Sterlite Technologies Patente

The present disclosure provides an optical fiber (10) comprising one or more glass cores (12, 12₁, 12₂, 12₃, 12₄) extending along a length of the optical fiber (10) and a glass cladding (14) with a peripheral region (16), one or more interface regions (18, 18₁, 18₂, 18₃, 18₄) and one or more intermediate regions (20, 20₁, 20₂, 20₃, 20₄). The optical fiber (10) comprises an alumina (Al₂O₃) doping in the entire glass cladding (14) or at least one of the peripheral region (16), the one or more interface regions (18, 18₁, 18₂, 18₃, 18₄) and the one or more intermediate regions (20, 20₁, 20₂, 20₃, 20₄), provided that, when the optical fiber (10) comprises a single glass core (12), the alumina doping in the intermediate regions (20, 20₁, 20₂, 20₃, 20₄) is distributed among multiple intermediate regions (20, 20₁, 20₂, 20₃, 20₄) or included in combination with alumina doping in at least one of the peripheral region (16) and the one or more interface regions (18, 18₁, 18₂, 18₃, 18₄).

The present disclosure provides a method for performing curing during manufacturing of an optical fibre ribbon. The method performs a first stage of curing and a second stage of curing on a matrix material of the optical fibre ribbon. The first stage of curing is performed using a ribbon die (102) and one or more ultraviolet light emitting diode (UV LED) units (104). Further, the second stage of curing is performed using a source (202) of the one or more ultraviolet lamps (UV lamps) in an UV chamber (204).

The present disclosure relates to a fiber enclosure (300) for receiving and managing a plurality of optical fibers including a housing defining an interior volume, a plurality of input ports (308) provided on at least one of the sidewalls (304), a plurality of fanout units (310, 312) disposed within the housing, a multi-tiered adapter frame (402) comprising a stair arrangement removably mounted within the interior volume of the housing and and a plurality of optical fiber adapters (404). Further the multi-tiered adapter frame (402) includes a plurality of horizontally-extending step portions (412) separated by vertically-extending riser portions (430). Each of the horizontally-extending step portions (412) lie in a horizontal plane vertically offset from adjacent horizontally-extending step portions (412).

The present invention relates to an optical fiber (100, 200, 300, 400) comprising one or more cores (102), a clad enveloping the one or more cores and a buffer clad layer (202, 302, 402) between the first clad layer and the second clad layer. Particularly, the clad includes a first clad layer (104) is made of silica with less than 0.1% metallic impurity and a second clad layer (106) is made of silica with greater than 0.1% of metallic impurity. Further, the first clad layer has less than 800 ppm OH content, less than 10 ppm aluminium and less than 2 ppm sodium and the second clad layer has less than 50 ppm OH content, more than 10 ppm aluminium and more than 2 ppm sodium.

The present disclosure provides a hardened connector (100) configured to engage with a port (52) of an optical fiber terminal (50) comprises a multi-part assembly (102) with protruded skirt (108) positioned between a front end (104) and a rear end (106); a first intermediate portion (110) positioned between the rear end (106) and the protruded skirt (108) and a channel (130) formed between plurality of extended fingers and a recessed portion (118) configured to receive a mating protrusion (56) provided in the port, thereby enabling alignment of the hardened connector in the port of the optical fiber terminal. The protruded skirt (108) and the first intermediate portion (110) enable locking of the hardened connector (100) within the port, when the front end of the hardened connector is pushed into the port.

The present disclosure provides a fiber optic closure with a splicing tray support unit, a fiber guiding unit disposed in the splicing tray support unit. The fiber guiding unit comprises the first and second set of guide structures adapted to route one or more incoming optical fibers and one more outgoing optical fiber, respectively, passing through the fiber guiding unit. Further, the fiber optic closure has one or more wings pivotally mounted on the splicing tray support unit, and adapted to allow passage of the one or more fiber cables in one or more routing configurations.

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The present disclosure provides a hanger kit (102) for installing a hanger (108) over a cable (104) to mount an optical fiber closure (106) aerially over the cable (104) comprising a bracket (110) with a vertical arm (122) and a horizontal arm (124) having a curved portion (126) and a support arm (112) with a first end (112a) and a second end (112b). In particular, the first end (112a) is adapted to be engaged with the vertical arm (122) such that the support arm (112) is substantially parallel to the horizontal arm (124) in an installed configuration of the hanger (108).

