| Patent Number |
Title Of Patent |
Date Issued |
| 7436583 |
Optical amplification fiber, optical amplifier module, optical communication system and optical |
October 14, 2008 |
| The present invention relates to an optical amplification fiber and others capable of effectively reducing nonlinear interaction between signal channels even in transmission of multiplexed signal light containing multiple signal channels arranged in high density and also effectively |
| 7277616 |
Optical fiber bundle and method of manufacturing the same |
October 2, 2007 |
| An optical fiber bundle that has better ultraviolet resistance characteristics at a wavelength range of 150 to 250 nm and that can be readily and cheaply manufactured with no risk of, for example, explosion during manufacturing and its manufacturing method are provided. In the optica |
| 7203399 |
Optical fiber and fiber grating type filter including the same |
April 10, 2007 |
| The present invention relates to an optical fiber having a structure which allows further improvements to be made both in terms of lower reflectance and narrower bandwidth, and to a fiber grating type filter including the optical fiber. The optical fiber applied to the fiber grating type |
| 7170674 |
Fluorescence glass, optical wave guide for optical amplifier and optical amplifier module |
January 30, 2007 |
| The present invention provides fluorescent glass containing at least 50 mol % of at least one kind of oxide selected from the group consisting of SiO.sub.2, GeO.sub.2, and P.sub.2O.sub.5 as a glass constituent of a region containing a Bi ion as a dopant. |
| 7130513 |
Glass-body-producing method and optical glass body and optical fiber |
October 31, 2006 |
| A method produces a glass body that contains a reduced amount of OH groups in the metallic-oxide-containing glass layer and that has a reduced amount of transmission loss due to OH groups when the glass body is transformed into an optical fiber. The production method produces an opti |
| 7016582 |
Polarized wave holding optical fiber, and method of producing the same |
March 21, 2006 |
| Based on an intermediate 20A in which a cladding portion 22 is formed on the outer periphery of a core portion 21, a pair of holes 23 and 24 are provided parallel to the z axis on both sides of the core portion 21 within the cladding portion 22, and an intermediate 20 is thereby fabr |
| 6868213 |
Optical fiber and production method therefor |
March 15, 2005 |
| The present invention provides an optical fiber which has a hollow portion extending along the axis and which reduces degradation of the optical characteristics, and a production method thereof. An optical fiber includes a hollow core portion, and a cladding portion which surrounds the |
| 6842566 |
Optical fiber with built-in grating and optical fiber for forming grating therein |
January 11, 2005 |
| The present invention provides an optical fiber equipped with a grating that functions as a narrow-band loss filter. The optical fiber has a core, an inner cladding, an intermediate cladding, and an outer cladding, which have refractive indexes n.sub.0, n.sub.1, n.sub.2, and n.sub.3, |
| 6813065 |
Raman amplifier and optical communication system |
November 2, 2004 |
| Disclosed are a gain module and an optical communication system which have gain in a broad wavelength range and are of low cost. The gain module 10 has two optical fibers 11.sub.1 and 11.sub.2 which differ from each other with respect to the composition of their respective optical wavegu |
| 6805497 |
Optical transmission line |
October 19, 2004 |
| An optical transmission line including a portion formed by fusion-splicing optical fibers having structures different from each other; wherein, in the optical fibers having structures different from each other, a first optical fiber 1 has a mode field diameter smaller than that of a seco |
| 6788874 |
Optical component |
September 7, 2004 |
| An optical component is an optical fiber grating element having a grating formed in the core region of an optical fiber, and a cladding region is made of silica glass. An optical material for the core region is ladder-type silicone resin, whose refractive index is set to a desired va |
| 6785444 |
Optical fiber grating device |
August 31, 2004 |
| An optical fiber grating device 1 is a device in which a long period grating 14 is formed in a core region 11 of an optical fiber 10 consisting of the core region 11 having a refractive index n.sub.1 and an outside diameter 2a, a first cladding region 12 surrounding the core region 11 an |
| 6771415 |
Optical fiber for optical amplifier and fiber optic amplifier |
August 3, 2004 |
