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| Number | Title | Issue Date |
| 8023549 | Tuning method of external cavity laser diode, variable wavelength laser module, and program of external cavity laser diode tuning A tuning methods of an External Cavity Laser Diode (ECLD), comprises steps of: (1) providing a laser light to a grating so as to tilt the grating to an optical axis of a collimated laser light, (2) adjusting the orientation of the grating relative to the collimated ... | 09/20/2011 |
| 8018982 | Sliced fiber bragg grating used as external cavity for semiconductor laser and solid state laser A Fiber Bragg grating is sliced into small segments (such as 1 mm in length), the sliced fiber Bragg grating segments are used as external cavities for lasers to stabilize their center wavelength. In one embodiment, a semiconductor laser has an anti-reflection coati... | 09/13/2011 |
| 8000374 | Surface gratings on VCSELs for polarization pinning A polarization pinned vertical cavity surface emitting laser (VCSEL). A VCSEL designed to be polarization pinned includes an upper mirror. An active region is connected on the upper mirror. A lower mirror is connected to the active region. A grating layer is deposit... | 08/16/2011 |
| 7899105 | Temperature control system for a frequency converted diode laser Apparatus and methods of controlling a frequency-converted diode laser system are disclosed. The diode laser systems can include embodiments of thermally coupled elements facilitating temperature stabilization. Aspects of some methods include monitoring the output o... | 03/01/2011 |
| 7889776 | High-power semiconductor laser A light source includes a semiconductor laser diode and a narrow spectral and spatial bandwidth reflector in optical communication with respect to the semiconductor diode laser and aligned with the output beam of the diode laser, such that a portion of the light in ... | 02/15/2011 |
| 7856046 | Surface emitting laser diode including grating layer A surface emitting laser diode includes a ring-shaped first semiconductor layer including an n-type clad layer, a ring-shaped active layer provided on the first semiconductor layer, and a ring-shaped second semiconductor layer which is provided on the active layer a... | 12/21/2010 |
| 7848382 | Laser source that generates a plurality of alternative wavelength output beams A laser source (10) for emitting a set of sequential, different wavelength output beams (12) includes a gain medium (16), a feedback assembly (26) and a control system (30). The gain medium (16) includes a first facet (16... | 12/07/2010 |
| 7830946 | Grating enhanced solid-state laser amplifiers A novel method and apparatus for suppressing ASE and parasitic oscillation modes in a high average power laser is introduced. Such an invention, as disclosed herein, uses diffraction gratings to increase gain, stored energy density, and pumping efficiency of solid-s... | 11/09/2010 |
| 7822095 | Vertical cavity laser faceplate with diffraction grating A laser having a laser cavity is disclosed that does not require conventional dielectric mirrors or as-grown reflectors. Instead, a diffraction grating and total internal reflection system is used to define a laser cavity. Within the laser cavity, the laser emission... | 10/26/2010 |
| 7822096 | Alignment and wavelength selection in external cavity lasers A method of operating a laser projection system is provided. The projection system comprises an external cavity laser, an optical intensity monitor, laser projection optics, and a controller. The external cavity laser comprises a laser diode, an intra-cavity wavelen... | 10/26/2010 |
| 7817705 | 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 des... | 10/19/2010 |
| 7804882 | Nitride semiconductor laser element A nitride semiconductor laser element, comprises a substrate and a nitride semiconductor layer in which a first semiconductor layer, an active layer, and a second semiconductor layer are laminated in this order on the substrate, wherein recessed and raised portions ... | 09/28/2010 |
| 7778305 | Mirror structure and laser device comprising such a mirror structure For increasing the power emitted by surface emitting lasers and for improving the spatial coherence of the laser beam, emitted in particular by disk lasers, microchip lasers and VCSELs having a relatively wide emitting area, the invention proposes to select a low or... | 08/17/2010 |
