Abstract: A single mode optical fiber including a germania doped silica central core region having outer radius r1 and refractive index ?1, a maximum refractive index ?1max, and 0.32%??1max?0.45%, and a core alpha profile (Core?). In various embodiments, the optical fiber also contains a cladding region including: (i) a second inner cladding region or ring region surrounding the first inner cladding region; or (ii) an inner cladding region or pedestal region surrounding the germania doped silica central core region. The corresponding resultant optical fibers exhibit a 22 m cable cutoff less than or equal to 1260 nm, a macrobending loss at 1550 nm of ?0.75 dB/turn on a 20 mm diameter mandrel, a zero dispersion wavelength, ?0, of 1300 nm??0?1324 nm, and a mode field diameter at 1310 nm of 8.2 microns?MDF1310nm?9.6 microns.

Abstract: An optical fiber comprising: (i) a chlorine doped silica based core comprising a core alpha (?)>10, and maximum refractive index delta ?1max % and Cl concentration >1 wt %; (ii) a cladding surrounding the core, the cladding comprising: (a) an inner cladding region adjacent to and in contact with the core and having a refractive index delta ?2 and a minimum refractive index delta ?2min such that ?2min<?1max, the inner cladding region comprising fluorine doped silica and the refractive index delta ?2 with region that decreases with radial position, and (b) an outer cladding region surrounding the inner cladding region and having refractive index delta ?3, such that ?2min<?3. The fiber has mode field diameter MFD at 1310 nm of ?9 microns, a cable cutoff of ?1260 nm, zero dispersion wavelength of 1300 nm?zero dispersion wavelength ?1324 nm and bend loss at 1550 nm for a 20 mm mandrel of less than 0.5 dB/turn.

Abstract: Optical fibers having a mode field diameter at 1310 nm of at least 8.8 ?m, wire mesh covered drum microbending losses at 1550 nm less than 0.03 dB/km, and a 2 m cutoff wavelength less than 1320 nm. The fibers may include a central core region, an inner cladding region, an outer cladding region, a primary coating with an in situ modulus less than 0.20 MPa and glass transition temperature less than ?35° C., and a secondary coating with an in situ modulus greater than 1500 MPa. The fibers may further include a depressed index cladding region. The relative refractive index of the central core region may be greater than the relative refractive index of the outer cladding region may be greater than the relative refractive index of the inner cladding region. The fibers may be produced at draw speeds of 30 m/s or greater.

Abstract: Disclosed herein are optical waveguide fibers comprising: (I) a core comprising an outer radius r1, a maximum refractive index delta percent ?1max and core alpha, ?, of larger than 5; and (II) a cladding surrounding the core, the cladding comprising: (i) an inner cladding region having outer radius r2 and refractive index delta percent ?2, wherein ?1max>?2; (ii) a trench region surrounding the inner cladding region, the trench region having an outer radius, r3 where r3?10 microns and refractive index delta percent ?3; and (iii) an outer cladding region having chlorine concentration of ?1.2 wt. % surrounding the trench region and comprising refractive index delta percent ?4, wherein ?1max>?4 and ?2>?3, and ?4>?3 and wherein the difference between ?4 and ?3 is ?0.12 percent.

Abstract: A single-mode fiber with low loss and low bend loss is disclosed. The fiber is single mode and has a central core (10), an inner cladding (20) and an outer cladding (30). The central core (10) has a radius r1 and relative refractive index with a maximum value of ?1max and a core alpha greater than 1 and less than 10, and a Ge02 dopant concentration of greater than 1 wt. % and less than or equal to 5 wt. %. The inner cladding (20) has an outer radius r2>9 micrometers and a relative refractive index ?2 where ?2 is less then ?0.15%. The outer cladding (30) has a refractive index ?3, wherein ?1>?3>?2. The difference ?3??2>0.005%. The inner cladding includes fluorine having a concentration of greater than or equal to 0.5 wt. % and the outer cladding is updoped with respect to inner cladding.

Abstract: An optical fiber with low attenuation and methods of making same are disclosed. The optical fiber has a core, an inner cladding surround the core, and an outer cladding surrounding the inner cladding. The outer cladding is chlorine-doped such that the relative refractive index varies as a function of radius. The radially varying relative refractive index profile of the outer cladding reduces excess stress in the core and inner cladding, which helps lower fiber attenuation while also reducing macrobend and microbend loss. A process of fabricating the optical fiber includes doping an overclad soot layer of a soot preform with chlorine and then removing a portion of the chlorine dopant from an outermost region of the overclad soot layer. The soot preform with the modified chlorine dopant profile is then sintered to form a glass preform, which can then be used for drawing the optical fiber.

