Entries |
Document | Title | Date |
20080225903 | UNSTABLE MONOBLOCK LASER CAVITY WITH INTEGRATED BEAM EXPANDER - A monoblock laser cavity includes a plurality of discrete optical components disposed serially on a substrate and sharing a common optical axis. The optical components include a laser rod of gain material, a Q-switch, an OPO crystal, an output coupler, and a positive lens. The output coupler has a convex input end face and a concave output end face, and acts as the expanding lens element of a beam expander, and the positive lens completes the beam expander to improve the beam quality. | 09-18-2008 |
20080247425 | 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 bonded to a second optically transparent heat conductive element. Only the gain medium and saturable absorber are disposed within the laser resonator. | 10-09-2008 |
20080285600 | Laser System for Hard Body Tissue Ablation - A laser system for hard body tissue ablation has a pumped laser, wherein the laser system is operated in pulsed operation with several individual pulses of a temporally limited pulse length and wherein the individual pulses follow one another with temporal pulse spacing. The pumped laser has an inversion population remaining time, the inversion population remaining time being the time within which, in the absence of pumping, the remaining inversion population of the laser energy status is reduced by 90%. The pulse spacing is in the range of ≧50 μs and ≦ to the inversion population remaining time. | 11-20-2008 |
20080291947 | Laser Arrangements and Methods - A method for preventing spatial or spectral beam seeding in a Q-switched laser is described. The Q-switch trigger of the laser is delayed by several laser resonator lifetimes after the end of the pump pulse. In this way, beam seeding is completely eliminated whilst pre-lase is maintained. The method described may be used for any laser system where the fall time of the pump radiation is sufficiently fast with respect to the upper state lifetime of the laser medium. | 11-27-2008 |
20080291948 | Monolithic diode-pumped laser cavity - A monolithic pumped laser cavity design is disclosed. Elements of the laser cavity, such as gain material, Q-switch, reflector, and outcoupler, are contact bonded together with a thermally conductive epoxy. The assembly is then operatively coupled to a heat sink (e.g., by mechanical or chemical means). The assembly is potted in thermally conductive potting material. The stacked elements or a subset thereof may be bonded to heat sink mounts and/or face cooling layers. In this fashion, various elements can be easily assembled and bonded together to provide the desired combination of laser energy, pulse width, and repetition frequency. The thermally conductive potting material provides structural integrity, as well as thermal management by extracting heat from the encased assembly to the heat sink. The optional heat sink mounts and face cooling operate to further extract heat and reduce thermal loading. Outcoupling to fiber may also be provided. | 11-27-2008 |
20080317072 | Compact solid-state laser - A compact optically-pumped solid-state laser designed for efficient nonlinear intracavity frequency conversion into desired wavelengths using periodically poled nonlinear crystals. These crystals contain dopants such as MgO or ZnO and/or have a specified degree of stoichiometry that ensures high reliability. The laser includes a solid-state gain media chip, such as Nd:YVO | 12-25-2008 |
20090129413 | 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 oscillator has a first cavity between an output coupler and a rear mirror and a second cavity between the output coupler and an intra-cavity mirror disposed between the output coupler and rear mirror. High-loss cavity optics and a passive Q-switch achieve a very high number of round trips that reduce the number of cavity modes down to two or three. The dual cavity design further discriminates between the remaining modes and allows SLM operation. The laser oscillator and an amplifier can be used as a pump laser for a laser system that generates red, green, and blue pulses for holographic recording. A wavelength conversion stage uses optical parametric amplifier(s), doubling crystals, and sum-frequency mixers to produce RGB light from the pump pulses. | 05-21-2009 |
20090135858 | LASER OSCILLATION APPARATUS AND CONTROLLING METHOD THEREOF - An aspect of the present invention provides a laser oscillation apparatus in which a control circuit can be simplified to variably control a Q switch pulse width with low cost and a controlling method thereof. A laser oscillation apparatus according to an aspect of the present invention includes a laser oscillator head, a Q switch pulse width setting circuit, an LD current control circuit, an LD driver, an RF amplitude control circuit, and an RF driver. The laser oscillator head includes an internal AOQ-SW element, and an excitation LD. The LD current control circuit and the LD driver controls a current applied to excitation LD such that the current becomes not more than a laser oscillation threshold in synchronization with timing when an optical resonator of the laser oscillator head oscillates one-time or plural-time Q switch pulse. | 05-28-2009 |