| 7697589 | Use of volume Bragg gratings for the conditioning of laser emission characteristics Apparatus and methods for altering one or more spectral, spatial, or temporal characteristics of a light-emitting device are disclosed. Generally, such apparatus may include a volume Bragg grating (VBG) element that receives input light generated by a light-emitting... | 04/13/2010 |
| 7643532 | Manufacturable sampled grating mirrors The present invention relates to the tailoring the reflectivity spectrum of a sampled-grating distributed Bragg reflector (SGDBR) by applying digital sampling theory to choose the way each reflector is sampled. The resulting mirror covers a larger wavelength span an... | 01/05/2010 |
| 7630426 | Wavelength detector, wavelength stabilization laser device, and image display device A wavelength detector detecting a change of a wavelength of a laser light with high accuracy, such that the wavelength detector includes a diffraction grating diffracting a laser light, photodetectors positioned symmetrically with respect to a 0-order diffracted lig... | 12/08/2009 |
| 7627018 | Polarization control using diffraction gratings in VCSEL waveguide grating couplers A VCSEL waveguide grating coupler is provided such that a first and second mirror are positioned to define a resonant cavity between them. The waveguide grating coupler further includes a waveguide having a first grating formed as a part of the waveguide to couple l... | 12/01/2009 |
| 7620093 | Laser device, laser module, semiconductor laser and fabrication method of semiconductor laser A semiconductor laser has first and second diffractive grating regions. The first diffractive grating region has segments, has a gain, and has first discrete peaks of a reflection spectrum. The second diffractive grating region has segments combined to each other, a... | 11/17/2009 |
| 7609746 | Light source device, image display device, projector, illumination device, and monitor device A light source device generates irradiation light that is irradiated onto a predetermined face, the light source device including: a laser light source that emits laser light; a diffractive optical element that diffracts the laser light; a diffusion optical element ... | 10/27/2009 |
| 7590162 | Chirped bragg grating elements Apparatus and methods for altering one or more spectral, spatial, or temporal characteristics of a light-emitting device are disclosed. Generally, such apparatus may include a volume Bragg grating (VBG) element that receives input light generated by a light-emitting... | 09/15/2009 |
| 7583719 | Complex-coupled distributed feedback semiconductor laser A distributed feedback semiconductor laser may have (1) a controlled complex-coupling coefficient which is not affected by grating etching depth variation, and (2) facet power asymmetry with no facet reflection which eliminates a random effect of facet grating phase... | 09/01/2009 |
| 7567608 | Volume Bragg grating laser mirror device A volume Bragg grating (VBG) has a narrow wavelength. The wavelength is changed by changing an angle of the VBG or a temperature of the VBG. Thus, the present invention has a narrow wavelength, a bright laser, a simple system and an adjustable reflection for a wide ... | 07/28/2009 |
| 7545844 | Use of Bragg grating elements for the conditioning of laser emission characteristics Apparatus and methods for altering one or more spectral, spatial, or temporal characteristics of a light-emitting device are disclosed. Generally, such apparatus may include a volume Bragg grating (VBG) element that receives input light generated by a light-emitting... | 06/09/2009 |
| 7519096 | Process and apparatus for a wavelength tuning source An apparatus and source arrangement for filtering an electromagnetic radiation can be provided which may include at least one spectral separating arrangement configured to physically separate one or more components of the electromagnetic radiation based on a frequen... | 04/14/2009 |
| 7496127 | Optical device coupling light propagating in optical waveguide with diffraction grating An optical waveguide propagates a laser beam. Main diffraction grating and sub-diffraction grating couple light propagating in the optical waveguide. The main diffraction grating and the sub-diffraction grating couple the light in such a manner that propagation in a... | 02/24/2009 |
| 7463668 | Wavelength tunable cavity with rotational movement A wavelength tunable cavity includes a first reflecting unit adapted to at least partially reflect a beam of electromagnetic radiation towards a second reflecting unit, adapted to at least partially reflect a beam of electromagnetic radiation back towards said first... | 12/09/2008 |
