Abstract: The present disclosure provides an optical fiber cable (200, 300) with a compressed core (206, 306) and manufacturing method thereof. The method includes bundling a plurality of optical transmission elements (202, 302) to form a core (206, 306) of the optical fiber cable (200, 300) and compressing the core (206, 306). The method further includes extruding a sheath (212, 312) around the compressed core (206, 306), wherein the core (206, 306) is compressed to a smaller diameter by a compression tool. The compression tool has a cylindrical cavity, wherein an internal diameter of the cylindrical cavity gradually decreases from a first end to a second end of the compression tool. The core enters from the first end of the compression tool with a diameter d and exits from the second end with a diameter d-?d, such that ?d/d is greater than or equal to 0.05.

Abstract: The present invention relates to an optical fibre cable (100, 200) with a sheath (106) surrounding one or more tubes (104) and one or more strength members (108) partially embedded in the sheath (106). Each of the one or more tubes (104) encloses at least one optical fiber (102) having a diameter of 200±20 um. In particular, one or more tubes (104) has a tube length greater than a cable length. Moreover, the one or more tubes (104) has a young's modulus of less than or equal to 700 N and a lay-length of equal to or more than 400 mm. Further, the optical fiber cable (100, 200) breaks at a pre-defined load.

Abstract: The present invention relates to an optical fiber cable (100) comprising an optical fiber unit (102), optical fiber (104), a tight buffer layer (106), a sheath (108), a plurality of strength members (110a, 110b, 110c), a water swellable element (112) and a filling strength member (SM) 114. In particular, the optical fiber cable (100) is an all-dielectric communication cable with a preferential bending ratio between 1-2. Moreover, the strength members (110a, 110b, 110c) have an elastic modulus greater than 45 GPa and each strength member of the plurality of strength members (110a, 110b, 110c) has a diameter between 0.4 mm to 0.8 mm.

Abstract: The present disclosure provides an intermittently bonded optical fibre ribbon. The intermittently bonded optical fibre ribbon includes a plurality of optical fibres. The plurality of optical fibres are bonded intermittently along the length by a plurality of bonded portions spaced apart by a plurality of un-bonded portions. The plurality of bonded portions is defined by a bonded length Li and the plurality of un-bonded portions is defined by an un-bonded length. In addition, at least one of the bonded length Li and the un-bonded length varies along a predefined length of adjacent optical fibres of the plurality of optical fibres.

Abstract: The present disclosure provides an optical fiber cable (200, 300) with a compressed core (206, 306) and manufacturing method thereof. The method includes bundling a plurality of optical transmission elements (202, 302) to form a core (206, 306) of the optical fiber cable (200, 300) and compressing the core (206, 306). The method further includes extruding a sheath (212, 312) around the compressed core (206, 306), wherein the core (206, 306) is compressed to a smaller diameter by a compression tool. The compression tool has a cylindrical cavity, wherein an internal diameter of the cylindrical cavity gradually decreases from a first end to a second end of the compression tool. The core enters from the first end of the compression tool with a diameter d and exits from the second end with a diameter d-?d, such that ?d/d is greater than or equal to 0.05.

Abstract: An optical fiber cable with one or more coil elements is provided. The optical fiber cable (200, 300, 400) comprises one or more optical transmission elements (202, 302, 402) extending in a longitudinal direction surrounded by one or more coil elements (100). The one or more coil elements are a series of loops such that each loop (106) from the series of loops is physically connected to adjacent loops. The one or more coil elements are flexible in transverse direction and are substantially non-elongatable in the longitudinal direction. The one or more coil elements are fiber retaining element (102) such that subsequent loops (106) are made of a single continuous element and further comprises a pitch retaining element (104) connecting the subsequent loops of the fiber retaining element to preserve relative position of the subsequent loops.

Abstract: A gas leak proof corrugated sheath design for reducing friction in an optical fiber cable (100) includes a plurality of ribbons (102) in a plurality of ribbon bundles (104), one or more water swellable yarns (110), a first layer (106), one or more ripcords (108), one or more strength members (112) and a second layer (114). The first layer, surrounding the plurality of ribbon bundles by the second layer having a plurality of ribs (116) and a plurality of grooves (118) to reduce number of contact points between the optical fiber cable and a duct to reduce coefficient of friction between the second layer and an inner surface of the duct.

