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| Number | Title | Issue Date |
| 8175133 | Laser-induced optical wiring apparatus A laser-induced optical wiring apparatus is provided wherein optical wiring is realized by digital operations of a laser oscillator. The apparatus includes optical ring resonator formed of a loop-shaped optical waveguide on substrate. At least two optical gain secti... | 05/08/2012 |
| 8000372 | Traveling-wave laser having a resonator including a direction-sensitive interferometer for establishing unidirectional circulation A laser includes a traveling-wave ring-resonator in which one resonator mirror is a mirror of an interferometer arranged such that, when the interferometer is operated in an anti-resonant condition, the mirror has a greater effective reflectivity for clockwise circu... | 08/16/2011 |
| 7957449 | Two-stage laser system for aligners The invention relates to a two-stage laser system well fit for semiconductor aligners, which is reduced in terms of spatial coherence while taking advantage of the high stability, high output efficiency and fine line width of the MOPO mode. The two-stage laser syste... | 06/07/2011 |
| 7936803 | External cavity semiconductor laser An external cavity semiconductor laser including a first and second input-output section disposed on a common end surface via a center axis, and a semiconductor laser device emitting a first and second laser light from the first and second input-output sections in t... | 05/03/2011 |
| 7876803 | High-power, pulsed ring fiber oscillator and method A ring laser includes a large-core rare-earth-doped fiber ring-connected with a free-space path having an electro-optic switch, output coupler, and intracavity band-pass filter to enforce lasing operation in narrow wavelength range. In some cavity-dumped modes, the ... | 01/25/2011 |
| 7843986 | Planar lightwave circuit and tunable laser device having the same To prevent the property of an optical filter from being changed even if there is a change in a gap of directional couplers generated due to variations in manufacturing conditions so as to improve the yield. A tunable laser device includes a PLC and an SOA. The PLC i... | 11/30/2010 |
| 7835417 | Narrow spectrum light source An apparatus and method are disclosed for decreasing the spectral bandwidth of a semiconductor laser, such as a vertical cavity surface emitting laser. ... | 11/16/2010 |
| 7822093 | Method and apparatus for changing the length of a laser pulse The apparatus for extending or lengthening a laser pulse has a beam splitter. An incident laser pulse is split by the beam splitter into at least one first partial pulse and a second partial pulse. The first partial pulse is conducted through a delaying travel path ... | 10/26/2010 |
| 7738527 | Wavelength switchable semiconductor laser using half-wave coupled active double-ring resonator A semiconductor laser comprises two optical ring resonators, each comprising an optical waveguide electrically pumped to provide optical gain. The two ring resonators have different round-trip optical path lengths, and are coupled to each other through a half-wave o... | 06/15/2010 |
| 7697587 | Systems and methods for utilizing pulsed radio frequencies in a ring laser gyroscope Ring laser gyroscope that includes a gyroscope block, a radio frequency transmitting device, and a radio frequency energy source. The gyroscope block has at least one discharge bore containing a gain medium, and the radio frequency transmitting device is located wit... | 04/13/2010 |
| 7664156 | Wavelength tunable laser A wavelength tunable laser comprises a multiple ring resonator, an input/output side waveguide coupled to a ring resonator, a reflection side waveguide coupled to a ring resonator, a multiple ring resonator, a PLC substrate where the input/output side waveguide and ... | 02/16/2010 |
| 7664157 | Tunable laser A tunable laser has a multiple ring resonator comprising a plurality of ring resonators having respective ring-shaped waveguides and respective different optical path lengths, an input/output side optical waveguide coupled to the multiple ring resonator, an optical ... | 02/16/2010 |
| 7656928 | Laser-induced optical wiring apparatus A laser-induced optical wiring apparatus is provided wherein optical wiring is realized by digital operations of a laser oscillator. The apparatus includes optical ring resonator formed of a loop-shaped optical waveguide on substrate. At least two optical gain secti... | 02/02/2010 |
