| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 372012000 | Electro-optic | 17 |
| 20080291949 | 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 wave laser and output coupling means to substantially output couple radiation having an output polarization state from the travelling wave laser. The system further includes polarization changing means incorporated into the optical path of the travelling wave laser for changing the polarization of radiation having the first polarization state to a seeding polarization state, wherein radiation with the seeding polarization state seeds the gain medium, and radiation intensity modulation means for modulating the intensity of radiation in the travelling wave laser to vary the feedback of radiation into the gain medium, wherein the radiation intensity modulation means also modulates the radiation with respect to the output coupling means. | 11-27-2008 |
| 20090059967 | Electro-Optic Bragg Deflector and Method of Using It as Laser Q-Switch in a Q-Switched Laser and a 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 of the present invention, the electro-optic Bragg deflector comprises an electrode-coated electro-optic material with a spatially modulated electro-optic coefficient. When a voltage is supplied to the electrodes, the electro-optic material behaves like a Bragg grating due to the electro-optically induced spatial modulation of the refractive index. The second embodiment of the present invention relates to an actively Q-switched laser, wherein the electro-optic Bragg deflector functions as a laser Q-switch. The third embodiment of the present invention combines the Q-switched laser and a laser-wavelength converter to form a Q-switched wavelength-conversion laser, wherein the EO Bragg deflector can be monolithically integrated with a quasi-phase-matching wavelength converter in a fabrication process. | 03-05-2009 |
| 20090190616 | 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-conjugate mirror and the end mirror. The outcoupling mirror and the end mirror form a start cavity. The outcoupling mirror and the phase-conjugate mirror form a main cavity. | 07-30-2009 |
| 20090232166 | ELECTRO-OPTIC DEFLECTOR - An electro-optic deflector | 09-17-2009 |
| 20100002732 | Pumped Laser System Using Feedback to Pump Means - A laser system according to the invention comprises pump generating means (x | 01-07-2010 |
| 20100080251 | LASER AND METHOD FOR GENERATING PULSED LASER RADIATION - A laser for generating pulsed laser radiation is provided, having a resonator, a laser-active medium, which is situated in the resonator, a Q-switch, which is situated in the resonator, and which can be put into a first state and a second state to set the resonator quality. The resonator quality is lower in the first state than in the second state. The laser also may have a detection unit, which, when the Q-switch is in the second state, measures the intensity of the building laser pulse and outputs it as an intensity signal. The laser may further have a control unit for controlling the Q-switch, which, as a function of a predetermined pulse duration and the applied intensity signal, switches the Q-switch from the second state into the first state, before the pulse buildup of the laser pulse is completed. | 04-01-2010 |
| 20100195680 | 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 photomechanical treatment of skin pigmentations and pigmented lesions, both naturally-occurring (e.g., birthmarks), as well as artificial (e.g., tattoos). The laser energy may be generated with an apparatus having a resonator with the capability of switching between a modelocked pulse operating mode and an amplification operating mode. The operating modes are carried out through the application of a time-dependent bias voltage, having waveforms as described herein, to an electro-optical device (e.g., a Pockels cell) positioned along the optical axis of the resonator. | 08-05-2010 |
| 20100296531 | 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 photomechanical treatment of skin pigmentations and pigmented lesions, both naturally-occurring (e.g., birthmarks), as well as artificial (e.g., tattoos). The laser energy may be generated with an apparatus having a resonator with the capability of switching between a modelocked pulse operating mode and an amplification operating mode. The operating modes are carried out through the application of a time-dependent bias voltage, having waveforms as described herein, to an electro-optical device positioned along the optical axis of the resonator. | 11-25-2010 |
| 20110075688 | 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-coated electro-optic material with one of a 1D and a 2D spatially modulated electro-optic coefficient. When a voltage is supplied to the electrodes, the electro-optic material behaves like a Bragg grating due to the electro-optically induced spatial modulation of the refractive index. The second embodiment relates to an actively Q-switched laser, wherein the electro-optic Bragg deflector functions as a laser Q-switch. The third embodiment of the present invention combines the Q-switched laser and a laser-wavelength converter to form a Q-switched wavelength-conversion laser, wherein the EO Bragg deflector can be monolithically integrated with a quasi-phase-matching wavelength converter in a fabrication process. | 03-31-2011 |
| 20110110386 | 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 the optical entrance and exit surface of a Q-switch crystal, e.g., lithium niobate (LiNbO | 05-12-2011 |
