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Coherent light generators

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Class / Patent application numberDescriptionNumber of patent applications / Date published
372039000 PARTICULAR ACTIVE MEDIA 1293
372009000 PARTICULAR BEAM CONTROL DEVICE 1014
372006000 OPTICAL FIBER LASER 266
372380100 PARTICULAR COMPONENT CIRCUITRY 208
372034000 PARTICULAR TEMPERATURE CONTROL 200
372092000 PARTICULAR RESONANT CAVITY 119
372069000 PARTICULAR PUMPING MEANS 72
372003000 RAMAN LASER 27
372005000 SHORT WAVELENGTH LASER 25
372033000 PARTICULAR OPERATING COMPENSATION MEANS 13
372004000 LONG WAVELENGTH (E.G., FAR INFRARED) 13
372002000 FREE ELECTRON LASER 3
20130083811HIGH-EFFICIENCY METHOD AND DEVICE, TO PRODUCE COHERENT SMITH-PURCELL RADIATION - High-efficiency method and device, to produce coherent Smith-Purcell radiation. A conductive diffraction grating, delimited by two conductive walls, is used, and an electron beam is passed above the grating to generate the radiation. According to the invention, the speed of the electrons is sufficiently low in order that, in a diagram (wave number k, frequency f), the beam line (I) intersects a portion (V) of a branch of the dispersion relationship, located in the first Brillouin zone, and corresponding to the grating's fundamental mode, at a point (P) located outside the zone delimited by the light lines (III, IV), and the current density of the beam is sufficiently high to excite the grating's fundamental mode which is radiated towards the outside thereof.04-04-2013
20120106577METHOD FOR GENERATING FREE ELECTRONS AND FREE-ELECTRON LASER SYSTEM USING THE INTERACTION WITH A LASER UNDULATOR - The disclosure relates to a free-electron laser system and a method for generating a packet of relativistic electrons capable of propagating in a first propagation direction (Oz), and a device for generating an undulator beam capable of interacting with the packet of relativistic electrons. In the system, the undulator beam results from combining, at an interaction area through which the propagation direction (Oz) of the packet passes, at least two laser beams propagating in different directions and each of which has at least one non-zero component in a plane orthogonal to the propagation direction (Oz) of the packet. The disclosure also relates to a method for generating a free-electron laser beam involving trapping and guiding a packet of relativistic electrons injected into an interaction area and implementing such a free-electron laser system.05-03-2012
20090290604Micro free electron laser (FEL) - A charged particle beam including charged particles (e.g., electrons) is generated from a charged particle source (e.g., a cathode or scanning electron beam). As the beam is projected, it passes between plural alternating electric fields. The attraction of the charged particles to their oppositely charged fields accelerates the charged particles, thereby increasing their velocities in the corresponding (positive or negative) direction. The charged particles therefore follow an oscillating trajectory. When the electric fields are selected to produce oscillating trajectories having the same (or nearly the same) frequency as the emitted radiation, the resulting photons can be made to constructively interfere with each other to produce a coherent radiation source.11-26-2009
372007000 THIN FILM LASER 3
20080273556SEMICONDUCTOR LIGHT-EMITTING DEVICE - A semiconductor light-emitting device includes a light generation unit generating light with an oscillation wavelength λ, a light outgoing facet from which light generated at the light generation unit emerges, a light reflecting facet at which light generated at the light generation unit is reflected, and a high reflection film at the light reflecting facet and made of a dielectric multilayered film of at least three layers. The high reflection film includes a first layer which is in contact with the light reflection facet, is constituted of Al11-06-2008
20090161702Optically pumped disk-type solid state laser oscillator and optically pumped disk-type solid state laser system - An optically pumped disk type solid state laser oscillator includes: a cylindrical shape thin film laser gain medium having a through-hole; a ring mirror whose surface is opposing to a side surface of the thin film laser gain medium; a conical mirror arranged in the through-hole and reflects a light from the ring mirror to a direction perpendicular to the thin film laser gain medium where an output mirror is arranged. The ring mirror, the conical mirror and the output mirror compose a resonator for oscillating a laser beam to be outputted from the output mirror.06-25-2009
20110134941TWO DIMENSIONAL PHOTONIC CRYSTAL SURFACE EMITTING LASER - Provided is a two dimensional photonic crystal surface emitting laser which can suppress light leaking outside in an in-plane direction of the two dimensional photonic crystal and an absorption loss in an active layer caused by serving as an absorbing layer without contributing to light emission, and can improve light use efficiency. The surface emitting laser has a laminated structure in which an active layer and a photonic crystal layer are laminated in a vertical direction, has a resonance mode in an in-plane direction of the photonic crystal, and extracts light in a vertical direction to a surface of the photonic crystal, wherein the laminated structure has a multi-refractive index layer including a central region made of a high refractive index medium and a peripheral portion made of a low refractive index medium with a lower refractive index than that of the high refractive index medium.06-09-2011
372037000 HAVING AN APPLIED MAGNETIC FIELD 2
20090052484Magneto-optoelectronic switch and sensor - A Magneto-Optoelectronic Device MOD (02-26-2009
20090067461ROTATING LASER TRANSMITTER - The transmitter has a generally flat, circuit board stator, a rotor including a plurality of magnets mounted in a ring around a central opening, and a bearing, supporting the rotor for rotation about an axis that extends through the central opening, A pentaprism assembly including an optics holder is mounted on the rotor for rotation therewith. The pentaprism assembly receives a beam of laser light through the central opening and redirects at least a portion of the laser light outward in a direction normal to the rotation axis. A laser source, mounted on the stator, provides a beam of laser light through the central opening to the pentaprism assembly. The beam of laser light is aligned with the rotation axis. The laser source includes a collimating lens positioned within the rotor. A shield plate of magnetic material beneath the stator exerts a force on the rotor in conjunction with the magnets, taking play out of the bearing. The transmitter uses Hall effect sensors on the stator to control switching current to coils on the stator. The transmitter also uses the outputs of the Hall effect sensors and a timer output to control dithering of the laser beam.03-12-2009
372109000 MISCELLANEOUS 1
20090067469Optical module having a block with feedthrough pins - The present invention provides an optical module with a relatively wider mounting area for the devices with a CAN package. The optical module of the present invention provides the stem and the cap, both of which form a cavity where the devices are to be installed. The stem provides the block extruding from the primary surface of the stem into the cavity. The block mounts the optical and electrical devices in surfaces opposite to each other, and provides feedthrough pins between these two surfaces. The device mounted in each surface may be electrically connected through these feedthrough pins.03-12-2009
372008000 LASER LOGIC SYSTEM 1
20080291946Fast quantum gates with ultrafast chirped pulses - Apparatus and methods of performing fast single-qubit quantum gates using ultrafast femtosecond frequency chirped laser pulses are disclosed. The use of chirped pulses removes the demanding restrictions of prior art approaches and allows for the construction of fast quantum gates that operate at speeds on the of order several picoseconds. The apparatus includes two synchronized lasers (pump and Stokes) used to manipulate a qubit wave function in a select manner. Each laser system generates a train of optical pulses. Pulse pickers choose pump and Stokes pulses, which propagate though respective pulse shapers that apply necessary time-dependent phases. To achieve complete overlap between the pulses in time domain, necessary adjustments can be made by using an additional time delay line, which can be located in any path or in both paths.11-27-2008

Patent applications in class Coherent light generators

Patent applications in all subclasses Coherent light generators