20090141746 | SOLID-STATE LASER DEVICE - In a solid-state laser device, a single outer casing ( | 06-04-2009 |
20090154504 | Laser Processing Apparatus, Laser Processing Method, and Method For Making Settings For Laser Processing Apparatus - It is an object to enable easily adjusting a focus position for coping with thermal lens effects. There is provided a laser-light scanning portion including a Z-axis scanner capable of adjusting the focus position of laser light in the direction of the optical axis, an X-axis scanner and a Y-axis scanner. Further, there are provided a laser driving control portion for controlling a laser oscillation portion and the laser-light scanning portion, a processing-condition setting portion for setting a laser-light outputting condition and a processing pattern as processing conditions for processing in a desired processing pattern, and an amount-of-correction identification section for identifying, as an amount of focus-position correction, the deviation of the focus position in the direction of the optical axis which is caused by thermal lens effects induced based on the laser-light outputting condition set by the processing-condition setting portion. During irradiation of the laser light, the laser driving control portion scans the laser light, in such a way as to add the amount of focus-position correction identified by the amount-of-correction identification section to the processing condition set by the processing-condition setting portion. | 06-18-2009 |
20090219955 | LASER OSCILLATION METHOD, LASER, LASER PROCESSING METHOD AND LASER MEASUREMENT METHOD - The present invention relates to a laser oscillation method for effectively suppressing fluctuations in pulse widths. The laser oscillation method oscillates a pulsed beam in a laser that comprises pumping means, a resonator, Q-switching means and a controller. The pumping means continuously supplies pumping light to a gain medium, which is arranged on the resonating optical path of the resonator and generates emission light by being supplied with pumping energy. The Q-switching means modulates the resonator losses of the resonator. The controller controls an extinction ratio of Q-switching means to a value that has been selected in accordance with the frequency of repeat use in the pulsed beam such that fluctuations in the full width at half maximum of a pulsed beam outputted from the laser are within a prescribed range of the region of frequency of repeat use used by the Q-switching means. | 09-03-2009 |
20090285248 | UV LIGHT GENERATION BY FREQUENCY CONVERSION OF RADIATION OF A RUBY LASER PUMPED WITH A SECOND HARMONIC OF A SOLID-STATE LASER - A system and method for generating ultraviolet laser radiation by pumping a ruby based active laser medium in a second complex laser cavity with an output from a first complex laser cavity. The laser system includes a first complex optical cavity a second complex optical cavity, an output from the first complex optical cavity at a second harmonic of the first fundamental frequency pumps a ruby based active medium of the second complex optical cavity. In some embodiments, the ruby based active medium can be Cr:Al | 11-19-2009 |
20090290605 | Compact, Efficient and Robust Ultraviolet Solid-State Laser Sources Based on Nonlinear Frequency Conversion in Periodically Poled Materials - A compact and efficient ultraviolet laser source based on a optically-pumped solid-state or fiber laser that produces near-infrared output light suitable for nonlinear frequency conversion. The infrared laser output is frequency tripled or quadrupled to produce light in the ultraviolet wavelength range (200 nm to 400 nm). The novel technology is the use of highly efficient periodically poled nonlinear crystals, such as stoichiometric and MgO-doped lithium tantalate and lithium niobate. As opposed to conventional frequency-converted UV laser sources, which have high power consumption, high cost, and low efficiency, the laser sources of this invention utilize high efficiency nonlinear conversion provided by periodically poled materials and allow lower-cost architectures without additional focusing lenses, high power pump diodes, etc. | 11-26-2009 |
20090304033 | LASER FOR GENERATING MULTIPLE WAVELENGTHS - A laser comprising: a first reflector and a second reflector defining a first resonator cavity; a third reflector defining a second resonator cavity with the first reflector; a laser material disposed such that it is located in both the first and the second resonator cavities, the laser material being capable of generating at least a first and a second wavelength of laser light when pumped by pump radiation from a pump source located external to the first and second resonator cavities; wherein the first reflector is adapted to reflect the first wavelength of laser light into the first resonator cavity and the third reflector is adapted to reflect the second wavelength of laser light into the second resonator cavity. | 12-10-2009 |
