Class / Patent application number | Description | Number of patent applications / Date published |
372027000 | Polarization | 33 |
20080225909 | LASER LIGHT SOURCE DEVICE, OPTICAL INFORMATION RECORDING DEVICE, AND OPTICAL INFORMATION REPRODUCING DEVICE - The hologram recording technology expected to realize ultrahigh-density information recording is one of the post Blu-ray Disc technology. When we think about developing a drive based on this technology and suitable for consumer electronics, it is considered most desirable from the viewpoint of upward compatibility to solve the problem of the BD-compatibility. The problem in sharing the laser light source between the hologram recording device and the current optical disc device, however, is that the hologram recording requires a high-coherent, single-mode light beam, while the current optical discs requires a low-coherent, multi-mode light beam. In point of the coherence of the light source, the above two cases require the light beams of the characteristics opposite to each other, and this presents an important task. | 09-18-2008 |
20080259976 | Organic Columnar Thin Films - A thin film includes a substrate and a transparent, porous film of organic material, such as 8-hydroxyquinoline aluminum. The organic material is vapor deposited on the substrate such that the film has distinct helical columns extending away from the substrate. | 10-23-2008 |
20080267232 | Micro-Structured Optic Apparatus - A micro-structured optics apparatus includes a concave microlens to expand a beam of light, a reflector to provide a first reflection of at least a portion of the beam of light and a micro-Fresnel lens to collimate the at least a portion of the beam of light after the expansion. | 10-30-2008 |
20090080479 | METHOD AND SYSTEM FOR OPERATING AN ATOMIC CLOCK USING A SELF-MODULATED LASER WITH ELECTRICAL MODULATION - A polarization gain medium such as an emitting laser diode provides the optical pumping. An atomic vapor cell is positioned in the laser cavity providing spontaneous push-pull optical pumping inside the laser cavity. This causes the laser beam to be modulated at hyperfine-resonance frequency. A clock signal is obtained from electrical modulation across the laser diode. | 03-26-2009 |
20090161706 | OPTICAL LEVEL CONTROL DEVICE, METHOD FOR CONTROLLING SAME, AND LASER APPLICATION DEVICE - The optical level control device independently controls the intensities of two beams having different wavelengths that are emitted from a laser oscillator, and the optical level control device comprises a wavelength-dependent wavelength plate and a polarization beam splitter. The wavelength-dependent wavelength plate functions as a half-wave plate with respect to the first light wave and as a full-wave plate with respect to the second light wave. Only the rotation angle of the polarization beam splitter about the optical axis is adjusted to set the intensity of the second light wave transmitted rectilinearly through the polarization beam splitter. The polarization beam splitter is then fixed at the adjusted angle, and the rotation angle of the wavelength plate about the optical axis is adjusted to set the intensity of the first light wave. | 06-25-2009 |
20090168818 | Systems and methods for polarization modulation of an optical signal - According to one embodiment of the present invention, a method of operating a laser source is provided. The laser source comprises a laser configured to generate an optical signal, and a polarization split and delay unit that is coupled to the optical signal. The polarization split and delay unit is configured to split the optical signal into a first and second orthogonally polarized component, create an optical path difference ΔL between the first and second orthogonally polarized components and combine the first and second orthogonally polarized components into a combined signal. The method comprises modulating the optical signal by applying a wavelength modulation signal to the laser such that the modulated optical signal comprises at least a first wavelength λ | 07-02-2009 |
20090219960 | PHASE AND POLARIZATION CONTROLLED BEAM COMBINING DEVICES AND METHODS - A controller, such as a programmable logic controller, may manipulate a phase and/or polarization module to alter and/or control the phase and polarization of input beams. Utilizing active phase and polarization control can enable the combination of any arbitrary number of input beams into a single, combined beam. Utilizing active phase and polarization control can also enable the combination of input beams having arbitrary power levels. | 09-03-2009 |