| An optical fiber for optical amplification used for 1.58 .mu.m band signal light amplification, at least a core region thereof being doped with Er has a core region at least a part thereof made of silica glass co-doped with Ge and Al together with Er, and Er average atomic concentration |
| 6728458 |
Optical fiber and fiber grating device |
April 27, 2004 |
| An optical fiber comprises a core region, an inner cladding region, and an outer cladding region. Each of the core region and inner cladding region is doped with GeO.sub.2, whereas the inner cladding region is also doped with F element. The core region has a refractive index higher than |
| 6687439 |
Light-amplifying optical fiber and method of making the same |
February 3, 2004 |
| The present invention relates to a light-amplifying optical fiber comprising a structure for realizing a flat gain characteristic or oscillation characteristic in a wider wavelength band, and a method of making the same.The light-amplifying optical fiber according to the present inventio |
| 6661954 |
Optical transmission line including a connected part of optical fibers and connecting method |
December 9, 2003 |
| Provided are an optical transmission line including a connected part of the optical fibers having different refractive index profiles, wherein at least one of the optical fibers has a hollow region, and a method for connecting such optical fibers, wherein connection loss in a connection |
| 6618532 |
Optical transmission line |
September 9, 2003 |
| An optical transmission line having reduced flunctions in transmission quality is formed with a structure in which first and second waveguides whose transmission characteristics at a predetermined wavelength in a wavelength band in use are set opposite to each other and are arranged |
| 6611637 |
Dispersion-compensating module |
August 26, 2003 |
| The present invention relates to a dispersion-compensating module functioning to compensate for the chromatic deviation occurring in an optical transmission line and comprising a structure adapted to be easily inserted in an optical transmission system. The dispersion-compensating mo |
| 6597849 |
Optical fiber and optical component including the same |
July 22, 2003 |
| The present invention relates to an optical fiber having a sufficient strength, in which not only a core region but also a cladding region contains GeO.sub.2, and an optical component including the same. The optical fiber has an outer diameter D; and comprises a core region, a first |
| 6577440 |
Optical fiber for optical amplifier and fiber optic amplifier |
June 10, 2003 |
| An optical fiber for optical amplification used for 1.58 .mu.m band signal light amplification, at least a core region thereof being doped with Er has a core region at least a part thereof made of silica glass co-doped with Ge and Al together with Er, and Er average atomic concentration |
| 6563989 |
Optical fiber coupler and optical fiber for optical fiber coupler |
May 13, 2003 |
| In a single mode optical fiber employed in an optical fiber coupler, letting r be the radial distance from the optical axis center, .DELTA.n(r) be the relative refractive index difference at the position r within a core portion with reference to the refractive index of a cladding portion |
| 6563984 |
Long-period grating device |
May 13, 2003 |
| The present invention relates to a long-period grating device which eliminates only a desirable wavelength of core-mode light in a wavelength band in use from 1525 nm to 1610 nm. The long-period grating device according to the present invention comprises an optical fiber provided wit |
| 6538806 |
Optical fiber for optical amplifier and fiber optic amplifier |
March 25, 2003 |
| An optical fiber is for optical amplification used for 1.58 .mu.m band signal light amplification, at least a core region thereof being doped with Er. At least a part of the core region is made of silica glass co-doped with Ge and Al together with Er. The Er average atomic concentrat |
| 6535677 |
Dispersion-managed optical fiber, method of manufacturing the same, optical communication system |
March 18, 2003 |
| The present invention relates to a dispersion-managed optical fiber which can be manufactured easily and has a structure which enables the easy connection thereof with other optical fiber and the like. The dispersion-managed optical fiber is a silica-based optical fiber ensuring its |
| 6522810 |
Optical loss filter |
February 18, 2003 |
| The optical loss filter according to the present invention is configured such that a first long-period grating and a second long-period grating are formed in cascade on a unitary optical fiber having a core region and a cladding region. A coating layer surrounding a part of the cladding |
| 6504962 |