20100002731 | LASER LIGHT SOURCE DEVICE AND LASER IRRADIATION APPARATUS USING THE SAME - A laser light source device includes a pump light source which emits transverse-multimode light; a plurality of resonator mirrors which define a resonator, at least part of the resonator mirrors outputting light to the outside, where the output light having plural wavelengths; a laser medium arranged in the resonator, the laser medium being pumped with the transverse-multimode light emitted from the pump light source; and a wavelength conversion element arranged in the resonator, the wavelength conversion element being irradiated with a transverse-multimode line beam of fundamental wave obtained by oscillation at the laser medium and outputting a line beam of converted wave. | 01-07-2010 |
20100046561 | 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 that information for adjusting dummy pulse time periods to compensate for the energy errors. Dummy pulses are laser pulses that are blocked from reaching a workpiece. A second way for providing constant pulse energies employs an AOM for varying amounts of laser energy passed to the workpiece. A third way of providing constant pulse energies entails extending the pulse period of selected pulses to allow additional laser cavity charging time whenever a dummy pulse is initiated. | 02-25-2010 |
20100098115 | 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 effected by a Pockels cell optical switch. During a dumping period a voltage applied to the Pockels cell falls in a predetermined time. Varying the voltage fall-time varies the duration of pulses provided by the laser, independent of the pulse-repetition frequency. | 04-22-2010 |
20100098116 | Optimized signal control in frequency-doubled laser sources - The present disclosure relates generally to semiconductor lasers and laser projection systems. According to one embodiment of the present disclosure, a method of operating a laser projection system is provided. According to the method, the laser projection system is utilized to display a sequence of pixelized image frames comprising an alternating sequence of relatively high intensity active projection periods Mod | 04-22-2010 |
20100158054 | LASER SYSTEM WITH PICOSECOND PULSE EMISSION - The invention relates to a device ( | 06-24-2010 |
20100189140 | Laser Diode End Pumped Monoblock Laser - A monoblock laser that has a laser cavity having a laser gain material, a Q switch optically coupled to the laser gain material, and an OPO material optically coupled to the Q switch. A laser pump is spaced from an end of the laser cavity. The laser pump has an output that is absorbed along an entire length of the laser cavity providing athermal operation without temperature control of the laser pump over the operating range of the monoblock laser. | 07-29-2010 |
20100195679 | Solid-state laser comprising a resonator with a monolithic structure - The invention relates to a solid-state laser, comprising a resonator ( | 08-05-2010 |
20100226396 | Optical Arrangement For Pumping Solid-State Lasers - In an optical arrangement for pumping solid-state lasers, there is the object of producing an intensity distribution across the beam cross section of the pump radiation with a rectangular intensity profile, which intensity distribution is homogeneous at least in a region corresponding to the Rayleigh range in the direction of the beam propagation without the beam quality being substantially impaired by the homogenization. The pump arrangement contains a rod-shaped homogenizer ( | 09-09-2010 |
20100246610 | Mid-IR Laser 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 mid-range IR laser output in the 2 to 20 micrometer range for use as a discriminating light source in a photo-acoustic gas analyzer. | 09-30-2010 |
20100254413 | SEMICONDUCTOR LASER EXCITED SOLID-STATE LASER DEVICE - To make it possible to use a type I nonlinear optical crystal or a quasi phase matching element as a third harmonic generation crystal there is provided a semiconductor laser, a solid state laser medium that outputs a fundamental wave, a second harmonic generation crystal that outputs a second harmonic wave from the fundamental wave, and a third harmonic generation crystal that outputs a third harmonic wave from the fundamental wave and the second harmonic wave. A quasi phase matching elements is utilized as the second harmonic generation crystal. It is possible to use a type I nonlinear optical crystal or a quasi phase matching element as the third harmonic generation crystal. | 10-07-2010 |
