Class 372/13 - Acousto-optic

Subclass of Class 372 - Coherent light generators
Definition: Subject matter wherein the beam control device includes
No. of patents: 148
Last issue date: 11/22/2011

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Number	Title	Issue Date
8064489	Spectral spreading and control device for high peak power pulse lasers The present invention relates to a spectral stretching and control device for high peak power pulse lasers, which does not limit the extraction efficiency of the amplifiers in the CPA chain into which said device can be inserted, and it is characterized in that it c...	11/22/2011
7903699	Acousto-optically Q-switched COlaser 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 germanium. ...	03/08/2011
7630416	High-repetition-rate femtosecond regenerative amplification system Provided is a high-repetition-rate femtosecond regenerative amplification system. The regenerative amplification system includes: a laser oscillator emitting pulses; a stretcher stretching the pulses with negative dispersion; a regenerative amplifier amplifying the ...	12/08/2009
7558300	Injection seeded, q-switched fiber ring laser A narrow linewidth, injection seeded, Q-switched Er fiber ring oscillator, that provides over 600 μW of average output power at 500 Hz, with 1.2 μJ per pulse, before the output appears to be significantly affected by stimulated Brillouin scattering. This laser con...	07/07/2009
7486704	Method and device for controlling the amplitude of the wavelength spectrum of ultra-short light pulses emitted by multiple passage laser amplifiers The invention relates to a method and device for controlling the amplitude of the wavelength spectrum of ultra-short light pulses emitted by multipass laser amplifiers. According to the invention, a programmable acousto-optic device (8) is introduced into a l...	02/03/2009
7409122	End face structure of optical fiber, optical fiber laser, and laser processing apparatus An end face structure of an optical fiber includes a coreless fiber fused to an emitting end face of the fiber optical fiber and a coating material disposed around at least the coreless fiber, a refractive index of the coating material being higher than a refractive...	08/05/2008
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
7376354	All optical clock recovery All optical clock recovery includes a transmitter for generating an optical timing signal. The transmitter includes a semiconductor laser for the production of a dynamically synchronizable timing signal, the laser having an external resonator for feedback of the tim...	05/20/2008
7372612	High performance compact external cavity laser (ECL) for telecomm applications An optical tunable laser design (100) for the optic telecommunication industry is disclosed in this invention. This new design is economical, reliable, robust and with superior optical performances. The design offers broadband tunability, high output power, n...	05/13/2008
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
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
7301981	Methods for synchronized pulse shape tailoring A plurality of subresonators (12, 14), having different design configurations, share a common resonator section (18) such that the lasing action can be substantially synchronized to provide coherent laser pulses that merge the different respective puls...	11/27/2007
7289549	Lasers for synchronized pulse shape tailoring A plurality of subresonators (12, 14), having different design configurations, share a common resonator section (18) such that the lasing action can be substantially synchronized to provide coherent laser pulses that merge the different respective puls...	10/30/2007
7268316	Method for cleaning a resonator A method for cleaning a resonator in an oscillator, a laser being first used for the adjustment of the resonator, in that, using the laser, a dielectric material of the resonator is removed until a specified frequency is attained; the resonator being cleaned using t...	09/11/2007
7254147	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...	08/07/2007
7218443	Generation of tunable light pulses A device for generating tunable light pulses has a non-linear optical fiber. The optical spectrum of femtosecond light pulses can be modified by this optical fiber, taking advantage of solitonic effects. In order to make available such a device, which makes it possi...	05/15/2007
7154928	Laser output beam wavefront splitter for bandwidth spectrum control Apparatus/method providing bandwidth control in narrow band short pulse duration gas discharge laser output light pulse beam producing systems, producing a beam comprising pulses at selected pulse repetition races, e.g., comprising a dispersive bandwidth selection o...	12/26/2006
7139294	Multi-output harmonic laser and methods employing same A solid-state laser (10) has a laser resonator (20) with output ports (22) at both ends to provide two separate laser micromachining beams (42). A set of wavelength converters (26) can be employed to convert the laser machining bea...	11/21/2006
7130318	Electrooptic Q-switch element made of crystal This invention is a kind of electrooptic Q-switch element made of a single crystal and belongs to the application of crystal in electrooptic technology field. The invention consists of electrooptic Q-switch which is made of La3Ga5SiO14	10/31/2006
7120174	Pulsed laser apparatus and method A laser apparatus for generating optical pulses is disclosed, said laser apparatus has a reflecting gain element preferably including a fiber gain medium. The reflecting gain element is coupled to a controllable reflecting/transmitting module having a reflecting sta...	10/10/2006
7116688	Laser system and method for generation of a pulse sequence with controllable parameters and computer program product A laser system for generating at least one pulse and/or pulse sequence(s) of pulses having at least one specified property, such as pulse energy, duration, peak intensity, pulse form and/or timing includes an amplifying cavity. The amplification process is monitored...	10/03/2006
7103282	All optical clock recovery All optical clock recovery includes a transmitter for generating an optical timing signal. The transmitter includes a semiconductor laser for the production of a dynamically synchronizable timing signal, the laser having an external resonator for feedback of the tim...	09/05/2006