| 7450626 | Lasers that operate independently of temperature Apparatus, methods, systems and devices for providing a temperature independent laser by determining a temperature dependence of a lasing wavelength, selecting the lasing wavelength having minimal temperature dependence and constraining the lasing wavelength of the ... | 11/11/2008 |
| 7436866 | Combination optical isolator and pulse compressor Optical systems configured for both changing the length of a laser pulse and operating as an optical isolator are disclosed. In some embodiments, optical isolation is achieve contemporaneously with laser pulse expansion or compression by using a grating based compre... | 10/14/2008 |
| 7430227 | Wavelength tunable laser source with parameter correction A wavelength tunable laser unit has a laser mode selection, and is adapted to provide a laser signal in accordance with one or more laser control parameters. For operating the laser unit, the laser signal is swept in a wavelength range, a laser operation signal indi... | 09/30/2008 |
| 7426229 | Line narrowing module, light source of exposure apparatus comprising the same, and method of producing exposure light using line narrowing A line narrowing module includes an elliptical mirror, a diffraction grating disposed at a first focus of the mirror for separating an incident beam into different lines, and a laser beam dispersion and extraction unit. The laser beam dispersion and extraction unit ... | 09/16/2008 |
| 7421164 | Method for fabricating laser diode having optical fiber Bragg grating as front mirror of external resonator and laser diode fabricated thereby A method for fabricating a laser includes preparing an optical fiber including the optical fiber Bragg grating formed at a region thereof, and a ferrule provided with a cylindrical free space penetrating both ends thereof; applying a first thermal epoxy resin to a p... | 09/02/2008 |
| 7421003 | Emission wavelength-programmable organic distributed feedback laser An organic distributed feedback layer, which comprises a resonator in a double layer structure comprising a photo-induced mass transfer material layer and an organic fluorescence layer, provided as an under layer below the former layer, where the photo-induced mass ... | 09/02/2008 |
| 7397837 | Apparatus and methods for altering a characteristic of a light-emitting device Apparatus and methods for altering one or more spectral, spatial, or temporal characteristics of a light-emitting device are disclosed. Generally, such apparatus may include a volume Bragg grating (VBG) element that receives input light generated by a light-emitting... | 07/08/2008 |
| 7394842 | Volume bragg lasers based on high efficiency diffractive elements in photo-thermo-refractive glass A volume Bragg laser including a resonator comprising photo-thermo-refractive (PTR) volume diffractive elements that can be used in a laser emitting window of transparency of PTR glass to provide control of the lasers spectral and angular parameters, and methods, de... | 07/01/2008 |
| 7386021 | Light source In a first broad aspect, the invention provides a light source. The light source includes a semiconductor laser for emitting laser light at a first frequency. The light source also includes an optical fibre that includes a fibre Bragg grating. The fibre Bragg gratin... | 06/10/2008 |
| 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 |
| 7382809 | Tunable fiber laser light source An optical fiber loop has a gain medium having a gain at an oscillation wavelength and optical circulators 13 and 14. Collimate lenses 22 and 24 enlarge light bean taken from the optical circulators 13 and 14. A polygon mirr... | 06/03/2008 |
| 7382808 | Apparatus and method for spatial mode selection of planar waveguide and thin slab lasers in the large cross section size direction A method and apparatus for spatial mode selection of planar waveguide and thin slab lasers in the laser's large cross section size direction. The planar laser has a small cross section size direction orthogonal to a major axis thereof and a large cross section size ... | 06/03/2008 |
| 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 |
| 7376168 | Semiconductor laser device The invention relates to a semiconductor laser device, including a semiconductor laser element, or a number of individual lasers mounted parallel to each other, with a number of output surfaces, from which laser light can escape, having a treater divergence in a fir... | 05/20/2008 |