| 7639723 | Tunable laser, optical module, and control method thereof A tunable laser is provided, including: a multiple ring resonator that is formed by coupling ring resonant elements having different optical path length from each other; an input/output-side waveguide connected to one of the ring resonant elements; a reflection-side... | 12/29/2009 |
| 7577178 | Narrow linewidth injection seeded Q-switched fiber ring laser based on a low-SBS fiber A narrow linewidth injection-seeded Q-switched fiber ring laser based on a low-SBS optical fiber. High peak powers are achieved through the use of a single-clad erbium doped fiber with an acoustic waveguide. 12.5 μJ per pulse (250ns pulse width) is achieved before ... | 08/18/2009 |
| 7548573 | Rotary disk, rotary disk module, and rotary disk laser and amplifier configurations There is provided a rotary disk laser module including disk comprised of at least one lasing material. The disk further includes a first surface, a second surface and a gain region. The gain region contains excited lasing material and extends between the first and s... | 06/16/2009 |
| 7548572 | Stabilized solid-state laser gyroscope The field of the invention is that of solid-state laser gyros. One of the major problems inherent in this technology is that the optical cavity of this type of laser is by its nature highly unstable. To reduce this instability, the invention proposes to introduce co... | 06/16/2009 |
| 7532656 | All-silicon raman amplifiers and lasers based on micro ring resonators Devices for generating a laser beam are disclosed. The devices include a silicon micro ring having at least one silicon optical waveguide disposed at a distance from the micro ring. The radius and the cross-sectional dimension of the microring, the cross-sectional d... | 05/12/2009 |
| 7532657 | Laser oscillator incorporating transverse mode rotation in the laser resonator A laser oscillator, including an optical resonator, an optical amplifier element on an optical path inside the optical resonator, (i) the optical path in the optical resonator having an even number of optical reflections per resonator circuit or round-trip, (ii) the... | 05/12/2009 |
| 7502405 | Semiconductor system having a ring laser fabricated by expitaxial layer overgrowth The present invention provides a ring laser system comprising forming an optical core by an epitaxial layer overgrowth over an intermediate layer, forming multi-quantum wells adjacent to the optical core and forming an outer structure further comprising a total inte... | 03/10/2009 |
| 7440643 | Variable light controlling device and variable light controlling method A variable light controlling device comprising a substrate, an optical waveguide disposed on the substrate, a first heater and a second heater to change the optical waveguide's temperature is fabricated. And a total amount of the power supplied to the first and the ... | 10/21/2008 |
| 7436862 | Self-similar laser oscillator A laser producing high energy ultrashort laser pulses comprises a normal dispersion segment, a gain segment, an anomalous dispersion segment with negligible nonlinearity and an effective saturable absorber arranged to form a laser cavity. Each segment is optically i... | 10/14/2008 |
| 7430348 | Four-port optical filter fabricated from tapered optical fiber A four-port optical filter is provided including two tapered optical fibers, each having a loop in the area of their tapered portions, which are located relative to one another to form a ring resonator. The optical filter has a low Q with a broadband filter response... | 09/30/2008 |
| 7415178 | Spiral waveguide slow wave resonator structure An optical microresonator includes microcylinder and spiral resonant waveguide formed on the microcylinder that optically couples light from an optical source waveguide to the microcylinder and slows light propagating along the microcylinder. A coupling element, for... | 08/19/2008 |
| 7406226 | Circular grating resonator structure with integrated electro-optical modulation An optical structure includes a substrate, a circular grating resonator (CGR) formed on the substrate, the CGR including a center disc and a plurality of concentric rings spaced from one another; an input planar waveguide and an output planar waveguide each formed o... | 07/29/2008 |
| 7400797 | Transverse closed-loop resonator A transverse closed-loop fiber resonator (10) includes an inner cladding (102) having a surface (300) peripherally forming a closed-loop shape for confining light to the surface (300). The inner cladding has a first diameter thickness ( | 07/15/2008 |
