| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Single polarization and polarization maintaining optical fibers and system utilizing same | US11288870 | 2005-11-28 | US07200309B2 | 2007-04-03 | George Edward Berkey; Xin Chen; Ming-Jun Li; Daniel Aloysius Nolan; William Allen Wood; Joohyun Koh |
| An optical fiber, comprising: a central core having a maximum dimension (A) greater than a minimum dimension (B) and a substantially elliptical shape, the fiber having at least one air hole positioned each opposite side of the central core wherein the optical fiber exhibits (i) single polarization propagation within a single polarization band and (ii) polarization maintaining property, such that the fiber beat length normalized at 1550 nm is less than 10 mm; and the polarization maintaining band is situated within wavelengths which are (a) adjacent to and below the single polarization band; and (b) above the higher order mode cutoff wavelength. | ||||||
| 162 | Single polarization optical fiber laser and amplifier | US10696928 | 2003-10-30 | US07120340B2 | 2006-10-10 | George E. Berkey; Ming-Jun Li; Daniel A. Nolan; Donnell T. Walton; Luis A. Zenteno |
| An optically active linear single polarization device includes a linearly birefringent and linearly dichroic optical waveguide (30) for propagating light and having single polarization wavelength range (48). A plurality of active dopants are disposed in a portion (34) of the linearly birefringent and linearly dichroic optical waveguide (30) for providing operation of the waveguide in an operating wavelength range (650) for overlapping the single polarization wavelength range (48). | ||||||
| 163 | OPTICAL FIBER AND OPTICAL FIBER COUPLER, ERBIUM-DOPED OPTICAL FIBER AMPLIFIER, AND OPTICAL WAVEGUIDE USING THE SAME | US11276165 | 2006-02-16 | US20060140565A1 | 2006-06-29 | Masashi Ikeda; Masakazu Nakayama; Kuniharu Himeno; Masaaki Ohtsuka; Masakazu Oohashi; Daiichiro Tanaka |
| An optical fiber that includes a core containing a first concentration of germanium, an inner cladding arranged on the core, the inner cladding containing a second concentration of germanium and having a first diffusion coefficient, and an outer cladding arranged on the inner cladding, the outer cladding having a second diffusion coefficient, where the first diffusion coefficient is larger than the second diffusion coefficient, and where the first concentration of germanium is about 200% or more of the second concentration of germanium. An optical fiber constructed in this manner can be spliced with an optical fiber having a different MFD, such as a single-mode optical fiber or an erbium-doped optical fiber, with low splice loss and a sufficient splicing strength. | ||||||
| 164 | Single polarization and polarization maintaining optical fibers and system utilizing same | US11288870 | 2005-11-28 | US20060083471A1 | 2006-04-20 | George Berkey; Xin Chen; Ming-Jun Li; Daniel Nolan; William Wood; Joohyun Koh |
| An optical fiber, comprising: a central core having a maximum dimension (A) greater than a minimum dimension (B) and a substantially elliptical shape, the fiber having at least one air hole positioned each opposite side of the central core wherein the optical fiber exhibits (i) single polarization propagation within a single polarization band and (ii) polarization maintaining property, such that the fiber beat length normalized at 1550 nm is less than 10 mm; and the polarization maintaining band is situated within wavelengths which are (a) adjacent to and below the single polarization band; and (b) above the higher order mode cutoff wavelength. | ||||||
| 165 | Method for producing an optical fibre telecommunications cable with reduced polarization mode dispersion | US10451998 | 2001-12-14 | US07016576B2 | 2006-03-21 | Franco Cocchini; Andrea Mazzotti; Alfonso Cavallaro; Francesco Di Nola |
| An optical cable for telecommunications having an optical core and a plurality of protecting and reinforcing elements or avers placed around the optical core. The optical core has a central reinforcing element, a polymer layer, a plurality of optical fibers incorporated in the polymer layer and a thin sheath which covers the polymer layer. The optical fibers have an alternating spin about their own axes with a maximum value of at least 4 twists per meter, and a core having a mean ellipticity in the range of 0.25 to 0.55, in such a way that the effects of birefringence of the fibers caused by the cabling process are significantly reduced. | ||||||
| 166 | Optical fiber and method for making such fiber | US11056870 | 2005-02-11 | US20050271347A1 | 2005-12-08 | Ronald Kimball; Robert Knowlton; Joseph McCarthy; Ji Wang; Donnell Walton; Luis Zenteno |
| According to one example of the invention an optical fiber comprises: (i) silica based, rare earth doped core having a first index of refraction n1; (ii) at least one silica based cladding surrounding the core and having a second index of refraction n2, such that n1>n2; wherein at least one of the core or cladding is doped with Al2O3, such that the ratio of max wt % to min wt % of Al2O3 concentration is less than 2:1 | ||||||
| 167 | Nonlinear optical fibre method of its production and use thereof | US10507723 | 2003-03-14 | US20050238307A1 | 2005-10-27 | Kim Hansen; Jacob Folkenberg |
