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| Number | Title | Issue Date |
| 8102596 | Optical fiber for amplification Provided is an erbium doped optical fiber (EDF) for amplification which allows an easy estimation of the amplification performance and high production stability. The fiber includes a core and a cladding. The core is mainly made of silica glass and doped with erbium ... | 01/24/2012 |
| 8072678 | Modular, high energy, widely-tunable ultrafast fiber source A modular, compact and widely tunable laser system for the efficient generation of high peak and high average power ultrashort pulses. System compactness is ensured by employing efficient fiber amplifiers, directly or indirectly pumped by diode lasers. Dispersive br... | 12/06/2011 |
| 8031396 | Modular, high energy, widely-tunable ultrafast fiber source A modular, compact and widely tunable laser system for the efficient generation of high peak and high average power ultrashort pulses. System compactness is ensured by employing efficient fiber amplifiers, directly or indirectly pumped by diode lasers. Dispersive br... | 10/04/2011 |
| 8023181 | Optical fiber for amplification and optical fiber amplifier Provided is an optical fiber for amplification and an optical fiber amplifier for use in L-band, in which optical fiber the increase of transmission loss and the degradation of hydrogen-resistant characteristic can be restrained. The optical fiber is basically made ... | 09/20/2011 |
| 7773295 | Optical amplication module, optical amplifier, optical communication system, and white light source The present invention relates to an optical amplifier and the like having a flatter gain spectrum in the wavelength band of 1490 nm to 1520 nm than before. The optical amplifier according to the present invention comprises an Er-doped optical waveguide and a Tm-dope... | 08/10/2010 |
| 7742224 | Optical amplification in the 850 nm window Systems and methods are disclosed for amplifying optical signals in the 850 nm window. In one embodiment, an amplifier system includes a span of Thulium-doped fiber (TDF) and two pump systems. The TDF span receives and transports optical signals in the 850 nm window... | 06/22/2010 |
| 7715094 | Optical fiber element and method for imparting non-reciprocity of light using the same The present invention provides a rare earth element-doped optical fiber amplifier having a function which allows to omit an optical isolator component, and a method for providing the optical non-reciprocity using the same. In the optical fiber, the optical fiber mat... | 05/11/2010 |
| 7551348 | Tellurite glass composite, optical waveguide and optical amplifier using the same Provided are a tellurite glass composite, an optical waveguide, and an optical amplifier using the tellurite glass composite. The tellurite glass composite includes an entire composite including 25 (mol %)≦TeO2≦90 (mol %), 1 (mol %)≦T1O | 06/23/2009 |
| 7515332 | Glass composition that emits fluorescence in infrared wavelength region and method of amplifying signal light using the same Conventional glass compositions including bismuth as a fluorescent element have a broad amplification wavelength region but do not allow the emission intensity in the 1.3-μm range to be sufficiently high through the excitation caused by light in the 0.8-μm and 0.9... | 04/07/2009 |
| 7466479 | Optical fiber for optical amplifier By optimizing the refractive index profile, the absorption coefficient of a rare earth element doped optical fiber can be enlarged and nonlinear effect can be suppressed. Thus, according to the present invention, the optical fiber, which is suitable for wide band op... | 12/16/2008 |
| 7440165 | Optical fiber Provided is an optical fiber. The optical fiber includes a core and a cladding, the core containing a first element for inducing non-linear Raman phenomenon, and the cladding containing a second element which is a rare earth element, wherein when the optical fiber i... | 10/21/2008 |
| 7440672 | Optical fiber for optical amplifier and process for manufacturing thereof The present invention relates to an optical fiber for an optical amplifier and a method for manufacturing the same, which can be applied to an optical transmission system in the S-band area (4130 nm-1530 nm). According to the present invention, silica is used as a b... | 10/21/2008 |
| 7436585 | Chirped-pulse amplifier using photonic-crystal-rod (PCR) waveguides and associated method A method and apparatus use a photonic-crystal fiber having a very large core while maintaining a single transverse mode. In some fiber lasers and amplifiers having large cores problems exist related to energy being generated at multiple-modes (i.e., polygamy), and o... | 10/14/2008 |