20100272130 | HIGH-EFFICIENCY Ho:YAG LASER - A laser assembly and method of operating the assembly are described in which a pump beam is directed through an end-pumped solid-state laser gain medium four or more times. The pump beam is directed at a slight angle through a first end of the medium, reflects off the inner surface of the second, opposite end (to form a “V”), and then reflected by an external or integrated mirror back through the first end and off the inner surface of the opposite end again (back through the “V”). | 10-28-2010 |
20100296530 | METHOD FOR OPERATING AN IGNITION DEVICE, AND AN IGNITION DEVICE - In a method for operating an ignition device for an internal combustion engine, in particular of a motor vehicle, having a laser device which includes a laser-active solid having a passive Q-switching system as well as an optical amplifier connected downstream from the passive Q-switching system ( | 11-25-2010 |
20110075687 | SCALABLE, EFFICIENT LASER SYSTEMS - A laser comprises an end pump light source and a gain medium having a first end, a second end, and four sides comprising a first, a second, a third, and a fourth side. The end pump light source is optically coupled to the first end and pumps the gain medium. The first side and the third side are tapered inwardly from the first end to the first end to the second end at a taper angle β relative to a longitudinal lasing axis and have a polished finish capable of reflecting light inside the gain medium. The second side and the fourth side are substantially parallel to the longitudinal lasing axis have a ground blasted finish. The first side is also tilted inwardly at a slant angle α from the fourth side to the second side. A laser beam R | 03-31-2011 |
20110122895 | Q-SWITCHED OSCILLATOR SEED-SOURCE FOR MOPA LASER ILLUMINATOR METHOD AND APPARATUS - An apparatus, method and system that uses a Q-switched laser or a Q-seed source for a seed pulse signal having a controlled high-dynamic-range amplitude that avoids and/or compensates for pulse steepening in high-gain optical-fiber and/or optical-rod amplification of optical pulses. Optionally, the optical output is used for LIDAR or illumination purposes (e.g., for image acquisition). In some embodiments, well-controlled pulse shapes are obtained having a wide dynamic range, long duration, and not-too-narrow linewidth. In some embodiments, upon the opening of a Q-switch in an optical cavity having a gain medium, the amplification builds relatively slowly, wherein each round trip through the gain medium increases the amplitude of the optical pulse. Other embodiments use quasi-Q-switch devices or a plurality of amplitude modulators to obtain Q-seed pulses. These configurations provide optical pulses having wide dynamic ranges that ameliorate problems of pulse steepening, non-linear spectral broadening and the like in very-high-power MOPA devices. | 05-26-2011 |
20110206069 | Blue Dysprosium Laser - A quasi-three level laser system having crystalline YAG or YLF doped with trivalent Dysprosium can be pumped with a laser diode in the UV, and produce a pulsed laser blue emission from the 4 F | 08-25-2011 |
20110286476 | Suppression of Parasitic Lasing - A laser gain medium crystal comprising a square rod of laser gain medium material having top and bottom surfaces that are finely ground to introduce scattering surfaces to cancel parasitic lasing. The square rod of laser gain material has input and output faces and side surfaces, and portions of the side surfaces near the output face of the square rod are finely ground to introduce scattering surfaces to cancel parasitic lasing. The rest of the side surfaces of the square rod are polished. | 11-24-2011 |
20120002685 | HIGH VOLTAGE SWITCH WITH ADJUSTABLE CURRENT - The present disclosure relates to a high voltage switch which may comprise a chain of MOS field-effect transistors (MOSFETs). The current of the individual MOSFETS, and hence the chain, can be controlled by means of adding a current measuring resistance into the source path of the transistors and transmitting the voltage arising there via a capacitor to a gate connector of the transistors. | 01-05-2012 |
20120020378 | WIDELY TUNABLE OPTICAL PARAMETRIC GENERATOR HAVING NARROW BANDWIDTH FIELD - Systems, methods and apparatus are provided through which in some implementations mode selection and wavelength tuning of optical parametric generation is achieved through intrinsic nonlinear crystal dispersion. | 01-26-2012 |
20120027034 | Beam Quality of the Monoblock Laser Through Use of a 1.5 Micron External Cavity Partial Reflector - A monoblock laser cavity incorporates optical components for a short-pulse laser. These optical components are ‘locked’ into alignment forming an optical laser cavity for flash lamp or diode laser pumping. The optical laser cavity does not need optical alignment after it is fabricated, increasing the brightness of the monoblock laser. | 02-02-2012 |