Abstract: A ribbed and grooved fiber cable (100) includes a core with a plurality of optical fibers, a sheath (102) enveloping the core and one or more strength members (108) embedded in the sheath (102). The strength members (108) are coated with a water blocking coating material having at least one of an ultraviolet (UV) curable water swellable resin composition and a layer of ethylene acrylic acid (EAA). Particularly, the water blocking coating material applied over the strength members (108) has a thickness of 50±10 microns. The sheath (102) of the cable (100) has at least one of a plurality of ribs (104) and grooves (106) on an external surface of the sheath (102), and a plurality of ribs (104a) and grooves (106a) on an internal surface of the sheath (102). The plurality of ribs (104) have variable height.

Abstract: The method provided by the present disclosure is for performing curing during manufacturing of an optical fibre ribbon. The method of the present disclosure performs a first stage of curing and a second stage of curing 200 on a matrix material of the optical fibre ribbon. The first stage of curing is performed using a ribbon die and one or more ultraviolet light emitting diode (UV LED) units. Further, the second stage of curing is performed using a source of the one or more ultraviolet lamps (UV lamps) in an UV chamber.

Abstract: The present disclosure relates to method for underground installation of a pre-ducted optical fiber cable assembly. The method includes a first step of drilling a first pilot bore from a second manhole to a first manhole. In addition, the method includes a second step of pulling the pre-ducted optical fiber cable assembly. Further, the method includes a third step of drilling a second pilot bore from a third manhole to the second manhole. Furthermore, the method includes a fourth step of pulling the pre-ducted optical fiber cable assembly from the second manhole to the third manhole. Moreover, the method of underground installation of the pre-ducted optical fiber cable assembly eliminates the need for blowing the pre-ducted optical fiber cable assembly with a cable blowing machine.

Abstract: A gas leak proof corrugated sheath design for reducing friction in an optical fiber cable (100) includes a plurality of ribbons (102) in a plurality of ribbon bundles (104), one or more water swellable yarns (110), a first layer (106), one or more ripcords (108), one or more strength members (112) and a second layer (114). The first layer, surrounding the plurality of ribbon bundles by the second layer having a plurality of ribs (116) and a plurality of grooves (118) to reduce number of contact points between the optical fiber cable and a duct to reduce coefficient of friction between the second layer and an inner surface of the duct.

Abstract: The present disclosure provides an optical fibre ribbon. The optical fibre ribbon includes a plurality of optical fibres bonded with a matrix material. The matrix material is applied along a longitudinal length of the plurality of optical fibres. Further, the plurality of optical fibres is defined by a geometrical centre and diameter. Further, the plurality of optical fibres has a predefined distance between geometrical centres of any two adjacent optical fibres of the plurality of optical fibres. Moreover, the predefined distance between geometrical centres of any two adjacent optical fibres of the plurality of optical fibres is less than 200 microns. Further, the optical fibre ribbon provides the optical fibre ribbon cable that is flexible and easy to install in space constraint regions and allows ribbons to bend easily at non-preferential axis. Furthermore, the optical fibre ribbon with reduced weight and with high mass fusion splicing capability.

Abstract: The present disclosure provides an optical fiber cable (100). The optical fiber cable (100) includes a first layer (108) and a second layer (110). The second layer (110) surrounds the first layer (108). The first layer (108) includes a first plurality of buffer tubes (122). The second layer (110) comprises a second plurality of buffer tubes (124). Each buffer tube of the first plurality of buffer tubes (122) and the second plurality of buffer tubes (124) has a thickness of at most 0.15 millimeter. Each buffer tube of the first plurality of buffer tubes (122) and the second plurality of buffer tubes (124) includes a first material layer (126) and a second material layer (128). The second material layer (128) surrounds the first material layer (126). The first material layer (126) is made of polybutylene terephthalate. The second material layer (128) is made of polycarbonate.