Abstract: Disclosed herein are optical waveguide fibers comprising: (I) a core comprising an outer radius r1, a maximum refractive index delta percent ?1 max and core alpha, ?, of larger than 5; and (II) a cladding surrounding the core, the cladding comprising: (i) an inner cladding region having outer radius r2 and refractive index delta percent ?2, wherein ?1max>?2; (ii) a trench region surrounding the inner cladding region, the trench region having an outer radius, r3 where r3?10 microns and refractive index delta percent ?3; and (iii) an outer cladding region having chlorine concentration of ?1.2 wt. % surrounding the trench region and comprising refractive index delta percent ?t, wherein ?1max>?4 and ?2>?3, and ?4>?3 and wherein the difference between ?4 and ?3 is ?0.12 percent.

Abstract: An optical fiber comprising: (i) a chlorine doped silica based core comprising a core alpha (?)>10, and maximum refractive index delta ?1max % and Cl concentration >1 wt %; (ii) a cladding surrounding the core, the cladding comprising: (a) an inner cladding region adjacent to and in contact with the core and having a refractive index delta ?2 and a minimum refractive index delta ?2min such that ?2min<?1max, the inner cladding region comprising fluorine doped silica and the refractive index delta ?2 with region that decreases with radial position, and (b) an outer cladding region surrounding the inner cladding region and having refractive index delta ?3, such that ?2min<?3. The fiber has mode field diameter MFD at 1310 nm of ?9 microns, a cable cutoff of ?1260 nm, zero dispersion wavelength of 1300 nm?zero dispersion wavelength ?1324 nm and bend loss at 1550 nm for a 20 mm mandrel of less than 0.5 dB/turn.

Abstract: Single mode optical fibers with a chlorine doped core and a cladding having a fluorine doped trench region are disclosed. The optical fiber includes a chlorine doped silica core having a core alpha ??10, a core radius r1 and maximum refractive index delta ?1max % and a Cl concentration?0.9 wt %. The optical fiber also has a cladding surrounding the core, the cladding having an inner and an outer cladding. The inner cladding has first and second cladding regions. The optical fiber has mode field diameter at 1310 nm of larger than 9 microns, a cable cutoff wavelength of ?1260 nm, a zero dispersion wavelength ?0, where 1300 nm??0?1324 nm, and bend loss at 1550 nm for a 20 mm mandrel of less than 0.5 dB/turn.

Abstract: An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta ?1MAX; and LP01 effective area >100 ?m2 at 1550 nm; (ii) an inner cladding surrounding the core and having a minimum relative refractive index delta ?2MIN and ?coreMAX>?2MIN; (iii) an outer cladding surrounding the inner cladding and comprising a first outer cladding portion with a maximum refractive index ?3A such that ?3A>?2MIN; and another outer cladding portion surrounding the first outer cladding portion with a maximum refractive index delta ?3B wherein with a maximum refractive index delta ?3B wherein ?3B>?3A, said another portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ?C wherein ?C>?3B.

Abstract: An optical fiber with large effective area, low bending loss and low attenuation. The optical fiber includes a core, an inner cladding region, and an outer cladding region. The core region includes a spatially uniform updopant to minimize low Rayleigh scattering and a relative refractive index and radius configured to provide large effective area. The inner cladding region features a large trench volume to minimize bending loss. The core may be doped with Cl and the inner cladding region may be doped with F.

Abstract: Disclosed herein are optical waveguide fibers comprising: (I) a core comprising an outer radius r1, a maximum refractive index delta percent ?1 max and core alpha, ?, of larger than 5; and (II) a cladding surrounding the core, the cladding comprising: (i) an inner cladding region having outer radius r2 and refractive index delta percent ?2, wherein ?1max>?2; (ii) a trench region surrounding the inner cladding region, the trench region having an outer radius, r3 where r3?10 microns and refractive index delta percent ?3; and (iii) an outer cladding region having chlorine concentration of ?1.2 wt. % surrounding the trench region and comprising refractive index delta percent ?4, wherein ?1max>?4 and ?2>?3, and ?4>?3 and wherein the difference between ?4 and ?3 is ?0.12 percent.

Abstract: A quasi-single-mode optical fiber with a large effective area is disclosed. The quasi-single-mode fiber has a core with a radius greater than 5 ?m, and a cladding section configured to support a fundamental mode and a higher-order mode. The fundamental mode has an effective area greater than 170 ?m2 and an attenuation of no greater than 0.17 dB/km at a wavelength of 1530 nm. The higher-order mode has an attenuation of at least 1.0 dB/km at the wavelength of 1530 nm. The quasi-single-mode optical fiber has a bending loss of less than 0.02 dB/turn for a bend diameter of 60 mm for a wavelength of 1625 nm.