20120044959 | TERAHERTZ SOURCE - An optical system includes a first gain medium configured to be excited by an energy source and in response generate a first optical signal having first and second wavelengths. A Q-switch is disposed adjacent to the first gain medium for generating a pulsed optical signal in response to receiving the first optical signal. A non-linear optical crystal is configured to output a second optical signal having a frequency based on difference frequency generation of the first and second wavelengths of the pulsed optical signal. | 02-23-2012 |
20120057608 | INTRA-CAVITY SUM-FREQUENCY MIXING USING SOLID-STATE AND SEMICONDUCTOR GAIN-MEDIA - A two-resonator laser arrangement for provides visible-wavelength radiation by sum-frequency mixing two different wavelengths of radiation circulating in the resonators in an optically nonlinear crystal located in the resonators. One of the resonators includes a solid-state gain-medium providing of one the two wavelengths and the other resonator includes a semiconductor gain-medium providing the other of the two wavelengths. A very short excited-state lifetime of the semiconductor gain-medium provides that noise and instability commonly encountered in the output of prior-art intra-resonator frequency-converted lasers is substantially reduced. | 03-08-2012 |
20120140782 | LOW TIMING JITTER, SINGLE FREQUENCY, POLARIZED LASER - A laser system includes a first laser diode configured to generate first light in a first direction along an optical path; a laser resonator having a gain medium, anisotropic saturable absorber, and a wavelength selective outcoupler positioned in the optical path upon which the first light impinges a first side thereof so as to pump the gain medium (first light from the first laser diode is absorbed in the gain medium), a second laser diode configured to generate second light in a second direction along the optical path toward a second side of the resonator, passes through the wavelength selective outcoupler unimpeded and is absorbed by the saturable absorber element, wherein the second light has a polarization corresponding to the orientation of the saturable absorber; the wavelength selective outcoupler is configured to only allow third light of a predetermined wavelength to have feedback in the laser resonator, achieve gain in the resonator, and be emitted from the laser resonator. A method for forming a laser system is also described. | 06-07-2012 |
20120163403 | COMPACT AND EFFICIENT VISIBLE LASER SOURCE WITH HIGH SPEED MODULATION - A compact optically-pumped solid-state laser designed for efficient nonlinear intracavity frequency conversion into desired wavelengths using periodically poled nonlinear crystals. These crystals contain dopants such as MgO or ZnO and/or have a specified degree of stoichiometry that ensures high reliability. The laser includes a solid-state gain media chip, such as Nd:YVO | 06-28-2012 |
20120219021 | Laser Display Method and System - A laser display system and method that includes some or all of the following parts: an optical apparatus that includes two spatial light modulators and a laser, and switches the laser between the light modulators; two lasers that combine pulses to illuminate one spatial light modulator; controlling a laser Q-switch to stay in CW mode for variable periods of time to generate variable-amplitude pulses; and loading and resetting a digital micromirror device between pulses of light. | 08-30-2012 |
20120263199 | Laser Emitting Pulses of Variable Period and Stabilized Energy - A laser device suitable for emitting pulses with a variable period and with stabilized energy includes: a resonant cavity including an amplifying medium presenting a stabilized gain G and suitable for emitting laser pulses at a wavelength λ, and a Q-switch, and a source of continuous pumping of the amplifying medium. It furthermore includes an injector positioned outside the resonant cavity, suitable for emitting a beam of wavelength λ into the amplifying material for the duration of the pumping, and which includes means for adjusting the power of this beam in order to reduce the gain of the amplifying medium to G/k, where k is a real number greater than 1. | 10-18-2012 |
20130044769 | MEMS Q-Switched Monoblock Laser - A monoblock laser cavity incorporates optical components required for a short-pulse laser. These optical components are ‘locked’ into alignment forming an optical laser cavity for flash lamp or diode laser pumping. Optical alignment is not necessary after the optical laser cavity is fabricated. An exemplary Q-switched monoblock laser replaces the Cr:YAG Q-switch functionality with a MEMS scanner. | 02-21-2013 |
20130083814 | LASER SYSTEM WITH NONLINEAR COMPRESSION - The invention relates to a laser system with a passively Q-switched laser | 04-04-2013 |