| 7423803 | 1-μm phosphate-glass fiber amplified spontaneous emission (ASE) source A phosphate glass 1-μm fiber ASE source provides high power and broadband emission that covers wavelengths on the short side of Yb-doped silica. A single-mode fiber formed from phosphate glass is doped with highly elevated concentrations of Yb dopants 0.5-30 wt. % ... | 09/09/2008 |
| 7400807 | Apparatus and method for a waveguide with an index profile manifesting a central dip for better energy extraction A method and apparatus is described that use an index-of-refraction profile having a significant central dip in refractive index (or another tailored index profile) within the core of a gain fiber or a gain waveguide on a substrate. The benefits of this central dip ... | 07/15/2008 |
| 7369731 | Optical fiber for amplification, optical amplifying apparatus, light source apparatus, photo-therapy apparatus, and exposure apparatus The present invention relates to an optical fiber for amplification, an optical amplifying apparatus, and so on, having a structure for enabling increase of power of output light, suppression of occurrence of nonlinear optical phenomena, and compact storage all toge... | 05/06/2008 |
| 7355788 | Active optical fiber for Raman amplification A Raman amplification active optical fiber comprises a core containing silica oxide (SiO2), lithium oxide (Li2O), germanium oxide (GeO2), and barium oxide (BaO). The core contains 30 to 90 molar percent of SiO2 and less th... | 04/08/2008 |
| 7340124 | Optical switch using rare earth doped glass The present invention provides an optical switch including a loss element having a signal loss, and a rare earth doped gain element optically connected in series with the loss element. The rare earth doped gain element is operable to produce a signal gain. The signa... | 03/04/2008 |
| 7336415 | Optical amplification module, optical amplification apparatus, and optical communications system The present invention relates to a practical optical amplification module and the like realizing a wide-band gain spectrum with a small relative gain non-uniformity in L band. Pumping light from a pumping light source is supplied to a Bi type EDF by way of an optica... | 02/26/2008 |
| 7336413 | Nonlinear fiber, wavelength conversion method and wavelength conversion device A nonlinear fiber having a third-order nonlinear coefficient of at least 30 W−1km−1, and its cladding containing Er or Tm at a portion within 3 μm from the interface with its core. A wavelength conversion method of making a signal light ha... | 02/26/2008 |
| 7333263 | Transition metal doped fiber amplifier An optical amplifier includes an optical fiber having a core doped with transition metal ions, and at least one glass cladding enclosing the core. By using the fiber, the optical amplifier of the invention has a gain bandwidth of more than 300 nm including 1300-1600... | 02/19/2008 |
| 7314610 | Dental compositions having anti-stokes up converters and methods of use A dental composition can include at least one polymerizable resin and at least one anti-stokes up converter. Alternatively, a two-part composition can include at least one dental composition configured for placement onto a person's tooth, and at least one anti-stoke... | 01/01/2008 |
| 7313306 | Fiber laser, spontaneous emission light source and optical fiber amplifier New fiber lasers, spontaneous emission sources, and optical fiber amplifiers are provided. Their conventional counterparts, which have a fiber doped with thulium (Tm) ions and excited by 0.67 μm or 0.8 μm pumping light, have a problem in that their characteristics... | 12/25/2007 |
| 7292766 | Use of glasses containing rare earth oxide, alumina, and zirconia and dopant in optical waveguides The invention provides optical waveguides comprising a glass doped with a rare earth dopant on a surface of the substrate, wherein the glass comprises (a) Al2O3, at least one of REO or Y2O3, and at least one of ZrO2 | 11/06/2007 |
| 7286587 | Holmium doped 2.1 micron crystal laser A Ho:YAG crystal laser is disclosed which is doped with less than 2% holmium to reduce the lasing threshold and up-conversion, thereby increasing the operating efficiency of the laser. The laser does not need sensitizer ions so energy mismatches introduced by the se... | 10/23/2007 |
| 7259907 | Laser-active optical fiber for a fiber laser or an optical fiber amplifier A laser-active optical fiber for a fiber laser or an optical fiber amplifier contains a laser-active fiber core (2) comprising an undoped inner region (22) which is surrounded by an outer region (24) that is doped with a laser-active material. I... | 08/21/2007 |