Method for determining an aging condition for an optical waveguide grating and temperature senso |
January 7, 2003 |
| The present invention provides a method for determining a condition of aging for an optical waveguide grating. In this method, the aged deterioration,curve of the optical waveguide grating is set as a forms of C.multidot.t.sup.-.alpha., t represents time, and .alpha. and C represent |
| 6501892 |
Dispersion-compensating fiber |
December 31, 2002 |
| The dispersion-compensating fiber according to the present invention is an optical fiber having a structure which, when constituting an optical transmission line together with a dispersion-shifted fiber, whose zero-dispersion wavelength is in a 1.5-.mu.m wavelength band, for guiding |
| 6490078 |
Optical fiber for optical amplifier, optical fiber amplifier and optical fiber laser |
December 3, 2002 |
| The present invention relates to an OFA having a high signal gain, easily manufactured, having a high mechanical strength, having a small splice loss with respect to other optical fibers, and rarely encountering the occurrence of noise at a signal wavelength. The OFA according to the |
| 6487340 |
Optical fiber grating element, production method, and optical fiber filter |
November 26, 2002 |
| The present invention relates to an optical fiber grating element having structure enabling more precise design and fabrication, a production method thereof, and an optical fiber filter including the same. The optical fiber grating element according to the present invention comprises |
| 6400878 |
Optical fiber and method of making the same |
June 4, 2002 |
| An optical fiber preform 2 having a viscosity ratio R.eta.=.eta..sub.0 /.eta..sub.t of 2.5 or less between the core average viscosity .eta..sub.0 and the total average viscosity .eta..sub.t is prepared, and is drawn by a drawing furnace 11 so as to yield an optical fiber 3, which is then |
| 6347174 |
Non-linear optical fiber, optical fiber coil, and wavelength converter |
February 12, 2002 |
| The present invention relates to a nonlinear optical fiber which can generate a nonlinear optical phenomenon with high efficiency, an optical fiber coil wound with the nonlinear optical fiber, and a wavelength converter equipped with the nonlinear optical fiber. In particular, the no |
| 6335995 |
Dispersion-shifted fiber |
January 1, 2002 |
| The present invention aims to provide a dispersion-shifted fiber which can effectively restrain nonlinear optical effects from occurring and has a configuration suitable for long-haul light transmission. The dispersion-shifted fiber has, as various characteristics at a wavelength of |
| 6327412 |
Optical fiber, light-emitting module, and optical fiber amplifier |
December 4, 2001 |
| An optical fiber amplifier comprises an amplifying optical fiber 60 for optically amplifying signal light according to pumping light incident thereon, a semiconductor light-emitting device 10 for emitting the pumping light; a light-collecting optical system 30 for collecting the pumping |
| 6292607 |
Method for determining an aging condition for an optical waveguide grating and temperature senso |
September 18, 2001 |
| The present invention provides a method for determining a condition of aging for an optical waveguide grating. In this method, the aged deterioration curve of the optical waveguide grating is set as a form of C.multidot.t.sup.-.alpha., where t represents time, and .alpha. and C repre |
| 6144784 |
Optical input/output module and light-reflecting device |
November 7, 2000 |
| The present invention relates to an optical I/O module and light-reflecting device comprising a structure excellent in expandability having a high degree of freedom in designing. The optical I/O module according to the present invention comprises a directional coupler having, at least, i |
| 6137931 |
Method for determining a condition of aging for optical fiber grating |
October 24, 2000 |
| The present invention provides a method for determining a condition of aging for an optical fiber grating. This method comprises a step of setting the aged deterioration curve of the optical fiber grating as a form proportional to t.sup.-n, where t represents time, and n represents a |
| 6116055 |
Method of making synthetic silica glass |
September 12, 2000 |
| Disclosed is a synthetic silica-glass fabricating method in which the doping of chlorine into silica glass made by using a flame hydrolysis or thermal oxidation is increased. The process comprises the steps of producing a porous deposit of silica-glass particles through treatment of |
| 6072929 |
Dispersion-shifted fiber |
June 6, 2000 |