20090238223 | Laser Irradiation Apparatus - A laser irradiation apparatus is provided in which the occurrence of adverse effects on an object to be irradiated with a laser beam due to the difference in the polarization state between pulsed laser beams can be prevented or significantly reduced when the pulsed laser beams emitted from two laser light sources are guided to pass through the same optical path for irradiation of an object to be irradiated with the pulsed laser beams. The laser irradiation apparatus is provided with a first laser light source | 09-24-2009 |
20090245303 | LASER LIGHT SOURCE DEVICE - A laser light source device is disclosed, which reduces the coherence of the laser light and inexpensively achieves a visually recognizable level of speckle reduction without use of a mechanical driving means. The laser light source device includes: laser modules, each including a laser light source, an intensity modulation unit to apply intensity modulation to laser light emitted from the laser light source, and a first waveguide to receive the intensity-modulated laser light from the laser light source and output the laser light from an output end thereof; and a second waveguide including an input end optically connected to a light outputting area of the first waveguides to receive the laser light outputted from the first waveguides, the first waveguides being closely bundled in the vicinity of output ends thereof, wherein a core of the second waveguide at the input end is larger than the light outputting area. | 10-01-2009 |
20100128747 | POLARIZATION PURITY CONTROL DEVICE AND GAS LASER APPARATUS PROVIDED WITH THE SAME - A degree of polarization control device includes:
| 05-27-2010 |
20110122902 | LASER OSCILLATOR AND FILTERING METHOD - Provided is a fiber laser including a mode filter for selectively attenuating, among modes included in laser light propagating through a multi-mode fiber, any mode other than a radially polarized mode. Among the modes included in the laser light propagating through the multi-mode fiber, the fiber laser causes the radially polarized mode to resonate, so as to emit radially polarized laser light. The mode filter includes a long-period fiber grating obtained by writing, to a multi-mode fiber capable of guiding the radially polarized mode, a grating for selectively attenuating any waveguide mode other than the radially polarized mode. | 05-26-2011 |
20110176565 | MULTI-BEAM LASER CONTROL SYSTEM AND METHOD - A multi-beam laser beam control system includes a laser transmitter configured to emit light in a plurality of beamlets. A sensor is configured to receive light from the beamlets. A processor is communicably coupled to the sensor and configured to compute a relative phase of a wavefront of at least one beamlet based on output from the sensor. A controller is communicably coupled to the processor and to the laser transmitter. The controller is configured to adjust a phase of at least one of the beamlets. | 07-21-2011 |
20110211601 | DRIVER LASER FOR EXTREME ULTRA VIOLET LIGHT SOURCE DEVICE - A driver laser for an extreme ultra violet light source device capable of suppressing self-oscillation light, amplifying a laser beam efficiently, and reducing a device size. The driver laser has an oscillator for generating a laser beam to output the generated laser beam, and at least one amplifier for amplifying the laser beam output from the oscillator to output the amplified laser beam. The amplifier includes a discharge unit which amplifies the laser beam by using energy of a laser medium excited by discharge, a feedback mirror which leads the laser beam output from the discharge unit to the discharge unit, a polarizer which leads the laser beam output from the oscillator into the discharge unit and also reflects the laser beam output from the discharge unit to a predetermined direction, and a self-oscillation light filter which attenuates self-oscillation light output from the discharge unit. | 09-01-2011 |
20110317727 | WAVELENGTH CONVERSION LIGHT SOURCE, OPTICAL ELEMENT AND IMAGE DISPLAY DEVICE - A wavelength conversion laser light source, including a solid-state laser medium configured to generate fundamental light; a wavelength conversion element configured to convert the fundamental light into second harmonic light which has a higher frequency than the fundamental light; and a conductive material in contact with the wavelength conversion element, wherein the wavelength conversion element includes a polarization inverted structure formed with a polarization inversion region, and a first lateral surface which perpendicularly intersects with the polarization inversion region, and the conductive material is in contact with the first lateral surface. | 12-29-2011 |
20120177072 | POLARIZATION PURITY CONTROL DEVICE AND GAS LASER APPARATUS PROVIDED WITH THE SAME - A degree of polarization control device includes:
| 07-12-2012 |
