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8184667 |
Electro-optic Bragg deflector and method of using it as laser Q-switch in an actively Q-switched laser and an actively Q-switched wavelength-conversion laser
The configurations of an electro-optic Bragg deflector and the methods of using it as a laser Q-switch in a Q-switched laser and in a Q-switched wavelength-conversion laser are provided. As a first...
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8175125 |
Laser device
A laser device includes an outcoupling mirror, a laser medium, a phase-conjugate mirror based on stimulated Brillouin scattering, and an end mirror all arranged along an optical axis of the laser...
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8155160 |
Method and device for igniting a fuel-air mixture in a combustion chamber of an internal combustion engine
A device is provided for igniting a fuel-air mixture in a combustion chamber of an internal combustion engine with the aid of electromagnetic radiation, in particular light. The device includes at...
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8139616 |
Pulsed light generator and pulsed fiber laser
A pulsed light generator of the invention includes: an excitation light source; a fiber grating into which excitation light from the excitation light source enters; a rare-earth doped optical fiber...
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8126023 |
Laser output switching by transverse mode modulation
A pulsed laser for machining, has a mode switch, e.g. Q-switch device (15, 30, 40), in a resonant optical cavity (20) capable of supporting a given lasing mode, e.g. a transverse mode of...
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8081670 |
System and method for providing chirped electromagnetic radiation
A system and method for controllably chirping electromagnetic radiation from a radiation source includes an optical cavity arrangement. The optical cavity arrangement enables electromagnetic...
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8081668 |
High energy pulse suppression method
A laser processes a workpiece with laser pulses delivered at random time intervals and at substantially constant energy levels by characterizing the laser cavity discharge behavior and utilizing...
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8050306 |
Acousto-optically Q-switched CO2 laser
A pulsed CO2 laser is Q-switched by an intracavity acousto-optic (AO) Q-switch including an AO material transparent at a fundamental wavelength of the laser. In one example the AO material is...
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8036253 |
Resonant Fabry-Perot semiconductor saturable absorbers and two photon absorption power limiters
An intracavity resonant Fabry-Perot saturable absorber (R-FPSA) induces modelocking in a laser such as a fiber laser. An optical limiter such as a two photon absorber (TPA) can be used in...
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8031749 |
Passively Q-switched microlaser with controllable peak power density
Geometrical design of laser microchips is disclosed that allows variation of the optical path length in the different media by simple displacement of the microchip, the movement having a non-zero...
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8018979 |
Mode-locked short pulse laser resonator and short pulse laser arrangement
A mode-locked short pulse laser resonator including a pump laser beam input, a non-linear laser medium, a plurality of resonator mirrors as well as a first outcoupler mirror and a second outcoupler...
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8000373 |
Methods and apparatus for generating RGB laser light
A dual-cavity single longitudinal mode (SLM) laser oscillator generates a pulsed laser signal having a long pulsewidth, long coherence length, and good shot-to-shot energy stability. The laser...
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7995638 |
High power, end pumped laser with off-peak pumping
A laser configuration producing up to 100's of Watts of output is provided, based on a solid-state gain medium, a source of pump energy which is detuned from the maximum absorption wavelength for...
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7970031 |
Q-switched laser with passive discharge assembly
Embodiments of the invention concern a passive discharge assembly comprising one or more substantially sharp electrode pins that are positioned proximate to a charged, insulating surface, such as...
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7970026 |
Multiple output repetitively pulsed laser
A continuously pumped, mode-locked laser is disclosed, which includes a cavity dumper that can remove a constant fraction of the light from the cavity at every 1/f period of time, independent of...
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7961772 |
Optimized pulse pumped laser system using feedback
A laser system according to the invention comprises pump generating means (x02, x03) for generating at least a first and a second, preferably focused, pump beam, and lasing means (x06, x07) for...
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7961763 |
System for detection of wafer defects
Fast on-line electro-optical detection of wafer defects by illuminating with a short light pulse from a repetitively pulsed laser, a section of the wafer while it is moved across the field of view...
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7949021 |
Light source apparatus
The present invention relates to a light source apparatus having a structure to enable a short pulse optical output with high pulse energy or a high pulse peak equivalent to that of a Q switch...
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7924892 |
Fiber amplifier based light source for semiconductor inspection
A laser illuminator for use in an inspection system, such as a semiconductor wafer inspection system or photomask inspection system is provided. The gain medium in the illuminator comprises optical...
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7903699 |
Acousto-optically Q-switched CO2 laser
A pulsed CO2 laser is Q-switched by an intracavity acousto-optic (AO) Q-switch including an AO material transparent at a fundamental wavelength of the laser. In one example the AO material is...
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7876803 |
High-power, pulsed ring fiber oscillator and method
A ring laser includes a large-core rare-earth-doped fiber ring-connected with a free-space path having an electro-optic switch, output coupler, and intracavity band-pass filter to enforce lasing...
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7876794 |
Laser light source
The present invention discloses a laser light source for implementing pulsed oscillation of laser light, which has a laser cavity in which a laser medium for generating emitted light with supply of...
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7860135 |
Low loss crystal as a large aperture AO deflector
An acousto-optic deflector includes a body of material through which a laser beam to be modulated passes. The material has an acoustic attenuation in the range of 0.15 to 1.0 dB/μs-GHz2 and ...
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7839904 |
Monoblock laser systems and methods
Systems and methods are disclosed herein to provide monoblock lasers that may provide improved performance and/or reduce manufacturing costs. For example, in accordance with an embodiment of the...
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7830581 |
Method and system for laser amplification using a dual crystal pockels cell
A system for laser amplification includes a dual-crystal Pockels cell which is used to control emission of laser pulses from an ultra-fast laser. The Pockels cell is constructed to enable...
