Abstract: The present disclosure provides a universal optical fiber (100). The universal optical fiber (100) includes a core (102) extended from a central longitudinal axis (110) to a first radius r1. In addition, the universal optical fiber (100) includes a buffer clad (104) region extending from the first radius r1 to a second radius r2. Further, the universal optical fiber (100) includes a trench region (106) extending from the second radius r2 to a third radius r3. Furthermore, the universal optical fiber (100) includes a cladding (108) extending from the third radius to a fourth radius r4. Moreover, the core (102), the buffer clad region (104), the trench region (106) and the cladding (108) are concentrically arranged.

Abstract: The present invention relates to an ultra-low loss optical fiber for long haul communications (100) comprising a core region (102) defined by a core relative refractive index and a cladding region surrounding the core region, defined by a cladding relative refractive index. In particular, the core region comprises a relative refractive index in a range of ?0.06% to +0.06% and the cladding region is down-doped for entire radial cladding thickness. Moreover, the cladding region further comprises an inner cladding region (104) defined by an inner cladding relative refractive index and an outer cladding region (106) defined by an outer cladding relative refractive index. The inner cladding relative refractive index is less than the outer cladding relative refractive index.

Abstract: Disclosed is a multi-core optical fiber including a plurality of cores extending parallelly along a central axis of the multi-core optical fiber, and defining a plurality of spatial paths such that each core of the plurality of cores has a refractive index profile having a predefined core alpha value in a range from about 5 to about 9. A core pitch between each pair of cores of the plurality of cores is in a range from about 35 micrometres to about 45 micrometres. Further, at least one core of the plurality of cores has (i) a refractive index profile different from other cores of the plurality of cores, and (ii) a core diameter different from the other cores of the plurality of cores.

Abstract: 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).

Abstract: 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.

Abstract: 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.

Abstract: The present disclosure provides a few mode optical fiber (100). The few mode optical fiber (100) includes a core (102). The core (102) defined by a region around a central longitudinal axis (112) of the few mode optical fiber (100). In addition, the core (102) has a super gaussian refractive index profile with curve parameter gamma and rescale factor (a). In addition, the core (102) has a first annular region (104) extended from central longitudinal axis (112) of the few mode optical fiber (100) to radius r1. Further, the core (102) has a second annular region (106) extended from radius r1 to radius r2. Furthermore, the core (102) has a third annular region (108) extended from radius r2 to radius r3. In addition, the few mode optical fiber (100) has a cladding (110) extended from radius r3 to radius r4.

Abstract: The present disclosure provides an optical fiber (100). The optical fiber (100) includes a core region (102). The core region (102) is defined by a region around central longitudinal axis (112) of the optical fiber (100). In addition, the core region (100) has a first annular region (106). The first annular region (106) is defined from the central longitudinal axis (112) to a first radius from the central longitudinal axis. Moreover, the core region (102) has a second annular region (108). The second annular region (108) is defined from the first radius to a second radius. Further, the core region (102) has a third annular region (110). The third annular region (110) is defined from the second radius to a third radius. Also, the optical fiber (100) includes a cladding (104). The cladding region (104) has a fourth radius.

Abstract: The present disclosure provides a few mode optical fiber (100). The few mode optical fiber (100) includes a core (102). The core (102) defined by a region around a central longitudinal axis (112) of the few mode optical fiber (100). In addition, the core (102) has a super gaussian refractive index profile with curve parameter gamma and rescale factor (a). In addition, the core (102) has a first annular region (104) extended from central longitudinal axis (112) of the few mode optical fiber (100) to radius r1. Further, the core (102) has a second annular region (106) extended from radius r1 to radius r2. Furthermore, the core (102) has a third annular region (108) extended from radius r2 to radius r3. In addition, the few mode optical fiber (100) has a cladding (110) extended from radius r3 to radius r4.

Abstract: The present disclosure provides a universal optical fiber (100). The universal optical fiber (100) includes a core (102) extended from a central longitudinal axis (110) to a first radius r1. In addition, the universal optical fiber (100) includes a buffer clad (104) region extending from the first radius r1 to a second radius r2. Further, the universal optical fiber (100) includes a trench region (106) extending from the second radius r2 to a third radius r3. Furthermore, the universal optical fiber (100) includes a cladding (108) extending from the third radius to a fourth radius r4. Moreover, the core (102), the buffer clad region (104), the trench region (106) and the cladding (108) are concentrically arranged.

Abstract: The present disclosure provides a few mode optical fiber (100). The few mode optical fiber (100) includes a core region (102). A core region (102) defined by a region around a central longitudinal axis (116) of the few mode optical fiber (100). In addition, the core region (102) has a first annular region (106) extended from central longitudinal axis (116) to radius r1, a second annular region (108) extended from radius r1 to radius r2, a third annular region (110) extended from radius r2 to radius r3, a fourth annular region (112) extended from radius r3 to radius r4 and a fifth annular region (114) extended from radius r4 to radius r5. Also, the few mode optical fiber (100) has a cladding defined by the sixth annular region (104) extended from radius r5 to radius r6.

Abstract: 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 r1, a second annular region extended from radius r1 to radius r2, a third annular region extended from radius r2 to radius r3, a fourth annular region extended from radius r3 to radius r4 and a fifth annular region extended from radius r4 to radius r5. Also, the few mode optical fiber has a cladding defined by the sixth annular region extended from radius r5 to radius r6.

Abstract: The present disclosure provides an optical fiber (100). The optical fiber (100) includes a core region (102). The core region (102) is defined by a region around central longitudinal axis (112) of the optical fiber (100). In addition, the core region (100) has a first annular region (106). The first annular region (106) is defined from the central longitudinal axis (112) to a first radius from the central longitudinal axis. Moreover, the core region (102) has a second annular region (108). The second annular region (108) is defined from the first radius to a second radius. Further, the core region (102) has a third annular region (110). The third annular region (110) is defined from the second radius to a third radius. Also, the optical fiber (100) includes a cladding (104). The cladding region (104) has a fourth radius.

Abstract: The present disclosure provides a few mode optical fiber (100). The few mode optical fiber (100) includes a core region (102). A core region (102) defined by a region around a central longitudinal axis (116) of the few mode optical fiber (100). In addition, the core region (102) has a first annular region (106) extended from central longitudinal axis (116) to radius r1, a second annular region (108) extended from radius r1 to radius r2, a third annular region (110) extended from radius r2 to radius r3, a fourth annular region (112) extended from radius r3 to radius r4 and a fifth annular region (114) extended from radius r4 to radius r5. Also, the few mode optical fiber (100) has a cladding defined by the sixth annular region (104) extended from radius r5 to radius r6.

Abstract: 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 r1 from the central longitudinal axis. Moreover, the core region has a second annular region. The second annular region is defined from the first radius r1 to a second radius r2. Further, the core region has a third annular region. The third annular region is defined from the second radius r2 to a third radius r3. Also, the optical fiber includes a cladding. The cladding region has a fourth radius r4.

Abstract: 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 r1 from the central longitudinal axis. Moreover, the core region has a second annular region. The second annular region is defined from the first radius r1 to a second radius r2. Further, the core region has a third annular region. The third annular region is defined from the second radius r2 to a third radius r3. Also, the optical fiber includes a cladding. The cladding region has a fourth radius r4.

Abstract: 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 r1, a second annular region extended from radius r1 to radius r2, a third annular region extended from radius r2 to radius r3, a fourth annular region extended from radius r3 to radius r4 and a fifth annular region extended from radius r4 to radius r5. Also, the few mode optical fiber has a cladding defined by the sixth annular region extended from radius r5 to radius r6.