20120243565 | MASTER OSCILLATOR, LASER SYSTEM, AND LASER LIGHT GENERATION METHOD - A master oscillator may include: a pumping laser that outputs pumping light; a seed laser that is oscillated by the pumping light; an amplifier that amplifies the pulsed laser light outputted by the seed laser using the pumping light; at least one optical shutter disposed in the optical path between the seed laser and the amplifier; and a controller that causes the pumping laser to oscillate continuously at a predetermined repetition rate and that controls the optical shutter to open and close. | 09-27-2012 |
20120243566 | SYSTEM AND METHOD FOR GENERATING EXTREME ULTRAVIOLET LIGHT - A system includes a chamber, a laser beam apparatus configured to generate a laser beam to be introduced into the chamber, a laser controller for the laser beam apparatus to control at least a beam intensity and an output timing of the laser beam, and a target supply unit configured to supply a target material into the chamber, the target material being irradiated with the laser beam for generating extreme ultraviolet light. | 09-27-2012 |
20120281724 | Tuneable Laser Source - Described herein is a laser ( | 11-08-2012 |
20120307851 | SYSTEM AND METHOD FOR GENERATING EXTREME ULTRAVIOLET LIGHT - A system includes a chamber, a laser beam apparatus configured to generate a laser beam to be introduced into the chamber, a laser controller for the laser beam apparatus to control at least a beam intensity and an output timing of the laser beam, and a target supply unit configured to supply a target material into the chamber, the target material being irradiated with the laser beam for generating extreme ultraviolet light. | 12-06-2012 |
20130034116 | SLAB AMPLIFICATION DEVICE, LASER APPARATUS, AND EXTREME ULTRAVIOLET LIGHT GENERATION SYSTEM - An EUV light generation system includes a driver laser comprising a master oscillator such as a semiconductor laser, a spatial filter, gas slab amplification devices, relay optical systems, and high-speed axial-flow amplifiers. The slab amplification devices include beam adjusting optical units disposed, respectively, at input and output sides of the slab amplifiers SA to convert the beam profile and/or polarization direction and/or an elongated direction of the beam profile with the slab amplifiers is parallel to a free space axis AF of the slab waveguides, i.e. parallel to the discharge electrodes. | 02-07-2013 |
20130064256 | CONTROLLABLE MULTI-WAVELENGTH LASER SOURCE - In at least one embodiment a laser system includes a fiber laser source, a polarization controller and a wavelength converter. The relative power distribution between a pump wavelength and a signal wavelength is controllable using the polarization controller. An optional phase compensator is used to control polarization state of the output laser beam. In various embodiments the relative power distribution among multiple wavelengths may be controlled over a range of at least about 100:1. | 03-14-2013 |
20130094529 | LASER APPARATUS, METHOD FOR GENERATING LASER BEAM, AND EXTREME ULTRAVIOLET LIGHT GENERATION SYSTEM - A laser apparatus for generating extreme ultraviolet (EUV) light at a wavelength of approximately 13 nm is provided. The laser apparatus may be combined with a reduced projection reflective optical system. Systems and methods for generating EUV light are also provided. | 04-18-2013 |
20130208742 | OPTICAL DEVICE, LASER APPARATUS, AND EXTREME ULTRAVIOLET LIGHT GENERATION SYSTEM - An optical device may include: an optical module disposed in a beam delivery path of a laser beam; a beam adjusting unit disposed in the beam delivery path for adjusting the beam delivery path of the laser beam; a measuring unit disposed in the beam delivery path for detecting the beam delivery path; and a control unit for controlling the beam adjusting unit based on a detection result of the beam delivery path of the laser beam detected by the measuring unit. | 08-15-2013 |
20130243016 | LASER ANTIREFLECTION DEVICE AND LASER APPARATUS COMPRISING SAME - A laser anti-reflection device includes a polarizing beam splitter, a λ/4 wave plate and an absorber disposed in an outgoing light path of a laser emitting linearly polarized light with a wavelength of λ. The linearly polarized light from the laser passes through the polarizing beam splitter and the λ/4 wave plate in turn to become a circularly polarized light beam. Part of the circularly polarized light beam is then reflected by a workpiece to be processed along the original light path and passes the λ/4 wave plate to become a linearly polarized light beam with a polarization direction vertical to that of the outgoing linearly polarized light beam. The vertical polarized beam passes the polarizing beam splitter, deviates from the light path of the outgoing linearly polarized light beam and reaches the absorber. The laser anti-reflection device prevents reflected light from damaging the laser from high power lasers. | 09-19-2013 |