20130094525 | MEMS Q-Switched Er:Yb:Glass Laser - The compact Er:Yb:Glass Laser Cavity incorporates all optical components required for a short-pulse laser. These optical components are ‘locked’ into alignment forming an optical laser cavity for diode laser or flash lamp pumping. The optical laser cavity does not need optical alignment after it is fabricated. The improvement upon the original Er:Yb:Glass design replaces the Cobalt Spinel passive Q-switch component with a MEMS active Q-Switch component. | 04-18-2013 |
20130094526 | MEMS Q-Switched Nd:YLF Monoblock Laser - A monoblock laser cavity incorporates optical components for a short-pulse laser. These optical components are ‘locked’ into alignment forming an optical laser cavity for flash lamp or diode laser pumping. The optical laser cavity does not need further optical alignment upon fabrication. The improvements upon the original Monoblock design replaces the Cr:YAG Q-switch component with a MEMS scanner and replaces the Nd:YAG with Nd:YLF laser material. | 04-18-2013 |
20130230062 | END-PUMPED ALIGNMENT AND TEMPERATURE INSENSITIVE LASER TARGET DESIGNATOR AND MARKER - A compact, lightweight, laser target designator uses a TIR bounce geometry to place an end-pumped gain element functionally in the center of the resonator path, thereby allowing the resonator path to be terminated by a pair of crossed Porro prisms, so that the designator produces a high quality beam that is insensitive to alignment and temperature, and is low in manufacturing cost. Some embodiments fold the Porro legs of the resonator path back toward the gain element for compactness. Embodiments use a single gain element as both an oscillator gain element with TIR and as an output amplifier gain element without TIR. Various embodiments use block optical elements in a planar layout on a standard support medium such as aluminum to facilitate automated manufacturing. | 09-05-2013 |
20130279527 | Laser Marking of Polymer Materials - A system and method for efficiently laser marking a polymer target material, and more particularly a transparent polymer target material, is presented. The system includes a visually transparent polymer target material comprising a surface and a near 2 μm fiber laser, the fiber laser having a peak power equal to or greater than 10 kW, a pulse repetition rate equal to or greater than 1 kHz, and an average power equal to or less than 20 W. In certain embodiments, the fiber laser may be a Q-switched fiber laser having a pulse width equal to or less than 200 ns or a mode-locked fiber laser having a pulse width equal to or less than 100 ps. The method includes producing, using the fiber laser, a mark that is not transparent to visible wavelengths on the surface of the polymer target material without damaging it. | 10-24-2013 |
20130294465 | HIGHLY EFFICIENT 3rd HARMONIC GENERATION IN Nd: YAG LASER - The specification and drawings present an apparatus and a method for intra-cavity harmonic generation in lasers such as solid-state lasers using a multi-resonance cavity with meniscus lenses for focusing corresponding wavelength radiation components on non-linear optical elements such as non-linear optical crystals using type I or type II phase-matching for significantly increasing efficiency of the harmonic conversion and output powers of generated harmonics. Using only type I or only type II phase-matching for all non-linear crystals may eliminate the requirement of linear-polarization on the fundamental laser wavelength generation. For example, a highly efficient UV Nd:YAG laser at 355 nm (a third harmonic of the fundamental wavelength of 1064 nm for the Nd:YAG laser) using intra-cavity triple resonance cavity and meniscus lenses has been developed using embodiments described herein. | 11-07-2013 |
20140086268 | MICROCHIP LASER WITH SINGLE SOLID ETALON AND INTERFACIAL COATING - A microchip laser includes a microchip laser base comprising a gain region and a passive Q-switch region. The microchip laser also includes a solid etalon coupled to the microchip laser base, and an interfacial coating disposed between the microchip laser base and the solid etalon. In some embodiments, the microchip laser further includes a dichroic coating disposed on a surface of the microchip laser base opposite the interfacial coating. | 03-27-2014 |
20140133501 | PULSED ROTARY DISK LASER AND AMPLIFIER - There is provided a rotary disk laser module including disk comprised of at least one lasing material. The lasing material may be excited by a laser excitation source, such as an optical pump beam directed onto the disk. The laser gain region contains excited lasing material and extends between the first and second surfaces of the disk. A laser generator is formed when the gain region is brought into optical communication with a laser generator. A laser generator may be a laser oscillator or a laser amplifier. To create pulsed laser output, an optical modulator is positioned in the laser beam propagation path of the laser generator. | 05-15-2014 |