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The present disclosure provides an optical fiber cable (100, 200, 300) comprising one or more tubes (104) enclosing at least one optical fiber (102), a sheath (106) surrounding the one or more tubes (104) and one or more strength members (108) embedded in the sheath (106). In particular, the one more strength members (108) are in a pre-elongated configuration and are elongated by 0.02% - 0.1% in the pre-elongated configuration. Additionally, the one or more strength members (108) are embedded at a tension of 1.5-8 kgf and have an elongation at break less than or equal to 2%. Further, the optical fiber cable (100, 200, 300) has a tensile break load of less than 2100N.

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An optical fibre (100) includes a glass core (102), a trench region (106) and a cladding (108). The optical fibre (100) includes a glass core (102) that may have a core curve parameter α<core> in a range of 6 to 12. The optical fibre (100) includes trench region (106) has a trench curve parameter α<trench> in range of 5 to 8. The optical fibre (100) includes a cladding (108) that has a cladding relative refractive index in range of 0 to 0.05 and a cladding thickness in a range of 42.9 to 47.1 microns. The optical fibre (100) includes a buffer clad region (104) after the glass core (102) and before the trench region (106). The optical fibre (100) has a mode field diameter in range of 8.7 micrometers to 9.7 micrometers at wavelength of 1310 nanometer.

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Disclosed is a fiber closure external cable clip (100, 200, 300) to be mounted on a port (102) of the fiber closure (104) comprises a petal region (106) configured to be detachably secured with the port (102) and an anchoring region (108) having one or more anchoring clamps (116) is structurally connected to the petal region (106). In particular, the optical fiber cable entering and/or exiting the fiber enclosure (104) is detachably secured to exactly one anchoring clamp of the one or more anchoring clamps (116), thereby restricting a radial movement of the optical fiber cable (130).

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Disclosed is an optical fiber cable (100, 200, 300) comprising: a plurality of optical fibers (102); a thermoplastic layer (104) extruded over the plurality of optical fibers (102) to form an optical unit (108) such that the thermoplastic layer (104) contacts a surface area in a range of 50% to 95% of each optical fiber of the plurality of optical fibers (102); and a sheath (106) that surrounds the optical unit (108).

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The present disclosure provides an optical fibre ribbon (100). The optical fibre ribbon (100) includes a plurality of optical fibres (104) bonded with a matrix material (102). The matrix material (102) is applied along a longitudinal length of the plurality of optical fibres (104). Further, the plurality of optical fibres (104) is defined by a geometrical centre and diameter. Further, the plurality of optical fibres (104) has a predefined distance (P) between geometrical centres (106, 108) of any two adjacent optical fibres of the plurality of optical fibres (104). Moreover, the predefined distance (P) between geometrical centres (106, 108) of any two adjacent optical fibres of the plurality of optical fibres (104) is less than 200 microns. Further, the optical fibre ribbon (100) provides the optical fibre ribbon cable (200) 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 (100) with reduced weight and with high mass fusion splicing capability.

The present disclosure relates to an optical fiber draw tower and a processing/drawing method thereof. The draw tower (100) comprises a top end zone (108) and a bottom end zone (110), a preform (104) inserted at the top end zone and is melted into an optical fiber (106) that exits from the bottom end zone(110). In particular, the fluid is inserted into the draw tower from the top end zone. Moreover, the draw tower further includes a plurality of air knives (112) distorting optical fiber path such that partially uncooled optical fiber deviates from a vertical path and follows a bended path. Further, the bended path length is greater than a vertical path length and is defined by laminar flow for at least 70% of the bended path length.

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The present disclosure relates to an optical fiber (100) having a core region (102) and a cladding (104) defined by a relative refractive index profile (202). Particularly, the relative refractive index profile (202) varies from a center of the core region (102) to a periphery of the cladding (104). Moreover, the relative refractive index profile (202) has at least two low relative refractive index regions (208, 210) such that a relative refractive index at an interface (212, 218) of the at least two low relative refractive index regions (208, 210) is in a range between 0 and -0.1%.

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