7092632	Optical communication apparatus, optical communication information decoding method, optical switching system, and driving method for optical switching system An optical switching system is disclosed which can achieve high speed optical switching with a simple configuration. Light from a light irradiation section is irradiated into an optical transmission line made of a material having a nonlinear optical effect and dispo...	08/15/2006
7088758	Relax gas discharge laser lithography light source An apparatus and method are disclosed for operating a narrow band short pulse duration gas discharge laser output light pulse beam producing system, producing a beam comprising laser output light pulses at a selected pulse repetition rate, which may comprise: a disp...	08/08/2006
7027477	Expansion matched thin disk laser and method for cooling An optical system includes a diode pump source and a thin disk gain media. The thin disk gain media has first and second surfaces and is made of a material with an anisotropic thermal expansion. At least one of the first and second surfaces is a cooling surface. The...	04/11/2006
7003011	Thin disk laser with large numerical aperture pumping An optical system has a high power diode pump source and a thin disk gain media. An optical coupler is positioned between the diode pump source and the thin disk gain media. The optical coupler produces a beam with a large numerical aperture incident on the thin dis...	02/21/2006
7003003	Method and apparatus for providing multiple independently controllable beams from a single laser output beam A laser output beam is directed into an acousto-optic cell. The acousto-optic cell is driven by RF voltages at a plurality of different frequencies. Portions of the laser output beam are diffracted by the acousto-optic cell at a plurality of different angles corresp...	02/21/2006
6973104	Pulse control in laser systems A pulsed laser system includes a laser pump, a laser rod, a reflector interposed between the laser pump and the laser rod, through which energy from the laser pump enters the laser rod, an output reflector through which energy is emitted from the laser rod, a switch...	12/06/2005
6970484	Laser tuning by spectrally dependent spatial filtering A tunable laser and laser tuning method, based on the interaction of a spectrally dependent beam distortion and a spatial filter within a laser cavity. One embodiment of this laser is an external cavity semiconductor laser in which broad tunability is obtained by th...	11/29/2005
6961355	Variable power pulsed secondary beam laser Lasers are provided to deliver a wide variety of wavelengths at variable pulse energy. A laser cavity is formed between a first and second reflective surface. A lasing medium is located within cavity which lases at a preselected fundamental frequency. One or more no...	11/01/2005
6931035	Q-switching method for pulse train generation A method of operating a continuously pumped, Q-switched laser to provide trains of pulses for laser operations is disclosed. The laser includes a solid-state gain-medium that exhibits a thermal-lensing effect on being optically pumped. Pulse delivery is controlled b...	08/16/2005
6930819	Miniaturized external cavity laser (ECL) implemented with acoustic optical tunable filter An optical tunable laser design for the optical telecommunication industry is disclosed in this invention. This new design is economical, reliable, robust and with superior optical performances. The design offers broadband tunability, high output power, narrow laser...	08/16/2005
6922419	Long pulse vanadate laser A diode-pumped solid-state laser has been invented that provides long Q-switched pulses at high repetition rate with high stability. The laser incorporates Nd:YVO4 as the gain medium. ...	07/26/2005
6920082	Method and apparatus for determining earth formation shear-wave transverse isotropy from borehole stoneley-wave measurements The present invention is a method of determining formation horizontal shear wave velocity, formation transverse isotropy and an effective logging tool modulus. The method comprises determining an effective logging tool modulus by modeling the logging tool as a fluid...	07/19/2005
6901087	Broadband laser source A broadband laser source comprising: a resonant cavity (1) containing a medium (2) which emits optical energy (3) in a continuum of wavelengths in response to application of pump energy (4) to the medium (2); a source of pump energ...	05/31/2005
6898217	Ultrasonic tunable laser A tunable laser device produces a laser energy over a range of frequencies. A property of an ultrasonic transducer or, more specifically, the frequency of an ultrasonic wave created by the ultrasonic transducer is altered to change the laser frequency of the tunable...	05/24/2005
6882374	Image projection system A DMD (4) as a image display device time divisionally displays channel images formed by separating an image into RGB channels. A white light emitted from a xenon lamp (1) is separated, by an acousto-optical element (3), into spectal components. ...	04/19/2005
6859467	Electro-optic modulator material An electro-optic device for use with a laser beam. A crystal has a first face and a second face. Means are provided for applying a voltage across the crystal to obtain a net phase retardation on the polarization of the laser beam when the laser beam is passed throug...	02/22/2005
6831936	Pulse control in laser systems A pulsed laser system includes a laser pump, a laser rod, a reflector interposed between the laser pump and the laser rod, through which energy from the laser pump enters the laser rod, an output reflector through which energy is emitted from the laser rod, a switch...	12/14/2004
6810048	Virtual coherent signal controlled oscillator A virtual coherent signal controlled laser oscillator for use in optical phase locked coherent receivers. The present invention employs a fixed laser oscillator in combination with a signal controlled microwave oscillator. A single sideband mixer processes the signa...	10/26/2004

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Class 372/13 - Acousto-optic