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7817685 |
Methods and systems for generating pulse trains for material processing
Systems and methods generate laser pulse trains for material processing. In one embodiment, stable laser pulse trains at high repetition rates are generated from a continuous wave (CW) or quasi-CW...
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7810462 |
Method for operating an ignition device for an internal combustion engine
A method for operating an ignition device for an internal combustion engine, particularly of a motor vehicle, having a laser device which has a laser-active solid that has a passive Q-switch. The...
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7813387 |
Optical system for providing short laser-pulses
The present invention deals with optical systems for providing short laser pulses. An object of the invention is to provide an optical system providing compact and cost-effective short laser-pulses...
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7769059 |
High power Q-switched laser for soft tissue ablation
The present invention discloses a high power Q-switched, intracavity frequency-doubled laser for laser ablation of soft tissue. Operating a high power Q-switched laser in a frequent on-off mode is...
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7760772 |
Cavity-dumped pulsed solid-state laser with variable pulse-duration
In a cavity-dumped, repetitively-pulsed, solid-state laser cavity dumping is protracted over a predetermined time longer than a round-trip time of the resonator of the laser. The cavity dumping is...
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7756167 |
Q-switched laser
A system for producing a laser light pulse is disclosed. The system includes a travelling wave or ring laser incorporating a gain medium with polarizing means for introducing substantially...
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7742508 |
Electro-optic deflector
An electro-optic deflector 51 has an electro-optic material body 519 through which an optical beam 46 is passed. The deflector has no more than three longitudinal electrodes, of which no more than...
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7729392 |
Monoblock laser with reflective substrate
In an internal OPO, a substrate comprising a thin film lies along an axis and a first mirror reflects first wavelength light. A gain medium lases and polarizes light entering therein and a Q-switch...
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7729393 |
Surface emitting laser with an integrated absorber
A surface emitting laser (SEL) with an integrated absorber. A lower mirror and an output coupler define a laser cavity of the SEL. A monolithic gain structure positioned in the laser cavity...
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7724785 |
Multiple pulsed-laser system for silicon crystallization
Multiple laser resonators share a common acousto-optic Q-switch. The Q-switch is driven by a radio-frequency (RF) transducer that causes an acoustic wave to propagate in the Q-switch. Turning off...
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7668212 |
Optically triggered Q-switched photonic crystal laser and method of switching the same
An improvement in a method of controlling lasing in a semiconductor laser fabricated in a photonic crystal laser having a plurality of holes into which a birefringent material with low refractive...
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7664148 |
Passive Q switch laser device
A laser apparatus 10 includes: a laser medium 11 arranged between a pair of reflecting means 12A and 12B of an optical resonator 12 and adapted to be excited to emit light; a saturable absorber 14...
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7656913 |
Fiber pulse laser apparatus and method of controlling the same
A method of controlling a pulse output in a master oscillator-power amplifier type fiber pulse laser apparatus including a master oscillator unit and a power amplifier unit connected to the master...
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7649920 |
Q-switched microlaser apparatus and method for use
A monolithic passively Q switched microlaser includes an optically transparent heat conductive element bonded to a gain medium, which is in turn bonded to a saturable absorber, which may also be...
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7616669 |
High energy pulse suppression method
A laser processes a workpiece with laser pulses delivered at random time intervals and at substantially constant energy levels by characterizing the laser cavity discharge behavior and utilizing...
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7606274 |
Mid-IR instrument for analyzing a gaseous sample and method for using the same
An optical nose for detecting the presence of molecular contaminants in gaseous samples utilizes a tunable seed laser output in conjunction with a pulsed reference laser output to generate a...
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7599407 |
Laser control method, laser apparatus, laser treatment method used for the same, laser treatment apparatus
A laser controlling method can generate laser of stable laser pulses, and eliminate useless time from a machining procedure. The method uses a gain medium and a Q-switch, and emits exciting light...
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7586957 |
Picosecond laser apparatus and methods for its operation and use
Apparatuses and methods are disclosed for applying laser energy having desired pulse characteristics, including a sufficiently short duration and/or a sufficiently high energy for the...
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7586958 |
Electro-opto switching of unpolarized lasers
A method and apparatus for switching an unpolarized pulsed laser is disclosed. An example is a laser system having a source for producing input energy in response to an input drive signal. A laser...
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7577178 |
Narrow linewidth injection seeded Q-switched fiber ring laser based on a low-SBS fiber
A narrow linewidth injection-seeded Q-switched fiber ring laser based on a low-SBS optical fiber. High peak powers are achieved through the use of a single-clad erbium doped fiber with an acoustic...
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7548671 |
Optical device including waveguide grating structure
Optical devices including waveguide grating structures are described. In accordance with one embodiment, an optical device is provided comprising a horizontal waveguide grating structure having at...
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7522642 |
Method and system for laser amplification using a dual crystal Pockels cell
A system for laser amplification includes a dual-crystal Pockels cell which is used to control emission of laser pulses from an ultra-fast laser. The Pockels cell is constructed to enable...
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7519252 |
Laser annealing apparatus
A laser annealing apparatus comprises a laser oscillator having a Q switching action, one or a plurality of partially reflective mirrors for split a laser beam emitted from the laser oscillator...
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7499477 |
Internal combustion engine
The invention relates to an internal combustion engine with a laser ignition device (1), Q-switched, pumped solid-state laser with a pulsed pumped light source (30), a solid laser crystal (2),...
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7480321 |
Vertical external cavity surface emitting laser (VECSEL) having modulating mirror and display apparatus employing the same
A vertical external cavity surface emitting laser (VECSEL) having an improved mirror that forms an external cavity to modulate an emitted laser beam and display apparatus employing the same are...
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