| The present invention aims to provide a dispersion-shifted fiber which can effectively restrain nonlinear optical effects from occurring and has a configuration suitable for long-haul light transmission. The dispersion-shifted fiber has, as various characteristics at a wavelength of |
| 5895515 |
Increasing a fluorine compound flow rate during a VAD process |
April 20, 1999 |
| In a soot-deposition container, raw material gas and at the tip of a starting glass rod, combustion gas, and carrier gas are supplied to a core-depositing burner and raw material gas, combustion gas, carrier gas, and gas for doping of fluorine are supplied to a cladding-depositing bu |
| 5763081 |
Glass body for optical fiber method of selecting the same optical fiber and method of making the |
June 9, 1998 |
| A glass body for optical fiber containing GeO.sub.2 --SiO.sub.2 glass in a core portion thereof, in which the GeO.sub.2 --SiO.sub.2 glass has an absorbance at 5.16 eV of at least 1/mm but not higher than 2.5/mm or in which concentration of Ge.sup.2+ contained in the GeO.sub.2 --SiO.sub. |
| 5732178 |
Single-mode optical fiber |
March 24, 1998 |
| This invention relates to a dispersion-shifted fiber containing silica glass as the major component and in which the zero-dispersion wavelength is set to fall within a range of 1,560 nm to 1,580 nm and the mode field diameter with respect to light having a predetermined wavelength is set |
| 5696860 |
Optical device module and method for manufacturing the same |
December 9, 1997 |
| An optical device module comprises a module body including an optical device, a first fiber connector holding a first optical fiber, coupled to one end of the optical device, and a second fiber connector holding a second optical fiber, coupled to the other end of the optical device; and |
| 5673345 |
Package with optical waveguide module mounted therein |
September 30, 1997 |
| The present invention relates to a package in which an optical waveguide module is mounted, at least having such structure as to reduce influence of expansion or contraction (thermal stress) of a metal housing, caused with a temperature change of the external environment and applied on |
| 5660611 |
Method for producing glass thin film |
August 26, 1997 |
| A method for producing an oxide glass thin film is provided, in which volatilization of additives in a porous film from which the thin film is formed is effectively suppressed, and which the oxide glass film has a desired arrangement of refractive index with a low optical loss. According |
| 5625730 |
Optical waveguide module having waveguide substrate made of predetermined material and ferrule m |
April 29, 1997 |
| This invention relates to an optical waveguide module having stable temperature characteristics and moist heat characteristics even in a severe environment. This optical waveguide module includes a waveguide component having an optical waveguide on a waveguide substrate made of silic |
| 5597398 |
Process for producing glass preform for optical fiber |
January 28, 1997 |
| A process for producing a porous glass preform for optical fiber by depositing fine glass particles on an outer surface of a glass material while moving the glass material, including the steps of: preheating a portion of the glass material for not less than 5 minutes to clean the por |
| 5556442 |
Method for fabricating an optical waveguide |
September 17, 1996 |
| A process for forming film structure using Flame Hydrolysis Deposition (FHD) in which (1) glass soot is deposited on a substrate via FHD to form a first porous vitreous layer having a first bulk density, (2) a second porous vitreous layer having a second bulk density that is larger than |
| 5551966 |
Optical waveguide and method of fabricating the same |
September 3, 1996 |
| In the method for forming an optical waveguide according to this invention, an optical waveguide comprising a core of quartz as a main component, and a cladding layers surrounding the core is formed by deposition of glass fine particles by flame hydrolysis deposition and vitrifying the g |
| 5513290 |
Coupling structure of optical fibers and optical waveguides |
April 30, 1996 |
| There is disclosed a coupling structure of optical fibers and optical waveguides, comprising optical fibers; an optical fiber arranging connector having a first and second members, the optical fibers being sandwiched by the first and second members to be fixed in the optical fiber ar |
| 5503650 |
Method for producing a glass thin film with controlloing an oxide vapor of an additive |
April 2, 1996 |
| A method of producing an oxide glass thin film includes a process to obtain a transparent glass film, in which volatilization of additives in a porous film deposited is effectively suppressed and which can provide an oxide glass thin film having a desired arrangement of refractive index |
