSTMENT METHOD FOR A DIODE-LASER LINE-PROJECTOR
Granted: March 27, 2014
Application Number:
20140085616
In a line projector a diode-laser beam having an elliptical cross-section is projected onto a Powell lens which spreads the beam to form a line of light. Distribution of power along the line of light is adjusted by rotating the diode-laser beam with respect to the Powell lens.
SELECTIVE MULTI-MODAL TRANSMISSION ALTERATION
Granted: March 20, 2014
Application Number:
20140079053
System and methods for an interface alteration device placed between a first segment and a second segment of a communication line of a vehicle. The interface alteration device identifies portions of an incoming data stream that are to be transmitted to a second interface alteration device and causes the identified portions to be transmitted to the second interface alteration device; identifies portions of the incoming data stream that are to be replaced by data received over a data link…
Wireless Transport Framework with Variable Frequency Domain Training
Granted: March 13, 2014
Application Number:
20140075489
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…
WAVEGUIDE CO2 LASER WITH MULTIPLY FOLDED RESONATOR
Granted: March 6, 2014
Application Number:
20140064318
A gas-discharge waveguide CO2 laser has a Z-shaped folded waveguide formed by three ceramic tubes. Ends of the adjacent tubes are shaped and fitted together to form a common aperture. The tubes are held fitted together by spaced-apart parallel discharge electrodes. Four minors are arranged to form a laser-resonator having a longitudinal axis extending through the tubes.
EXCIMER LASER APPARATUS PROJECTING A BEAM WITH A SELECTIVELY VARIABLE SHORT-AXIS BEAM PROFILE
Granted: January 30, 2014
Application Number:
20140027417
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.
MULTI-CHIP OPS-LASER
Granted: January 16, 2014
Application Number:
20140016657
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.
OPTICAL PARAMETRIC OSCILLATOR PUMPED BY FEMTOSECOND THIN-DISK LASER
Granted: January 9, 2014
Application Number:
20140009821
Pulses from a mode-locked Yb-doped laser (12) are spectrally broadened in an optical fiber (28), and temporally compressed in a grating compressor (32), then frequency-doubled (34) and used to pump an optical parametric oscillator (OPO) (40). The OPO output is tunable over a wavelength range from about 600 nm to about 1100 nm. Mode-locking in the Yb-doped laser (12) is accomplished with a SESAM (14) or by Kerr-lens mode-locking with a Kerr medium (82) and a hard aperture (84).
ENHANCED OPTICAL PUMPING OF MATERIALS EXHIBITING POLARIZATION-DEPENDENT ABSORPTION
Granted: December 12, 2013
Application Number:
20130329762
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…
Developing a Hardware Description Which Performs a Function by Partial Hardening of a Software Program on a Multi-Processor System
Granted: October 24, 2013
Application Number:
20130283220
System and method for developing an ASIC. A software program may be stored which includes program instructions which implement a function. The software program may be executed on a processing system at a desired system speed and may be validated based on the execution. A first hardware description of at least a portion of the processing system may be stored and may specify implementation of at least a portion of the processing system. A second hardware description may be generated that…
PULSED CO2 LASER OUTPUT-PULSE SHAPE AND POWER CONTROL
Granted: October 17, 2013
Application Number:
20130272325
In order to maintain a constant laser output pulse power in a RF-energized, sealed-off, diffusion cooled, pulsed, CO2 gas-discharge laser, each laser output pulse is generated by train or burst of shorter RF pulses. When the time between laser output pulses becomes short enough that the power in one pulse would be reduced by gas-discharge heating effects of a previous pulse, power in the RF pulse trains is varied by varying the duration or duty cycle of pulses in the bursts, thereby…
COMPOUND ENCLOSURE FOR OPTICAL APPARATUS
Granted: October 3, 2013
Application Number:
20130259076
An optically pumped semiconductor laser is assembled in an enclosure comprising a base, a first mounting frame attached to the base, a second mounting frame attached to the first mounting frame and a cover attached to the second mounting frame. The assembly base, frames, and cover forms an undivided enclosure, with the frames contributing to walls of the enclosure. Components of the laser are assembled sequentially on the base and the frames. The frames are irregular in height to permit…
COMPACT CO2 SLAB-LASER
Granted: October 3, 2013
Application Number:
20130259074
A compact CO2 slab-laser is contained in a fluid cooled housing having three compartments. One compartment houses discharge electrodes and a laser resonator. Another compartment houses a radio-frequency power supply (RFPS) assembled on a fluid-cooled chill plate and an impedance-matching network. The remaining compartment houses beam-conditioning optics including a spatial filter. The housing and RFPS chill-plate are on a common coolant-fluid circuit having a single input and a single…
Processing System With Interspersed Processors and Communication Elements Having Improved Wormhole Routing
Granted: September 26, 2013
Application Number:
20130254515
A processing system includes processors and dynamically configurable communication elements (DCCs) coupled together in an interspersed arrangement. A source device may transfer a data item through an intermediate subset of the DCCs to a destination device. The source and destination devices may each correspond to different processors, DCCs, or input/output devices, or mixed combinations of these. In response to detecting a stall after the source device begins transfer of the data item to…
Estimation of Low-Amplitude Echoes in a Received Communication Signal
Granted: August 29, 2013
Application Number:
20130223504
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…
OUTPUT-POWER CONTROL APPARATUS FOR A CO2 GAS-DISCHARGE LASER
Granted: August 8, 2013
Application Number:
20130202004
A carbon-dioxide CO2 gas-discharge laser is energized by the output a radio-frequency power supply (RFPS). Output-power of the laser is stabilized by adjustments of the RFPS responsive to periodic measurements of the laser output-power using detector output amplified by an amplifier. The amplifier has an offset-voltage which is subject to drift. A synchronous auto-zero arrangement is provided for canceling out the offset-voltage of the amplifier immediately prior to each periodic…
ATHERMALIZED PERMANENT-ALIGNMENT OPTICAL-ELEMENT MOUNT
Granted: August 8, 2013
Application Number:
20130200062
A mounting fixture for mounting an optical element on a base-plate has spaced-apart parallel legs attachable by brackets to the base-plate and a mounting platform attached to the legs. The platform can be heated by a removable heater. The optical element is held in a mounting tab attached to the platform by a solder-pad. Heating the platform softens the solder-pad allowing the tab and the element to be aligned. Removing the heat allows the pad to harden to complete the attachment and…
FREQUENCY-TRIPLED FIBER-MOPA
Granted: July 25, 2013
Application Number:
20130188658
In a frequency-tripled fiber-MOPA, a pre-amplified plane-polarized seed-pulse having a fundamental frequency is divided into two pulse-components, plane-polarized in polarization-orientations at 90-degrees to each other. The fundamental-wavelength pulse-components are amplified in a common amplifier-fiber. The amplified components are separately propagated on different optical paths. One of the amplified components is frequency-doubled. The frequency-doubled component on one path and…
CARRIER-ENVELOPE-PHASE STABILIZATION OF A MASTER OSCILLATOR OPTICAL AMPLIFIER SYSTEM
Granted: July 4, 2013
Application Number:
20130170510
A laser and amplifier combination delivers a sequence of optical pulses at a predetermined pulse-repetition frequency PRF. An interferometer generates a signal representative of the carrier-envelope phase (CEP) of the pulses at intervals corresponding to the PRF. The signal includes frequency components from DC to the PRF. The signal is divided into high and low frequency ranges. The high and low frequency ranges are sent to independent high frequency and low frequency control…