| An optical fibre having a longitudinal direction and a cross-section perpendicular thereto, said fibre in a cross-section comprising: (a) a core region (11) having a refractive index profile with a highest refractive index nc, and (b) a cladding region comprising cladding features (10) having a centre-to-centre spacing, Λ, and a diameter, d, of around 0.4Λ or larger, wherein nc, Λ and d are adapted such that the fibre exhibits zero dispersion wavelength of a fundamental mode in the wavelength range from 1530 nm to 1640 nm; a method of producing such a fibre; and use of such an optical fibre in e.g. an optical communication system, in an optical fibre laser, in an optical fibre amplifier, in an optical fibre Raman amplifier, in a dispersion compensator, in a dispersion and/or dispersion slope compensator. | ||||||
| 168 | Photonic crystal fibres | US09890793 | 2000-02-18 | US06954574B1 | 2005-10-11 | Philip St. John Russell; Timothy Adam Birks; Jonathan Cave Knight |
| A photonic crystal fiber comprising a bulk material having an arrangement of longitudinal holes (130, 140) and a guiding core (135), wherein the fiber has at-most-two-fold rotational symmetry about a longitudinal axis and as a result of that lack of symmetry, the fiber is birefringent. | ||||||
| 169 | Optical waveguide fibre | US10362452 | 2003-02-25 | US20030190129A1 | 2003-10-09 | Ian Bassett; Simon Fleming; Mark Sceats; Martijn Van Eijkelenborg |
| An optical fibre (1) having at least one longitudinally extending light guiding core region (11), a longitudinally extending core-surrounding region (12), and a plurality of light confining elements (15, 16, 17, 18), such as, for example, channel-like holes, located within the core-surrounding region (12). The light confining elements (15, 16, 17, 18) extend in the longitudinal direction of the core region and are located geometrically in zones that surround the core region. The aggregate cross-sectional area defined by the light confining elements within the respective zones increases with increasing radial distance of the zones from the core region. A preform for use in manufacture of the optical fibre is also defined. | ||||||
| 170 | Cladding member for optical fibers and optical fibers formed with the cladding member | US09541040 | 2000-03-31 | US06483973B1 | 2002-11-19 | David J Mazzarese; John D Prohaska; Malcolm Smith; Kanishka Tankala |
| The present invention provides an optical fiber for use in fiber lasers and amplifiers wherein the optical fiber has a core member surrounded by a cladding member for receiving pump energy and transferring the pump energy to the core member. The optical fiber also has an outer layer surrounding the cladding member. The cladding member has a circular exterior periphery and a predetermined refractive index (nc). The cladding member has an index modified region that directs light to the core member. The index modified region has a stress field portion with a predetermined refractive index (ns). The difference between the refractive index of the cladding member and that of the stress field portion (nc−ns) is within such a range that the stress field portion does not affect the polarization properties of the light traveling in the core member. Preferably, the difference between the refractive index of the cladding member and that of the stress field portion (nc−ns) is less than 10−4, and more preferably 10−5. | ||||||
| 171 | Method of producing an elliptic core optical fiber, and a processed preform used for producing elliptic core optical fiber | US10097867 | 2002-03-15 | US20020162361A1 | 2002-11-07 | Shuji Okagawa; Hideo Kato; Kenji Yagi |
| Disclosed is a method of producing an elliptic core optical fiber, in which a original preform having a circular core disposed at the center of a circular clad is processed to flatten on its periphery to form a processed preform that is then drawn with heating into an elliptic core optical fiber. According to the invention, the form of the processed preform used for producing an elliptic core optical fiber with desired specific dimensions can be designed using pre-obtained correlations based on the dimensions of the elliptic core optical fiber. If the processed preform designed like this is drawn with heating, an elliptic core optical fiber with desired specific dimensions can be reliably and easily produced. | ||||||
| 172 | Apparatus and method for manufacturing fiber gratings | US09925590 | 2001-08-09 | US20020071881A1 | 2002-06-13 | Victor Il?apos;ich Kopp; Azriel Zelig Genack; Richard Mead |
| In accordance with the apparatus and method of the present invention an optical fiber is heated and twisted to produce a periodic modulation of the dielectric constant along the fiber axis. This structure can be used in any application that utilizes Bragg grating optical fibers. A preform is drawn through a heater and the resulting optical fiber is twisted about its longitudinal axis. The refractive index modulation in the optical fiber arises from birefringence induced by stress in the optical fiber that is twisted after being subjected to an uneven heat distribution during the drawing process. The refractive index is modulated by drawing and twisting the optical fiber from a specially constructed preform which is non-cylindrically symmetrical. | ||||||
| 173 | Optical fiber | US09306498 | 1999-05-06 | US06404966B1 | 2002-06-11 | Satoki Kawanishi; Katsunari Okamoto |
| An optical fiber including a core having an area of about several times an optical wavelength and composed of a hollow hole, and a cladding having a diffraction grating which is arranged at least in a peripheral area adjacent to the core and has a grating period equal to ½ the optical wavelength. | ||||||