Abstract: The present disclosure provides a thermal resistant water blocking tape for use in an optical fiber cable. The thermal resistant water blocking tape includes a water blocking tape. The water blocking tape is resistant to water penetration. The water blocking tape is defined by a top surface and a bottom surface. In addition, the water blocking tape has an intumescent material that reduces transmission of thermal radiations across the thermal resistant water blocking tape at elevated temperature. The intumescent material may be coated on the water blocking tape. The intumescent material may produce insulating carbonaceous foam at elevated temperature.

Abstract: A ribbed and grooved fiber cable (100) includes a core with a plurality of optical fibers, a sheath (102) enveloping the core and one or more strength members (108) embedded in the sheath (102). The strength members (108) are coated with a water blocking coating material having at least one of an ultraviolet (UV) curable water swellable resin composition and a layer of ethylene acrylic acid (EAA). Particularly, the water blocking coating material applied over the strength members (108) has a thickness of 50±10 microns. The sheath (102) of the cable (100) has at least one of a plurality of ribs (104) and grooves (106) on an external surface of the sheath (102), and a plurality of ribs (104a) and grooves (106a) on an internal surface of the sheath (102). The plurality of ribs (104) have variable height.

Abstract: The present disclosure provides an optical fiber cable. The optical fiber cable includes a central strength member. The central strength member lies substantially along a longitudinal axis of the optical fiber cable. The optical fiber cable includes at least one buffer tube. The at least one buffer tube is stranded helically around the central strength member. Each of the at least one buffer tube encapsulates at least one optical fiber. The optical fiber cable includes a first layer. The first layer circumferentially surrounds a core of the optical fiber cable. The optical fiber cable includes a second layer. The second layer is formed of high density polyethylene. The optical fiber cable includes at least one set of water swellable yarn and a plurality of ripcords.

Abstract: The present disclosure provides a stacking arrangement of an optical fiber ribbon in a buffer tube of an optical fiber cable. The stacking arrangement includes optical fiber ribbon stack, first bendable optical fiber ribbon, second bendable optical fiber ribbon, third bendable optical fiber ribbon, fourth bendable optical fiber ribbon and optical fiber ribbons. The optical fiber ribbon stack includes at least four corners. Each optical fiber at the corresponding four corners of the optical fiber ribbon stack is a bend insensitive optical fiber. One or more optical fibers are placed adjacent to each other at the corresponding four corners of the optical fiber ribbon stack.

Abstract: The present disclosure provides an intermittently bonded optical fibre ribbon. The intermittently bonded optical fibre ribbon includes a plurality of optical fibres. The plurality of optical fibres are bonded intermittently along the length by a plurality of bonded portions spaced apart by a plurality of un-bonded portions. The plurality of bonded portions is defined by a bonded length Li and the plurality of un-bonded portions is defined by an un-bonded length. In addition, at least one of the bonded length Li and the un-bonded length varies along a predefined length of adjacent optical fibres of the plurality of optical fibres.

Abstract: The present disclosure provides a stacking arrangement of an optical fiber ribbon in a buffer tube of an optical fiber cable. The stacking arrangement includes optical fiber ribbon stack, first bendable optical fiber ribbon, second bendable optical fiber ribbon, third bendable optical fiber ribbon, fourth bendable optical fiber ribbon and optical fiber ribbons. The optical fiber ribbon stack includes at least four corners. Each optical fiber at the corresponding four corners of the optical fiber ribbon stack is a bend insensitive optical fiber. One or more optical fibers are placed adjacent to each other at the corresponding four corners of the optical fiber ribbon stack.

Abstract: The optical fibre ribbon provided by the present disclosure includes a plurality of optical fibres and a matrix material. In addition, each of the plurality of optical fibres is arranged in a linear array in the optical fibre ribbon. Further, each of the plurality of optical fibres includes a core and a cladding. Furthermore, the matrix material of the optical fibre ribbon acts as a covering for the plurality of optical fibres. Furthermore, the matrix material of the optical fibre ribbon is characterised by thickness.