| 7389028 | Multiple resonator and variable-wavelength light source using the same An external resonator which includes a multiple resonator with parameters which allow stable wavelength control, and a variable-wavelength light source includes such an external resonator are provided. The external resonator is a multiple resonator which is made up ... | 06/17/2008 |
| 7382810 | Widely-tunable laser apparatus A widely-tunable laser apparatus comprises a plurality of tunable lasers having different ranges that overlap to encompass a desired operating range of wavelengths (for example from 1250 nm to 1650 nm) of the widely-tunable laser apparatus. The tunable lasers are tu... | 06/03/2008 |
| 7376167 | Tunable ring laser with external grating operation in a single mode A tunable lasing device (100) comprising a ring-shaped laser cavity (102), an optical gain element (104), a bi-directional output coupler (106) and a frequency selection means (114). The frequency selection means is generally a gra... | 05/20/2008 |
| 7376309 | Optical structure An optical structure comprising an optical resonator is provided. The optical resonator comprises a first set of nested closed optical regions, forming a distributed feedback resonator structure with a direction of radially alternating optical refractive index, and ... | 05/20/2008 |
| 7369597 | Laser output light pulse stretcher Providing a high peak power short pulse duration gas discharge laser output pulse comprises a pulse stretcher a laser output pulse optical delay initiating optic diverting a portion of the output laser pulse into an optical delay having an optical delay path and com... | 05/06/2008 |
| 7365369 | Nitride semiconductor device A nitride semiconductor device used chiefly as an LD and an LED element. In order to improve the output and to decrease Vf, the device is given either a three-layer structure in which a nitride semiconductor layer doped with n-type impurities serving as an n-type co... | 04/29/2008 |
| 7357691 | Method for depositing carbon nanotubes on a substrate of a field emission device using direct-contact transfer deposition A preferred method for making a carbon nanotube-based field emission device in accordance with the invention includes the following steps: providing a substrate (22) with a surface; depositing a catalyst layer (24) on a predetermined area on the surfac... | 04/15/2008 |
| 7352783 | Tunable fiber laser light source A loop is formed with an optical fiber by providing a gain medium having a gain with respect to an oscillation wavelength. Light retrieved by the optical circulator 13 from the optical fiber loop is enlarged and projected to a mirror 23. A diffraction ... | 04/01/2008 |
| 7343067 | Precise and permanent modification of the resonant frequency of a dielectric microcavity and correction of frequency shifts in dielectric coupled-resonator filters A coupled resonator includes a plurality of resonators such that at least one of the resonators is modified so as to adjust the resonant frequency associated with the coupled resonator. ... | 03/11/2008 |
| 7336684 | Planar multiwavelength optical power supply on a silicon platform A microphotonic light source includes an optical pump and a plurality of waveguides that distribute optical pump power of the optical pump. At least one Erbium-doped laser ring is coupled to at least one of the waveguides so as to match the resonance condition of th... | 02/26/2008 |
| 7333691 | Low loss tunable ring resonator allpass filter An apparatus, including an optical ring resonator having a waveguide ring with substantially straight waveguide segments and bent waveguide segments. The bent waveguide segments are optically coupled to the substantially straight waveguide segments and have optical ... | 02/19/2008 |
| 7327768 | Wavelength conversion module A wavelength conversion module according to the present invention includes an external resonator, a semiconductor laser module and a wavelength conversion device for converting a wavelength of light output from the semiconductor laser module into a shorter wavelengt... | 02/05/2008 |
| 7321468 | Method and optical arrangement for beam guiding of a light beam with beam delay A method for beam guiding of a light beam generated by a light source to a target location along a path distance LS, comprises splitting the light beam on the path distance LS at least once into a first partial beam and a second partial beam, g... | 01/22/2008 |
| 7319513 | Stabilized solid state gyrolaser without blind region The invention concerns solid-state gyrolasers used to measure rotation speeds or relative angular positions. This type of equipment is used, in particular, in aeronautical applications. The purpose of the invention is to complete the optic devices required to... | 01/15/2008 |
