Abstract:
An optical fiber, comprising: (i) a rate earth doped silica based elongated core with a first refractive index (n 1 ) with an aspect ratio of 1:5 to 1; (ii) a silica based moat abutting and at least substantially surrounding the core, the moat having a refractive index n 2 , wherein n 2 1 ; (iii) a silica based inner cladding surrounding the moat, the inner cladding having a third refractive index (n 3 ), wherein n 1 >n 3 , and n 3 >n 2 , (iv) a silica based outer cladding surrounding said inner cladding, the outer cladding having a fourth refractive index (n 4 ), such that n 4 3 ; the optical fiber exhibits single polarization at the operating wavelenght band.
Abstract translation:一种光纤,包括:(i)具有1:5至1的纵横比的第一折射率(n <1> 1)的速率掺杂掺杂硅石的细长芯; (ii)邻接并且至少基本上围绕所述芯的基于二氧化硅的护城河,所述护城河具有折射率n 2 N 2,其中n 2 ; (iii)围绕所述护城河的基于二氧化硅的内包层,所述内包层具有第三折射率(n 3/3),其中n 1 <3> n 3 < (iv)围绕所述内包层的基于二氧化硅的外包层,所述外包层具有第四折射率(n 3) 4 SUB>),使得n 4 N 3 N 3; 光纤在工作波长带显示出单极化。
Abstract:
An optical fiber that includes a central core (34) having a maximum dimension (A) greater than a minimum dimension (B), preferably with an aspect ratio greater than 1.5, the fiber having at least one air hole (24, 26) positioned on opposite sides of the central core and extending along the fiber's length wherein the fiber supports a single polarization mode within an operating wavelength band. The fiber may be coupled to optical components in systems to provide single polarization in the band. A method for manufacturing the fiber is also provided.
Abstract:
An optical fiber is disclosed herein comprising a core having an alpha parameter in the range of approximately 2 to approximately 8, a maximum index percent difference between the core and a cladding in the range of approximately 0.3% to approximately 0.5% and a core diameter in the range of approximately 6.0 to approximately 16.0 µm and a cladding. The optical fiber has a bandwidth of at least approximately 0.6 GHz.km at 850 nm, and is configured for multimode operation at a wavelength less than 1300 nm and single mode operation at a wavelength of at least approximately 1300 nm. The fiber also has significantly reduced intermodal noise. Also disclosed herein is a method of designing such a fiber, a fiber optic system provided such a fiber and a method of operating a fiber optic system with such a fiber.
Abstract:
A dispersion compensating single mode optical waveguide fiber designed to change the wavelength window of operation of a link from 1301 nm to 1550 nm. The dispersion compensating waveguide fiber is characterized by a core glass region refractive index profile comprised of at least three segments (2, 4, 6, 8). The segment (2) on the waveguide center has a positive relative refractive index. At least one segment (4, 8), spaced apart from the waveguide centerline has a negative relative refractive index.
Abstract:
Disclosed is an optical fiber having a silica-based core and a silica-based cladding, the core comprising germania, and oxides of an alkali metal and phosphorous. By appropriately selecting the concentration of alkali metal and phosphorous oxides, fibers exhibiting low attenuation and low hydrogen aged attenuation may be obtained. In a preferred embodiment, the alkali metal oxide is potassium oxide (K 2 O).
Abstract:
An optical fiber (10), comprising: (i) a rare earth doped silica based elongated core (12) with a first refractive index (n1 with an aspect ratio of 1.5 to 10; (ii) a silica based moat (13) abutting and at least substantially surrounding the core, the moat having a refractive index n2, wherein n21; (iii) a silica based inner cladding (14) surrounding the moat, the inner cladding having a third refractive index (n3), wherein n1>n3; and n3>n2; (iv) a silica based outer cladding (16) surrounding said inner cladding, the outer cladding having a fourth refractive index (n4), such that n43; the optical fiber exhibits single polarization at the operating wavelength band.
Abstract:
Disclosed is an optical fiber (20) having a centermost laterally-elongated core (30) having a short dimension (a), a long dimension (b) and a first refractive index (n1), a moat (40) surrounding the central laterally-elongated core, the moat (40) having a second refractive index (n2), an outer dimension (c) and an outer dimension (d), and a cladding (50) surrounding the moat (40), the cladding (50) having a third refractive index (n3), wherein n1>n3>n2, a ratio of b/a is between 1.5 and 5.0, and a ratio of d/a is between 2.0 and 7.0. The fiber supports a single (one and only one) polarization within a Single Polarization Band (SPB). The fiber (20) may be coupled to optical components in apparatus where single polarization properties are desired.
Abstract:
A multimode optical fiber is provided. The fiber includes a graded index glass core having a diameter in the range of 24 microns to 40 microns, and a graded index having an alpha profile with an alpha coefficient less than 2.12 and a maximum relative refractive index in the range between 0.6 percent and 1.9 percent. The optical fiber further includes a cladding surrounding and in contact with the core. The cladding includes a depressed-index annular portion. The fiber has an overfilled bandwidth greater than 2.0 GHz-km at 1310 nm. An optical backplane system is also provided. The optical backplane system includes at least one transceiver, at least one optical connector, and a plurality of multimode optical fibers as defined above coupled to the at least one optical connector.
Abstract:
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).