20140185634 | LASER APPARATUS AND CONTROL METHOD THEREFOR - The present invention uses a laser apparatus capable of selecting a wavelength of light to be outputted from a plurality of wavelengths, including: a branching unit which is formed of a polarizer and is configured to branch an optical path formed in a resonator including a reflecting unit having a plurality of fixed reflecting planes and an output mirror, into a plurality of optical paths, thereby forming a common optical path having an end defined by the output mirror and a plurality of optical path branches each having an end defined by any one of the reflecting planes; a laser medium disposed in the common optical path; and a selecting unit configured to select, from the plurality of optical path branches, an optical path branch which corresponds to a wavelength of light to be outputted. | 07-03-2014 |
20140241386 | SHORT-PULSED COMPACT MOPA - A master oscillator power amplifier (MOPA) system includes an oscillator having a neodymium-doped gadolinium vanadate gain-medium and delivering seed-pulses. A length of single mode fiber is used to broaden the spectrum of the seed pulse. An amplifier having a neodymium-doped yttrium vanadate gain-medium amplifies the spectrally broadened seed-pulses. The gain-spectrum of the amplifier partially overlaps the broadened pulse-spectrum, providing spectral selection of the seed-pulses in addition to amplification. This provides amplified output-pulses having a duration about one-third that of the corresponding seed-pulses. | 08-28-2014 |
20140321483 | COMPACT OPTICAL FREQUENCY COMB SYSTEMS - Compact optical frequency sources are described. The comb source may include an intra-cavity optical element having a multi-material integrated structure with an electrically controllable active region. The active region may comprise a thin film. By way of example, the thin film and an insulating dielectric material disposed between two electrodes can provide for rapid loss modulation. In some embodiments the thin film may comprise graphene. In various embodiments of a frequency comb laser, rapid modulation of the CEO frequency can be implemented via electric modulation of the transmission or reflection loss of an additional optical element, which can be the saturable absorber itself. In another embodiment, the thin film can also be used as a saturable absorber in order to facilitate passive modelocking. In some implementations the optical element may be formed on a cleaved or polished end of an optical fiber. | 10-30-2014 |
20150036703 | SINGLE MODE PROPAGATION IN FIBERS AND RODS WITH LARGE LEAKAGE CHANNELS - Various embodiments include large cores fibers that can propagate few modes or a single mode while introducing loss to higher order modes. Some of these fibers are holey fibers that comprise cladding features such as air-holes. Additional embodiments described herein include holey rods. The rods and fibers may be used in many optical systems including optical amplification systems, lasers, short pulse generators, Q-switched lasers, etc. and may be used for example for micromachining. | 02-05-2015 |
20150117475 | Q-SWITCHED LASER DEVICE - When an excitation light is entered in a laser medium including a doped (containing rare earth element) YAG, the vicinity of the excitation light entry face is locally heated which generates a birefringence, causing degradation of linear polarization of emitted laser. To avoid such a phenomenon, it was necessary to make the excitation light pulsed and slow down the repetition rate of the pulse. In this device, an undoped YAG is bonded to a excitation light entry face of the laser medium made of a doped YAG By arranging the YAG <100> axis so as to extend along the optical axis of the laser oscillation system, a linearly polarized pulse laser can be obtained. | 04-30-2015 |
20160056605 | SHARED MULTI-WAVELENGTH LASER RESONATOR WITH GAIN SELECTED OUTPUT COUPLING - The present invention provides improved laser beam quality with fewer parts than the current method demands and decreasing the transmit aperture, said apparatus comprising: two or more independently pumped gain modules, two or more pump diodes, a polarizing waveplate, non-linear optical crystals, and a passive Q-switch. | 02-25-2016 |
20160072250 | GENERATION OF A HIGH POWER PULSE-LASER USING FIELD GENERATED COHERENCE - A laser system including a laser cavity, a gain medium disposed in the laser cavity, a pump configured to excite an atom of the gain medium to an excited state, an optical device configured to couple a ground state of the atom of the gain medium to the excited state by applying an optical field to the gain medium, and a microwave device configured to couple the ground state of the atom of the gain medium to a different ground state by applying a microwave field to the gain medium. | 03-10-2016 |
20160141827 | Solid State Laser System - A laser system comprising an active medium ( | 05-19-2016 |