| 174 | Method of making polarization-maintaining optical fibers | US08975338 | 1997-11-20 | US06209356B1 | 2001-04-03 | Giuseppe Cocito; Giorgio Grego |
| To manufacture polarization-maintaining optical fibers, a fiber is directly and continuously irradiated with at least one beam of UV radiation during drawing and before application of external coatings. | ||||||
| 175 | Grooved optical fiber for use with an electrode and a method for making same | US454779 | 1999-12-03 | US6134356A | 2000-10-17 | Thomas D. Monte |
| An optical fiber which modifies the optical signals propagated through the fiber and has refractive properties which change in response to electromagnetic energy. The outer surface of the fiber forms at least one groove extending along a selected length of the fiber for receiving an electrode, which would apply an electrical voltage to the fiber resulting in a change of the refractive properties of the fiber. | ||||||
| 176 | Polarization mode coupled single mode waveguide | US513260 | 1995-08-10 | US5867616A | 1999-02-02 | A. Joseph Antos; Venkata A. Bhagavatula; William J. Cherenak; Dipakbin Q. Chowdhury; Daniel A. Nolan |
| A single mode optical waveguide having reduced polarization mode dispersion and a method for making such a waveguide is disclosed. Perturbations are introduced into the waveguide core to couple power between the two polarization modes. A model calculation shows that the perturbation length may be of the order of the correlation length. The inventive waveguide is robust in that polarization mode dispersion is reduced even if perturbations are impressed on the fiber after manufacture. | ||||||
| 177 | Partially detached core optical waveguide | US50509 | 1993-04-20 | US5307436A | 1994-04-26 | George E. Berkey |
| An optical waveguide fiber is made substantially bend less resistant by providing a core member partially detached from a cladding member. A core rod is suspended within a cladding preform. The assembly is heated and drawn into a waveguide fiber. The partial detachment is achieved by proper choice of preform dimensions and drawing parameters. Alternatively, a positive pressure may be applied to the preform interior to produce the partial detachment. The partial detachment of the core member from the cladding substantially isolates the core member from external forces, thereby making the waveguide substantially bend resistant. The preferred detachment fraction is more than 95% of the core member periphery. Essentially any waveguide which can be fabricated using a core rod inserted in a cladding tube, can be made to have a partially detached core member. The waveguide types to which the invention applies include single mode, multimode and polarization retaining single mode. To obtain further core member isolation, a waveguide may be fabricated which has a first cladding partially attached to a second cladding and the core member partially attached to the second cladding. Making bend resistance intrinsic to the waveguide, allows greater freedom in choice and application of waveguide coatings and cable designs. | ||||||
| 178 | Divalent transition-metal-aluminosilicate hydrocarbon conversion catalysts having mazzite-like structures, ECR-23-D (C-2494) | US746264 | 1991-08-15 | US5185137A | 1993-02-09 | David E. W. Vaughan; Karl G. Strohmaier |
| This invention relates to novel zeolitic compositions having one or more transition metals as well as aluminum and silicon in the framework tetrahedral positions. The composition has a mazzite-like structure. The invention also involves a process of preparation in which at least one divalent transition metal is directly synthesized into the product. | ||||||
| 179 | Process and device for producing a hollow optical fiber | US620045 | 1990-11-30 | US5167684A | 1992-12-01 | Marc Turpin; Jean-Pierre Le Pesant |
| A process for producing an optical fiber comprising the following stages: a stage of production of a preform having an axis of symmetry and their ends and comprising an optical core as well as at least one cylindrical recess whose axis is parallel to the axis of symmetry of the preform; a drawing stage at a temperature making possible the softening of the drawn part of the preform to obtain a hollow optical fiber, characterized in that it comprises, after the preceding stage of production of the preform: a stage of attachment in a tight manner, to one end of the preform, of a hollow chamber whose cavity communicates with the recess of the preform. The cavity also communicates with a pneumatic regulation device. The drawing stage comprises a pneumatic regulation of the gas contained in the cavity and in the recess with the help of the pneumatic regulation device. | ||||||
| 180 | Method of making polarization retaining fiber with an elliptical core, with collapsed apertures | US728276 | 1991-07-11 | US5149349A | 1992-09-22 | George E. Berkey; Robert M. Hawk; Steven H. Tarcza |
| Disclosed is a method of making a polarization retaining single-mode optical fiber. There is initially formed a draw blank having diametrically opposed longitudinal apertures in the cladding glass parallel to the core glass region. The draw blank is drawn into a fiber under such conditions that the apertures close as the fiber is being drawn. The flow of surrounding glass, including the core glass region, toward the collapsing apertures, causes the core to assume an elliptical shape. The apertures are of such cross-sectional area and spacing from the core that the core develops the desired aspect ratio. | ||||||
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