Abstract: Optical waveguide fiber that is bend resistant and single mode at 1260 nm and at higher wavelengths. The optical fiber includes a core of radius R1 and cladding, the cladding having an annular inner region of radius R2, an annular ring region, and an annular outer region. The annular ring region starts at R2, and the ratio R1/R2 is greater than 0.40.

Abstract: An optical fiber comprising: a glass core extending from a centerline to a radius R1; a glass cladding surrounding and in contact with the core, the cladding comprising: a first annular region extending from R1 to a radius R2, the first annular region comprising a radial width, W2=R2?R1, a second annular region extending from R2 to a radius R3, the second annular region comprising a radial width, W3=R3?R2, and a third annular region extending from R3 to an outermost glass radius R4; wherein (i) the core comprises a maximum relative refractive index, ?1MAX, relative to the third annular region; (ii) wherein the first annular region comprises a radial width W2; and (iii) the second annular region comprises a minimum relative refractive index, ?3MIN, relative to the third annular region wherein ?1MAX>?2MAX>?3MIN, and ?2MIN>?3MIN; and the core and the cladding provide a fiber with cable cutoff less than 1500 nm, dispersion at 1550 nm less than 12 ps/nm/km, effective area at 1550 nm greater than 60 ?m2, a

Abstract: A dispersion compensating optical waveguide fiber that includes a core region surrounded by and in contact with a clad layer, wherein the respective refractive index profiles of the core region and the clad layer can be selected to provide, at a wavelength of 1550 nm, a total dispersion of less than ?25 ps/nm/km and a bend loss of less than 0.25 dB per turn on a 20 mm diameter mandrel. The dispersion compensating optical waveguide fiber can also have an effective area of greater than 25 ?m2. The dispersion compensating optical waveguide fiber may include a cladding layer having randomly dispersed voids situated therein.

Abstract: An optical fiber according to an embodiment of the present invention comprises: a glass core extending from a centerline to a radius R1 wherein R1 is greater than about 5 ?m; a glass cladding surrounding and in contact with the core, the cladding comprising: (i) a first annular region extending from the radius R1 to a radius R2, the first annular region comprising a radial width, W2=R2?R1, (ii) a second annular region extending from the radius R2 to a radius R3, and comprising a radial width, W3=R3?R2, and (iii) a third annular region surrounding the second annular region and extending from the radius R3 to an outermost glass radius R4; wherein the core comprises a maximum relative refractive index, ?1MAX, relative to the third annular region, and wherein ?1MAX is greater than about 0.1% and less than about 0.3%; the first annular region has a refractive index delta ?2(r) is less than about 0.

Abstract: An optical fiber comprising: (i) a glass core (20) extending from a centerline and including a central core region (22) with an alpha value of less than 2, a first annular core region (24) surrounding the central core region (22), and a second annular core region (26) surrounding the first annular core region (24), wherein the second annular core region (26) has a higher maximum relative refractive index percent ?26MAX than that maximum relative refractive index percent ?24MAX of the first annular core region (24); and (ii) a glass cladding (30) surrounding and in contact with the core (20), the cladding comprising: (a) a first annular cladding region (32) extending from a radius R32 to a radius R34, (b) a second annular cladding region (34) extending from the radius R34 to a radius R36, (c) a third annular cladding region (36) surrounding the second annular region (34) and extending from the radius R34 to an outermost glass radius R36; wherein the core (20) comprises a maximum relative refractive index perce

Abstract: Microstructured optical fiber for transmitting optical signals comprised of light, the optical fiber including a core region and a cladding region surrounding the core region, the cladding region including at least one annular region having an index of refraction lower than that of the remainder of the cladding. The optical fiber provides an absolute SBS threshold in dBm greater than about 9.3+10log[(1?e?(0.19)(50)/4.343)/(1?e?(?)(L)/4.343)], wherein L is the length in km and ? is the attenuation in dB/km at 1550 nm, and a fiber cutoff wavelength of less than 1400 nm.

Abstract: An optical fiber comprising: a glass core extending from a centerline to a radius R1; a glass cladding surrounding and in contact with the core, the cladding comprising: a first annular region extending from R1 to a radius R2, the first annular region comprising a radial width, W2=R2?R1, a second annular region extending from R2 to a radius R3, the second annular region comprising a radial width, W3=R3?R2, and a third annular region extending from R3 to an outermost glass radius R4; wherein (i) the core comprises a maximum relative refractive index, ?1MAX, relative to the third annular region; (ii) wherein the first annular region comprises a radial width W2; and (iii) the second annular region comprises a minimum relative refractive index, ?3MIN, relative to the third annular region wherein ?1MAX>?2MAX>?3MIN, and ?2MIN>?3MIN; and the core and the cladding provide a fiber with cable cutoff less than 1500 nm, dispersion at 1550 nm less than 12 ps/nm/km, effective area at 1550 nm greater than 60 ?m2, a

Abstract: Disclosed is an optical fiber having a silica-based core comprising an alkali metal oxide a silica-based core, said core comprising an alkali metal oxide selected from the group consisting of K2O, Na2O, LiO2, Rb2O, Cs2O and mixtures thereof in an average concentration in said core between about 10 and 10000 ppm by weight, and a silica-based cladding surrounding and directly adjacent the core, the cladding including a region having a lower index of refraction than the remainder of such cladding. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained which exhibits a cable cutoff less than 1400 nm chromatic dispersion at 1550 nm between about 13 and 19 ps/nm/km, and a zero dispersion wavelength less than about 1324 nm.

