Patent application number | Description | Published |
20080267229 | Optical fiber, optical fiber production method and optical fiber production system - An optical fiber includes a rare-earth element-added core for serving as a gain medium, and a cladding formed on a periphery of the core. Pump light propagated through the cladding is coupled into the core. The cladding is in an undulation shape in the longitudinal direction of the cladding. The undulation shape of the cladding is formed according to a grating period at which the pump light is totally reflected and propagated in the cladding. The core includes an undulation shape in a longitudinal direction of the core. The cladding includes an undulating inner cladding, and an outer cladding provided on a periphery of the inner cladding. The core and/or the cladding is circular or abnormally circular in its transverse cross section. | 10-30-2008 |
20080292248 | Optical fiber, optical fiber connection structure and optical connector - An optical fiber includes a core, a clad having a plurality of air holes at a periphery of the core, and a hardening resin filled in a sealed portion at an end of the plurality of air holes. The hardening resin after hardening has a fill length of 7 mm to 8 mm. An optical fiber connection structure includes the optical fiber with an end face butt-connected to another optical fiber. An optical connector includes the optical fiber, and a ferrule to which the optical fiber is attached. | 11-27-2008 |
20090052476 | Optical fiber for an optical fiber laser, method for fabricating the same, and optical fiber laser - The optical fiber | 02-26-2009 |
20090052840 | Optical waveguide type optical coupling arrangement - A plurality of light emitting elements | 02-26-2009 |
20090080472 | Optical fiber for an optical fiber laser, method for fabricating the same, and optical fiber laser - The optical fiber | 03-26-2009 |
20090129411 | OPTICAL FIBER LASER AND EXCITING METHOD USING SAME - An optical fiber laser, according to the present invention, has an optical fiber including a core to which a rare earth element is added and a clad disposed around the core, and also has an excitation light source for emitting excitation light incident on a side of the optical fiber. The optical fiber has a corrugated shape on the outer circumference of the clad along the longitudinal direction thereof; and the optical fiber is wound in a spiral form and is bundled in such a way that adjacent sides of the clad are brought into contact with one another. | 05-21-2009 |
20090316733 | OPTICAL FIBER FOR A FIBER LASER AND FIBER LASER USING THE SAME - The present invention provides an optical fiber, for use in a fiber laser, from which a high-quality single-mode laser beam with high optical power is obtained and also provides a fiber laser that uses the optical fiber. The novel optical fiber, which includes a core to which a rare earth element is doped and a cladding formed around the core, amplifies excitation light to oscillate a laser beam. A mode filter is formed at a predetermined position in the longitudinal direction of the optical fiber. | 12-24-2009 |
20110103758 | OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME - An optical fiber comprising: a core formed in a center axis area; an inner clad layer, disposed around the core, having a refractive index smaller than that of the core; a pore layer, disposed around the inner clad layer, having a plurality of elongated pores; and an outer clad layer, disposed around the pore layer, having a refractive index equal to or smaller than the refractive index of the core, wherein a length of the elongated pores is not larger than 200 m. | 05-05-2011 |
20130016949 | MULTICORE FIBERAANM YAO; BingAACI HitachiAACO JPAAGP YAO; Bing Hitachi JPAANM OHSONO; KazumasaAACI HitachiAACO JPAAGP OHSONO; Kazumasa Hitachi JPAANM SHIINA; NoribumiAACI HitachiAACO JPAAGP SHIINA; Noribumi Hitachi JP - A multicore fiber includes cores located at vertexes of a polygonal ring and a cladding including sub medium regions and covering the cores. A refractive index of the cladding is lower than a refractive index of the cores and higher than a refractive index of the sub medium regions. The sub medium regions are arranged at positions to reduce a crosstalk between adjacent cores of the cores. | 01-17-2013 |