| 20110122896 | HIGH-POWER DIODE END-PUMPED SOLID-STATE UV LASER - A high-power diode end-pumped solid-state UV laser comprises high-power fiber-coupled end pumping laser diodes, a specially designed fundamental laser cavity and multiple high-power high-efficiency harmonic generations. Nonuniform fundamental laser cavity has to be used, i.e. the beam size of the fundamental laser cannot be uniform in the fundamental cavity. Thermal transfer inside the laser crystal and harmonic crystal has to be specially and carefully treated, and special crystal mounts were designed to optimize the thermal contact and maximize the heat transfer. In addition, harmonic crystal mounts were specially designed to minimize the loss and protect the hydroscopic crystals. | 05-26-2011 |
| 20120044960 | UV ILLUMINATION FOR MITIGATION OF COLD TEMPERATURE PYROELECTRIC EFFECTS IN LITHIUM NIOBATE - An actively Q-switched laser based on UV illumination mitigates pyroelectric effects in lithium niobate. An exemplary embodiment comprises a pump source; a dichroic mirror having one end optically facing said pump source; a gain medium optically facing another end of said dichroic mirror; a polarizer having one end optically facing another end of said gain medium; a quarter wave plate having one end optically facing another end of said polarizer; and a electro-optic crystal having one end optically facing said quarter wave plate, at least one side of said electro-optic crystal being electrically connected to Q-switch driver to have the crystal function as a Q-switch. A UV illumination source illuminates a side surface of said electrical-optic crystal with UV light. An output mirror receives an output from said Q-switch and produces a laser emission. | 02-23-2012 |
| 20120189024 | Q-SWITCHED GRATING VERTICAL-CAVITY SURFACE-EMITTING LASER SYSTEM AND METHOD FOR FABRICATING THE SAME - A vertical cavity surface emitting laser (VCSEL) system and method of fabrication are included. The VCSEL system includes a gain region to amplify an optical signal in response to a data signal and a first mirror arranged as a partially-reflective high-contrast grating (HCG) mirror at an optical output of the VCSEL system. The VCSEL system also includes a second mirror. The first and second mirrors can be arranged as a laser cavity to resonate the optical signal. The VCSEL system further includes a doped semiconductor region to generate a current through the first mirror in response to a voltage signal to substantially alter the reflectivity of the first mirror to provide Q-switching capability of the VCSEL system. | 07-26-2012 |
| 20130195128 | Multiple Wavelength Laser System - A system for generating multiple simultaneous laser wavelengths, said system comprising: a pulsed slave laser comprising a non-linear electro-optic crystal optically coupled to a lasing crystal in a ring cavity configuration, said non-linear electro-optic crystal configured to adjust an optical path length of said ring cavity in response to an applied voltage potential; an energy pump configured to initiate a pulse cycle in said pulsed slave laser in response to a trigger; a cavity control circuit configured to apply said voltage potential to said non-linear electro-optic crystal to generate a cavity resonance condition associated with said adjusted optical path length, said cavity control circuit further configured to provide said trigger to said energy pump in response to a detection of said cavity resonance condition; and one or more seed lasers configured to inject a single frequency laser beam into said pulsed slave laser. | 08-01-2013 |
| 20130230063 | METHODS OF MODULATING MICROLASERS AT ULTRALOW POWER LEVELS, AND SYSTEMS THEREOF - A microlaser system includes an optical source, a microlaser, an actuator switch, and a photovoltaic power source. The microlaser, which includes a control element, is optically pumped by at least a portion of light emitted by the optical source. The actuator switch is configured to be activated by a triggering event. Furthermore, the photovoltaic power source is coupled in a series connection with the actuator switch and the control element, the series connection configured to connect the photovoltaic power source to the control element of the microlaser when the actuator switch is activated by the triggering event. | 09-05-2013 |
| 20140376574 | Method for Operating a Laser System - In a method for operating a laser system in a Q-switched mode, the laser system provided with a laser resonator with a laser medium and an electro-optical modulator, wherein the electro-optical modulator has an EOM crystal, wherein the EOM crystal has a characteristic ringing time (t | 12-25-2014 |
| 20150117477 | LASER APPARATUS AND METHOD FOR GENERATING OPTICAL PULSES BASED ON Q-SWITCHING MODULATED WITH A 2-D SPATIAL LIGHT MODULATOR - A laser apparatus and method are provided for generating optical pulses based on Q-switching controllable with a fast and reliable two-dimensional (2-D) spatial light modulator, such as a digital micro-mirror device (DMD). Temporal and spatial modulation may be applied to selectively control the Q-switching provided by the spatial light modulator. The apparatus and method may be optionally optimized with straightforward optical components to increase angular magnification of a beam incident on the spatial light modulator and thus effectively reduce the Q-switching time. | 04-30-2015 |
