Sterlite Technologies Limited

Other

Srinivas Reddy Munige

Anand Kumar Pandey

Apeksha Malviya

Ranjith Balakrishnan

Radhika Velayudhan

MalleswaraRao Lanke

Apeksha Malaviya

Malleswara Rao Lanke

Shubham

Janarthanan Balakrishnan

Milind Patil

Anant Pawale

Anand Pandey

The present invention relates to an optical fiber () comprising a silica region (), a first coating (), and a second coating (). The first coating () is adapted to cover an outer circumference of the silica region (). The second coating () adapted to cover an outer surface of the first coating (). Moreover, the first coating () and the second coating () are adapted to cause a coating induced micro bend loss that is less than 2.2×10Nmm.

Optical fiber with improved microbending performance

The present disclosure provides an optical fibre. The optical fibre includes a glass core, a glass cladding, a primary coating layer, and a secondary coating layer. The glass cladding surrounds the glass core. In addition, the primary coating layer sandwiched between the glass cladding and the secondary coating layer. Further, the secondary coating layer surrounds the primary coating layer. The primary coating layer has diameter of up to is in the range of 130 to 155 micrometers. Furthermore, the secondary coating layer has diameter in a range of about 160 micrometers to 180 micrometers. Moreover, diameter of the optical fibre is about 190 micrometers.

Reduced diameter optical fibre

Disclosed is a multi-core optical fiber having a plurality of cores extending parallelly along a central axis of the multi-core optical fiber. Each core of the plurality of cores is up-doped with an up-dopant. The multi-core optical fiber further has a plurality of buffer layers such that each buffer layer of the plurality of buffer layers envelop a corresponding core of the plurality of cores. Each buffer layer of the plurality of buffer layers has a predefined buffer layer thickness. The multi-core optical fiber further has a plurality of trench layers such that each trench layer of the plurality of trench layers envelops a corresponding buffer layer of the plurality of buffer layers. Each trench layer of the plurality of trench layers is down-doped with a down-dopant. The multi-core optical fiber has an inter-core crosstalk of less than −30 decibel/kilometres (dB/km) at a wavelength of 1550 nanometres (nm).

Trench assisted multi-core optical fiber with reduced crosstalk

The present disclosure provides a universal optical fiber (). The universal optical fiber () includes a core () extended from a central longitudinal axis () to a first radius r. In addition, the universal optical fiber () includes a buffer clad () region extending from the first radius rto a second radius r. Further, the universal optical fiber () includes a trench region () extending from the second radius rto a third radius r. Furthermore, the universal optical fiber () includes a cladding () extending from the third radius to a fourth radius r. Moreover, the core (), the buffer clad region (), the trench region () and the cladding () are concentrically arranged.

Universal optical fiber

The present disclosure provides an optical fibre (). The optical fibre () includes a glass core region (). The glass core region () has a core relative refractive index profile. The core relative refractive index profile is a super Gaussian profile. In addition, the optical fibre () includes a glass cladding region () over the glass core region (). The optical fibre () has at least one of a mode field diameter in a range of 8.7 micrometers to 9.7 micrometers at wavelength of 1310 nanometers and an attenuation up to 0.18 dB/km. The optical fibre () has at least one of macro-bend loss up to 0.5 decibel per turn corresponding to wavelength of 1550 nanometer at bending radius of 7.5 millimeter. The optical fibre () has a macro-bend loss up to 1.0 decibel per turn corresponding to wavelength of 1625 nanometer at bending radius of 7.5 millimeter.

Universal optical fibre with super Gaussian profile

The present disclosure provides an optical fibre (). The optical fibre () includes a glass core (), a trench region () and a cladding (). The trench region () has a trench curve parameter &#x3b1;in range of 5 to 8. The optical fibre () has a mode field diameter in range of 8.7 micrometers to 9.7 micrometers at wavelength of 1310 nanometer.

Universal optical fibre compatible with rod-in-cylinder

The present disclosure provides an optical fibre. The optical fibre includes a core, an inner cladding, a first trench region, an intermediate cladding, a second trench region, and an outer cladding. The core has a first radius. The inner cladding is defined by the first radius and a second radius of the optical fibre. The first trench region is defined by the second radius and a third radius. The first trench region. The intermediate cladding is defined by the third radius and a fourth radius. The second trench region is defined by the fourth radius and a fifth radius. The outer cladding is defined by the fifth radius and a sixth radius.

Universal optical fibre with double trench

The present disclosure provides a few mode optical fiber (). The few mode optical fiber () includes a core (). The core () defined by a region around a central longitudinal axis () of the few mode optical fiber (). In addition, the core () has a super gaussian refractive index profile with curve parameter gammaand rescale factor (a). In addition, the core () has a first annular region () extended from central longitudinal axis () of the few mode optical fiber () to radius r. Further, the core () has a second annular region () extended from radius rto radius r. Furthermore, the core () has a third annular region () extended from radius rto radius r. In addition, the few mode optical fiber () has a cladding () extended from radius rto radius r.

Few mode optical fiber

The present disclosure provides an optical fiber (). The optical fiber () includes a core region (). The core region () is defined by a region around central longitudinal axis () of the optical fiber (). In addition, the core region () has a first annular region (). The first annular region () is defined from the central longitudinal axis () to a first radius from the central longitudinal axis. Moreover, the core region () has a second annular region (). The second annular region () is defined from the first radius to a second radius. Further, the core region () has a third annular region (). The third annular region () is defined from the second radius to a third radius. Also, the optical fiber () includes a cladding (). The cladding region () has a fourth radius.

Non-zero dispersion shifted fiber with low cut off wavelength and large effective area

The present disclosure provides a few mode optical fiber (). The few mode optical fiber () includes a core region (). A core region () defined by a region around a central longitudinal axis () of the few mode optical fiber (). In addition, the core region () has a first annular region () extended from central longitudinal axis () to radius r, a second annular region () extended from radius rto radius r, a third annular region () extended from radius rto radius r, a fourth annular region () extended from radius rto radius rand a fifth annular region () extended from radius rto radius r. Also, the few mode optical fiber () has a cladding defined by the sixth annular region () extended from radius rto radius r.

The present disclosure provides a few mode optical fiber. The few mode optical fiber includes a core region. A core region defined by a region around a central longitudinal axis of the few mode optical fiber. In addition, the core region has a first annular region extended from central longitudinal axis to radius r, a second annular region extended from radius rto radius r, a third annular region extended from radius rto radius r, a fourth annular region extended from radius rto radius rand a fifth annular region extended from radius rto radius r. Also, the few mode optical fiber has a cladding defined by the sixth annular region extended from radius rto radius r.

The present disclosure provides an optical fiber. The optical fiber includes a core region. The core region is defined by a region around central longitudinal axis of the optical fiber. In addition, the core region has a first annular region. The first annular region is defined from the central longitudinal axis to a first radius rfrom the central longitudinal axis. Moreover, the core region has a second annular region. The second annular region is defined from the first radius rto a second radius r. Further, the core region has a third annular region. The third annular region is defined from the second radius rto a third radius r. Also, the optical fiber includes a cladding. The cladding region has a fourth radius r.

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Aurangabad, India

Srinivas Reddy Munige