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| Number | Title | Issue Date |
| 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 embodiment, the electro-optic Bragg deflector comprises an electrode... | 05/22/2012 |
| 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 device. A controllable modulator is positioned between the phase-conju... | 05/08/2012 |
| 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 optically coupled with the fiber grating, in which a rare-earth elem... | 03/20/2012 |
| 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 projection orthogonal to the pump beam. The concept can be implemented... | 10/04/2011 |
| 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 excitation energy is placed on a resonance path; an excitation devic... | 01/25/2011 |
| 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 operates in a UV range of about 150 to 400 nm. A transducer is b... | 12/28/2010 |
| 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 present invention, a monoblock laser includes a gain block to generate ... | 11/23/2010 |
| 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 using fibers with anomalous dispersion and high non-linear threshold... | 10/12/2010 |
| 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 highly desirable for laser prostatectomy. Giant first pulse may occur... | 08/03/2010 |
| 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 effected by a Pockels cell optical switch. During a dumping period a ... | 07/20/2010 |
| 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 polarized radiation having a first polarization state into the travelling wav... | 07/13/2010 |
| 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 attenuates and transmits first wavelength light. An HR/HT mirror pas... | 06/01/2010 |
| 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 the RF transducer discontinues propagation of the acoustic wave and ca... | 05/25/2010 |
| 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 losses and low optical loses with controllable spatial refractive inde... | 02/23/2010 |
| 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 arranged on the optical axi... | 02/16/2010 |
| 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 that information for adjusting dummy pulse time periods to compensate f... | 11/10/2009 |
| 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 to the gain medium, thereby setting the Q-switch in a continuous oscil... | 10/06/2009 |
| 7564879 | Laser system In the case where, e.g., because of provision of a high-gain and high-energy Q-switched laser oscillator in a laser system in a MOPA configuration, the duration τz from the time point when oscillation-stage Q switches (13a and 13b) start... | 07/21/2009 |
| 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), enclosed in a resonator, a Q-switch (4), for ... | 03/03/2009 |
| 7471704 | 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 to the gain medium, thereby setting the Q-switch in a continuous oscil... | 12/30/2008 |
| 7466727 | Passive Q-switch laser A passive Q-switch for a laser system, and a method for its production. The laser is operative at near infrared wavelength region, including the eye-safe region. The Q-switch includes a saturable absorber based on IV-VI semiconductor nanocrystals (NCs), embedded in ... | 12/16/2008 |
| 7460566 | Laser power reduction without mode change A laser system comprises a source, a laser medium, first and second mirrors, a Q-switch, and a control system. The source produces input energy. The laser medium converts the input energy to an output beam. The first and second mirrors are disposed on opposing sides... | 12/02/2008 |
| 7433373 | Actively Q-switched laser system using quasi-phase-matched electro-optic Q-switch A Q-switched laser system is disclosed. The laser system employs a quasi-phase-matched electro-optic (QPM EO) crystal as the laser Q-switch. When applied with a certain modulating electric field, the QPM EO crystal can function as a polarization rotator to rotate th... | 10/07/2008 |
| 7430231 | Vertical cavity surface emitting laser (VCSEL) arrays pumped solid-state lasers Solid-state lasers pumped by incoherent or partially coherent, monochromatic light sources such as high power VCSEL arrays. Efficient and uniform injection of pumping energy into gain medium is achieved through spectral match of the pump source with the gain medium ... | 09/30/2008 |
| 7428252 | 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 positiv... | 09/23/2008 |
| 7421166 | Laser spark distribution and ignition system A laser spark distribution and ignition system that reduces the high power optical requirements for use in a laser ignition and distribution system allowing for the use of optical fibers for delivering the low peak energy pumping pulses to a laser amplifier or laser... | 09/02/2008 |
