Patent application number | Description | Published |
20080317418 | NONLINEAR OPTICAL FIBER, NONLINEAR OPTICAL DEVICE, AND OPTICAL SIGNAL PROCESSING APPARATUS - A core includes a center core region, a core layer that is formed around the center core region and that has a refractive index lower than that of the center core layer, and at least one buffer core layer that is formed between the center core region and the core layer and that has a refractive index lower than that of the center core region and higher than that of the core layer. A cladding is formed around the core layer and that has a refractive index lower than that of the center core region and higher than that of the core layer. An effective core area at a wavelength of 1550 nm is equal to or smaller than 18 μm | 12-25-2008 |
20090003786 | OPTICAL FIBER MODULE AND OPTICAL DEVICE - An optical fiber module includes an optical fiber that transmits a light and a holding unit that holds the optical fiber in a state in which the optical fiber is stretched in its longitudinal direction to change optical characteristics of the optical fiber. | 01-01-2009 |
20090028509 | OPTICAL FIBER DEVICE - An optical fiber device converts an input optical pulse having a predetermined center wavelength into an optical pulse having a wavelength bandwidth broader than that of the input optical pulse. The optical fiber device includes a plurality of optical fibers connected in a cascaded manner each having negative wavelength dispersion at the center wavelength. The optical fibers have different relative refractive index differences between a core region and a cladding region from each other. The optical fibers are connected such that wavelength dispersions of adjacent optical fibers at the center wavelength are different from each other. | 01-29-2009 |
20090257724 | NONLINEAR OPTICAL FIBER, NONLINEAR OPTICAL DEVICE, AND OPTICAL SIGNAL PROCESSING APPARATUS - A core includes a center core region, a core layer that is formed around the center core region and that has a refractive index lower than that of the center core layer, and at least one buffer core layer that is formed between the center core region and the core layer and that has a refractive index lower than that of the center core region and higher than that of the core layer. A cladding is formed around the core layer and that has a refractive index lower than that of the center core region and higher than that of the core layer. An effective core area at a wavelength of 1550 nm is equal to or smaller than 18 μm | 10-15-2009 |
20100150507 | HOLEY FIBER - A holey fiber includes a core portion and a cladding portion positioned around a periphery of the core portion. The cladding portion includes 12 to 36 holes that are arranged circularly at a radius of 36 to 48 micrometers around a center of the core portion and that each have a hole diameter of 2.0 to 11.0 micrometers. At a wavelength of 1064 nanometers the holey fiber substantially performs a single-mode operation and has an effective core area equal to or greater than 1500 μm | 06-17-2010 |
20110026890 | HOLEY FIBERS - A holey fiber with significantly large effective core area is provided. | 02-03-2011 |
20110091176 | HOLEY FIBERS - A holey fiber with significantly large effective core area is provided. The holey fiber comprises a core portion and a cladding portion at the circumference of the core portion. The cladding portion has plurality of holes distributed to shape triangular lattices around the core portion; wherein d/Λ is less than or equal to 0.42, the diameter of the holey fiber is larger than or equal to 580 μm, an effective core area is larger than or equal to 15000 μm | 04-21-2011 |
20120156062 | ELECTROMAGNETIC CLUTCH, COMPRESSOR, AND MANUFACTURING METHOD FOR ELECTROMAGNETIC CLUTCH - When grooves | 06-21-2012 |
20120195560 | OPTICAL FIBER MODULE - An optical fiber module includes a polarization-maintaining highly-nonlinear optical fiber and a housing. The polarization-maintaining highly-nonlinear optical fiber includes a core, a cladding surrounding the core and having two stress applying portions formed to sandwich the core and extend along the core, and a coating covering the cladding. The housing houses the polarization-maintaining highly-nonlinear optical fiber which is wound in a ring coil shape. The polarization-maintaining highly-nonlinear optical fiber has a bending loss of 0.01 dB/turn or less at a wavelength of 1550 nm when bent to form a diameter of 20 mm, a nonlinear coefficient γ of 10 W | 08-02-2012 |
20140241683 | OPTICAL WAVEGUIDE ELEMENT AND METHOD OF PRODUCING THE SAME - An optical waveguide element includes a cladding portion made of a silica-based glass, and an optical waveguide positioned in the cladding portion and made of a silica-based glass in which a ZrO | 08-28-2014 |