20130266034 | METHODS AND APPARATUSES FOR ENGINEERING ELECTROMAGNETIC RADIATION - laser devices described may emit a beam of electromagnetic radiation having a large wavelength (e.g., mid-infrared, far-infrared) and exhibiting a low angle of divergence. In some embodiments, the wavelength of the electromagnetic radiation is between | 10-10-2013 |
20140036943 | PATTERNED RETARDER AND OPTICAL ENGINE FOR LASER PROJECTION APPARATUS - A patterned retarder is described that may be used with a laser source array to obtain a combined beam suitable for three-dimensional laser image projection using orthogonal polarization states and/or orthogonal color spaces. | 02-06-2014 |
20140050239 | POLARIZATION PURITY CONTROL DEVICE AND GAS LASER APPARATUS PROVIDED WITH THE SAME - A degree of polarization control device includes:
| 02-20-2014 |
20140056321 | OPTICAL AMPLIFIER AND PROCESS - An optical amplifier receives a seed laser having a wavelength of 1064 nm. Amplification occurs in a segmented Nd:YVO | 02-27-2014 |
20140198814 | WAVELENGTH MODULATION HETERODYNE LIGHT SOURCE - The present invention discloses a wavelength modulation heterodyne light source, which comprises: a modulation unit, a wavelength modulated light source and a birefringent crystal. The modulation unit produces a triangular or sine wave modulating signal, and transmits the modulating signal to the wavelength modulated light source to generate a wavelength modulated light signal, then the modulated light signal is refracted by the birefringent crystal with two different optical paths caused by the two different refractivity of the crystal to generate a heterodyne light. With the application of the present invention, the heterodyne light source can be made to a relatively small size and save much cost compared with known heterodyne light sources at present. | 07-17-2014 |
20140362881 | LASER BEAM COMBINING DEVICE - A laser beam combining device includes three lasers, a polarizer, and a mode converter. The second laser device, the mode converter, and the third laser device are located on a first straight line in that order. The polarizer intersects with the first straight line at an imaginary joint point. An included angle between the first straight line and the polarizer is about 45 degrees. The polarizer and the mode converter are positioned between the second laser device and the third laser device. The polarizer is adjacent to the second laser device. The mode converter is adjacent to the third laser device. The first laser device faces the polarizer and is located on a second straight line perpendicular to the first straight line and passing through the joint point. The three laser devices emit TE mode red, green and blue laser beams, respectively. | 12-11-2014 |
20150010029 | Laser Pulse Shaping Method - A laser pulse shaping method is configured for microscopically viewing and modifying an object. A temporal modulation and a two-dimensional spatial modulation of laser pulses are carried out. At least the phase of the laser pulses is modulated dependent on the location, and the modulated laser pulses are directed at the object. | 01-08-2015 |
20150311673 | Polarization Control in High Peak Power, High Brightness VCSEL - A new VCSEL design is presented to achieve high output power and high brightness with a strong selection of a linear polarization state in high speed pulsing operation. Higher output power is achieved by including multiple gain segments in tandem, in the gain region. To achieve single mode operation with high output power, an extended cavity three reflector design is presented. High degree of polarization selectivity is achieved by a linear grating deployed with the third reflector, such that lasing is allowed only in a preferred linear polarization state. A polarization selective reflector including a linear grating is designed to impart strong polarization selectivity for a preferred linear polarization state. The polarization selective reflector used as the third reflector in an extended cavity VCSEL device, exhibits strong polarization selection for a preferred linear polarization state during high speed pulsing including in the gain switching resonance regime. | 10-29-2015 |
20150333472 | BIDIRECTIONAL LONG CAVITY SEMICONDUCTOR LASER FOR IMPROVED POWER AND EFFICIENCY - The invention relates to bi-directional long-cavity semiconductor lasers for high power applications having two AR coated facets (2AR) to provide an un-folded cavity with enhanced output power. The lasers exhibit more uniform photon and carrier density distributions along the cavity than conventional uni-directional high-power lasers, enabling longer lasers with greater output power and lasing efficiency due to reduced longitudinal hole burning. Optical sources are further provided wherein radiation from both facets of several 2AR lasers that are disposed at vertically offset levels is combined into a single composite beam. | 11-19-2015 |