| 7420995 | Simultaneously mode-locked, Q-switched laser A simultaneously mode-locked, Q-switched laser is configured to prevent loss of mode lock during laser operation. A preferred embodiment prevents loss of mode lock by operating the laser between the Q-switched pulses with a residual level of laser power sufficient t... | 09/02/2008 |
| 7391794 | Injection seeding of frequency-converted Q-switched laser A non-linearly frequency-converted Q-switched laser is “injection seeded” with short pulses from another laser, called a seed laser. Radiation produced by the Q-switched laser is frequency converted in a non-linear process. The injection seeding can enhance peak... | 06/24/2008 |
| 7388889 | Method and device for producing subsurface markings in a transparent material body A method and device for producing subsurface markings in a transparent material body by focusing a pulsed laser beam in the interior of the material body so that the laser beam exceeds the destruction threshold of the material body to produce a permanent marking. In... | 06/17/2008 |
| 7372878 | Method and system for preventing excessive energy build-up in a laser cavity A method and system decrease the amount of undesired laser radiation reaching a workpiece from a laser having a laser cavity and a Q-switch. The laser operates at any given time in one of at least two modes. In a first mode the laser emits pulses at a PRF (pulse rep... | 05/13/2008 |
| 7372608 | Light control device and light control system using the same A light control device includes a substrate, a first reflective layer, a light modulating film in which the refractive index varies according to an applied electric field, a transparent electrode, and a second reflective layer having a reflection characteristic such... | 05/13/2008 |
| 7372880 | Optical pulse lasers The present invention provides pulsed lasers which employ carbon nanotubes, particularly layers of carbon nanotubes, as saturable absorbers, mode lockers or for Q-switching elements. The present invention also provides methods and materials for mode-locking and Q-sw... | 05/13/2008 |
| 7358159 | Method for manufacturing ZnTe compound semiconductor single crystal ZnTe compound semiconductor single crystal, and semiconductor device The present invention relates to a method for producing an n-type ZnTe system compound semiconductor single crystal having high carrier concentration and low resistivity, the ZnTe system compound semiconductor single crystal, and a semiconductor device produced by u... | 04/15/2008 |
| 7356053 | Mode-locked laser with variable pulse duration A pulsed, mode-locked, picosecond laser having a solid-state laser medium, a saturable absorber (SA), and a passive negative feedback (PNF) element. The SA is “slow,” having an absorption recovery time which is longer than a desired duration of an output pulse. ... | 04/08/2008 |
| 7352784 | Laser burst boosting method and apparatus Methods and apparatus for managing thermal loads on a laser gain medium and for boosting the output power of a diode pumped laser are disclosed. The short-term average pumping power to the gain medium is increased, to provide a burst of pumping energy to the laser g... | 04/01/2008 |
| 7346092 | Diode side pumped high pulse energy Nd:YLF lasers According to the invention, a diode side pumped laser is provided. The laser has an optical cavity formed between a first and a second reflective surface. A Nd:YLF lasing medium is located within the cavity along its optical axis. The Nd:YLF lasing medium can desira... | 03/18/2008 |
| 7324568 | Modulated saturable absorber controlled laser A modulated saturable absorber controlled laser. The laser includes an active medium; a saturable absorber material operationally coupled to the medium to serve as a passive Q switch; and an energy source disposed external to the medium for apply energy to the absor... | 01/29/2008 |
| 7319708 | Variable pulse repetition frequency passively Q-switched laser A passive Q-switch element is disclosed that permits operating a laser with a variable pulse repetition frequency (PRF). The Q-switch comprises two wedges of material, one made from saturable absorber material, the other from transparent material, with the two wedge... | 01/15/2008 |
| 7312452 | Mobile remote detection device and remote detection method for methane gas accumulations The invention relates to a mobile remote detection device for accumulations of methane, comprising an emitter device having a light source in order to generate light, the wavelength of said light source being tuned with the spectral signature of methane, whereby the... | 12/25/2007 |
| 7313155 | 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 highly desirable for laser prostatectomy. Giant first pulse may occur... | 12/25/2007 |