| 7253014 | Fabrication of light emitting film coated fullerenes and their application for in-vivo light emission A nanoparticle coated with a semiconducting material and a method for making the same. In one embodiment, the method comprises making a semiconductor coated nanoparticle comprising a layer of at least one semiconducting material covering at least a portion of at lea... | 08/07/2007 |
| 7245424 | Amplification device utilizing thulium doped modified silicate optical fiber A device amplifies light at wavelengths in the vicinity of 1420-1530 nm, using thulium doped silica-based optical fiber. This wavelength band is of interest as it falls in the low-loss optical fiber telecommunications window, and is somewhat shorter in wavelength th... | 07/17/2007 |
| 7241629 | Detectable labels, methods of manufacture and use Labels, methods of making labels and methods of using labels are disclosed. The labels can be manufactured using fiber drawing techniques or by shutter masking. The labels can be used for detecting the presence of an analyte in a sample and for detecting interaction... | 07/10/2007 |
| 7233724 | Long period bragg grating optical signal attenuation An apparatus in one example comprises one or more light sources, one or more long period Bragg gratings that are optically coupled with the one or more light sources, and one or more amplification fibers that are optically coupled with the one or more long period Br... | 06/19/2007 |
| 7233606 | Miniature pulsed fiber laser source A pulsed fiber laser and associated electronics contained in a miniature package is disclosed. The Pulsed Fiber Laser Source (PFLS) can be a single-stage high gain master oscillator power amplifier (MOPA) type fiber laser source. The PFLS can include a distributed f... | 06/19/2007 |
| 7231103 | Variable lightwave functional circuit and variable lightwave functional apparatus The system of a variable lightwave functional apparatus comprising: an acousto-optical modulator for outputting wavelength multiplexed light containing a plurality of pulses having a first wavelength interval; a coupler arranged at an output of said acousto-optical ... | 06/12/2007 |
| 7231104 | Variable lightwave functional circuit and variable lightwave functional apparatus The system of a variable lightwave functional apparatus comprising: an optical amplifier for outputting wavelength multiplexed light containing a plurality of pulses having a first wavelength interval; a polarization branching/coupling device having a first port to ... | 06/12/2007 |
| 7226966 | Structures incorporating polymer-inorganic particle blends Polymer-inorganic particle blends are incorporated into structures generally involving interfaces with additional materials that can be used advantageously for forming desirable devices. In some embodiments, the structures are optical structures, and the interfaces ... | 06/05/2007 |
| 7220809 | Optical material containing fluorine-containing polymer having functional group There is provided an optical material obtained from an organic composition which is suitable for an optical material in optical communication and comprises a fluorine-containing polymer having functional group and a rare earth metal ion, in which the fluorine-contai... | 05/22/2007 |
| 7211635 | Optical material containing curable fluorine-containing polymer There can be obtained a suitable optical material which has a stable structure with a rare earth metal ion while maintaining transparency in a region of from visible light to near infrared light. The optical material is obtained by curing a fluorine-containing resin... | 05/01/2007 |
| 7209283 | Compact optical amplifier with a flattened gain profile A flattened gain amplifier has a waveguide with a core doped with at least one species of rare earth ion. The rare earth ion has a gain profile with a first gain in a first wavelength band and a second gain in a second wavelength band. The flattened gain amplifier a... | 04/24/2007 |
| 7200291 | Variable lightwave functional circuit and variable lightwave functional apparatus Disclosed is a variable lightwave functional circuit comprising: an applying unit for applying lateral pressure; a polarization maintaining optical fiber having a polarization axis, for inducing a polarization mode coupling by applying the lateral pressure to a pred... | 04/03/2007 |
| 7192850 | Method for doping quantum dots A doping method for forming quantum dots is disclosed, which includes following steps: providing a first precursor solution for a group II element and a second precursor solution for a group VI element; heating and mixing the first precursor solution and the second ... | 03/20/2007 |
| 7180656 | Compact optical amplifier The optical amplifier has a waveguide including a core and a cladding. The cladding at least partially surrounds the core and is doped with at least one species of rare earth ion in the range of 5 to 75 wt %. In another embodiment, the core is doped with Er3+ | 02/20/2007 |