Abstract: An optical fiber including a multimode core having a radius, R1, and a maximum relative refractive index, ?1MAX, at a wavelength ?0, an inner clad layer surrounding the core and having a radial thickness, T2, and a minimum relative refractive index, ?2MIN, of about 0.0% at a wavelength of ?0, an intermediate clad layer surrounding the inner clad layer and having a radial thickness, T3, and a maximum relative refractive index ?3MAX and an outer clad layer surrounding the inner clad layer and having a radial thickness, T4, and a maximum relative refractive index, ?4MIN, at a wavelength of ?0. The optical fiber satisfies the following relationship: ?1MAX>?3MAX>?2MIN, and the optical fiber exhibits an overfilled bandwidth of greater than or equal to about 1.5 GHz-km at ?0.

Abstract: Disclosed herein are optical waveguide fibers comprising: (I) a core comprising an outer radius r1, a maximum refractive index delta percent ?1 max and core alpha, ?, of larger than 5; and (II) a cladding surrounding the core, the cladding comprising: (i) an inner cladding region having outer radius r2 and refractive index delta percent ?2, wherein ?1max>?2; (ii) a trench region surrounding the inner cladding region, the trench region having an outer radius, r3 where r3?10 microns and refractive index delta percent ?3; and (iii) an outer cladding region having chlorine concentration of ?1.2 wt. % surrounding the trench region and comprising refractive index delta percent ?4, wherein ?1max>?4 and ?2>?3, and ?4>?3 and wherein the difference between ?4 and ?3 is ?0.12 percent.

Abstract: An optical fiber including a multimode core having a radius, R1, and a maximum relative refractive index, ?1MAX, at a wavelength ?0, an inner clad layer surrounding the core and having a radial thickness, T2, and a minimum relative refractive index, ?2MIN, of about 0.0% at a wavelength of ?0, an intermediate clad layer surrounding the inner clad layer and having a radial thickness, T3, and a maximum relative refractive index ?3MAX and an outer clad layer surrounding the inner clad layer and having a radial thickness, T4, and a maximum relative refractive index, ?4MIN, at a wavelength of ?0. The optical fiber satisfies the following relationship: ?1MAX>?3MAX>?2MIN, and the optical fiber exhibits an overfilled bandwidth of greater than or equal to about 1.5 GHz-km at ?0.

Abstract: One embodiment of the disclosure relates to a method of making an optical fiber comprising the steps of: (i) exposing a silica based preform with at least one porous glass region having soot density of ? to a gas mixture comprising SiCl4 having SiCl4 mole fraction ySiCl4 at a doping temperature Tdop such that parameter X is larger than 0.03 to form the chlorine treated preform, wherein X = 1 1 + [ ( ? ? s - ? ) ? 0.209748 ? ? T dop ? Exp ? [ - 5435.33 / T dop ] y SiCl ? ? 4 3 / 4 ] and ?s is the density of the fully densified soot layer; and (ii) exposing the chlorine treated preform to temperatures above 1400° C. to completely sinter the preform to produce sintered optical fiber preform with a chlorine doped region; and (iii) drawing an optical fiber from the sintered optical preform.

Abstract: An optical fiber with large effective area, low bending loss and low attenuation. The optical fiber includes a core, an inner cladding region, and an outer cladding region. The core region includes a spatially uniform updopant to minimize low Rayleigh scattering and a relative refractive index and radius configured to provide large effective area. The inner cladding region features a large trench volume to minimize bending loss. The core may be doped with Cl and the inner cladding region may be doped with F.

Abstract: An optical fiber with large effective area, low bending loss and low attenuation. The optical fiber includes a core, an inner cladding region, and an outer cladding region. The core region includes a spatially uniform updopant to minimize low Rayleigh scattering and a relative refractive index and radius configured to provide large effective area. The inner cladding region features a large trench volume to minimize bending loss. The core may be doped with Cl and the inner cladding region may be doped with F.

Abstract: An optical fiber with large effective area, low bending loss and low attenuation. The optical fiber includes a core, an inner cladding region, and an outer cladding region. The core region includes a spatially uniform updopant to minimize low Rayleigh scattering and a relative refractive index and radius configured to provide large effective area. The inner cladding region features a large trench volume to minimize bending loss. The core may be doped with Cl and the inner cladding region may be doped with F.