Abstract: An optical fiber according to an embodiment of the present invention comprises: a glass core extending from a centerline to a radius R1 wherein R1 is greater than about 5 ?m; a glass cladding surrounding and in contact with the core, the cladding comprising: (i) a first annular region extending from the radius R1 to a radius R2, the first annular region comprising a radial width, W2=R2?R1, (ii) a second annular region extending from the radius R2 to a radius R3, and comprising a radial width, W3=R3?R2, and (iii) a third annular region surrounding the second annular region and extending from the radius R3 to an outermost glass radius R4; wherein the core comprises a maximum relative refractive index, ?1MAX, relative to the third annular region, and wherein ?1MAX is greater than about 0.1% and less than about 0.3%; the first annular region has a refractive index delta ?2(r) is less than about 0.

Abstract: Optical waveguide fiber that is bend resistant and single moded at 1260 nm and at higher wavelengths. The optical fiber includes a core and cladding, the cladding having an annular inner region, an annular ring region, and an annular outer region. The annular ring region has a low relative refractive index.

Abstract: An optical waveguide fiber having a zero-dispersion wavelength less than 1450 nm, a dispersion slope at a wavelength of 1550 of less than 0.06 ps/nm2/km nm, and attenuation at a wavelength of 1550 nm less than 0.190 dB/km. Optical fibers are disclosed that exhibit an effective area at a wavelength of 1550 nm of greater than 50 ?m2, and dispersion at a wavelength of 1550 nm between 5 and 15 ps/nm-km.

Abstract: Microstructured optical fiber for transmitting optical signals comprised of light, the optical fiber including a core region and a cladding region surrounding the core region, the cladding region including at least one annular region having an index of refraction lower than that of the remainder of the cladding. The optical fiber provides an absolute SBS threshold in dBm greater than about 9.3+10 log [(1?e?(0.19)(50)/4.343)/(1?e?(?)(L)/4.343)], wherein L is the length in km and ? is the attenuation in dB/km at 1550 nm, and a fiber cutoff wavelength of less than 1400 nm.

Abstract: An optical waveguide fiber having a core surrounded by a cladding. The core may have only a central segment, or a central segment and an annular segment surrounding the central segment. The central segment has a positive relative refractive index profile. The annular segment has a negative relative refractive index profile. The relative refractive index of the optical fiber provides an LP02 cable cutoff less than 850 nm and an LP21 cable cutoff less than 850 nm.

Abstract: Optical waveguide fiber that is bend resistant and single mode at 1260 nm and at higher wavelengths. The optical fiber includes a core of radius R1 and cladding, the cladding having an annular inner region of radius R2, an annular ring region, and an annular outer region. The annular ring region starts at R2, and the ratio R1/R2 is greater than 0.40.

Abstract: Optical waveguide fiber that is bend resistant and single moded at 1260 nm and at higher wavelengths. The optical fiber includes a core and cladding, the cladding having an annular inner region, an annular ring region, and an annular outer region. The annular ring region has a low relative refractive index.

Abstract: Disclosed is an optical fiber having a silica-based core comprising an alkali metal oxide a silica-based core, said core comprising an alkali metal oxide selected from the group consisting of K2O, Na2O, LiO2, Rb2O, Cs2O and mixtures thereof in an average concentration in said core between about 50 and 1000 ppm by weight, and a silica-based cladding surrounding and directly adjacent the core, said fiber comprising a cable cutoff less than 1400 nm chromatic dispersion at 1550 nm between about 13 and 19 ps/nm/km and a zero dispersion wavelength less than about 1324 nm. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained.

Abstract: A dispersion compensating optical fiber is disclosed having a high figure of merit. The optical fiber is highly dispersive and has low attenuation. The dispersion compensating optical fiber is suited for use with transmission optical fiber such as conventional single mode fiber. An optical transmission fiber and optical transmission system are also disclosed.

Abstract: An optical waveguide fiber having a core surrounded by a cladding. The core may have only a central segment, or a central segment and an annular segment surrounding the central segment. The central segment has a positive relative refractive index profile. The annular segment has a negative relative refractive index profile. The relative refractive index of the optical fiber provides an LP02 cable cutoff less than 850 nm and an LP21 cable cutoff less than 850 nm.

Abstract: An optical waveguide fiber comprises: (a) a core with a refractive index profile having, a radius, an alpha and a relative refractive index characterized by delta % that varies along the radius; (b) at least one cladding surrounding the core; wherein the alpha is less than 2.5, peak refractive index delta % is between 0.34% and 0.4%, the relative refractive index is less than 0.01% for all radii greater than 7 ?m, and this optical waveguide fiber has a mode field diameter MFD at a wavelength of 1310 nm of no more than 9.54 ?m, and attenuation less than: (a) 0.329 dB/km at a wavelength of 1310 nm, (b) 0.290 dB/km at a wavelength of 1383 nm, (c) 0.255 dB/km at a wavelength of 1410 nm, and (d) 0.189 dB/km at a wavelength of 1550 nm.

Abstract: An optical fiber (10) having a first section (10A) with little or no small-angle scattering (SAS) and a second section (10B) with an increased amount of SAS is disclosed. The optical fiber is formed by changing the draw temperature (TD) and/or the draw speed (VD) so as to induce index of refraction perturbations (P) at a core interface (40). The SAS optical fiber is useful in forming an evanescent optical fiber sensor (400), wherein the increased SAS enhances an evanescent wave portion (436) of a guided wave (434), which leads to increased sensitivity when measuring a property of a test medium (500).