BACKGROUND OF THE INVENTION

Field of the Invention

The present disclosure relates to the field of optical fibre. Particularly, the present disclosure relates to a cutoff shifted optical fibre with high mode field diameter. The present application is based on, and claims priority from Indian application 201921031253 filed on 2 Aug. 2019, the disclosure of which is hereby incorporated by reference herein.

Description of the Related Art

With the advancement of science and technology, various modern technologies are being employed for communication purposes. One of the most important modern communication technologies is optical fibre communication technology using a variety of optical fibres. Optical fibre is used to transmit information as light pulses from one end to another. The telecommunication industry is continuously striving for designs to achieve high optical signal to noise ratio and low losses. The ongoing research suggests that the optical fibre of G.654.E category is an improved version of G.654.B and an alternative to G.652.D that faces challenges in 400 G transmission in territorial long haul communication due to non-linear effects. In addition, major challenges in 400 G long haul communication are due to non-linear effects, low optical signal to noise ratio and high attenuation.

In light of the above stated discussion, there is a need for an optical fibre that overcomes the above sited drawbacks.

SUMMARY OF THE INVENTION

In an aspect, the present disclosure relates to an optical fiber. The optical fiber includes a core region. In addition, the optical fiber includes a primary trench region. Further, the optical fiber includes a secondary trench region adjacent to the primary trench region. The core region has a radius r1. Furthermore, the core region has a relative refractive index Δ1. The relative refractive index Δ1is in range of about 0 to 0.13. Moreover, the primary trench region has a relative refractive index Δ3. The primary trench region has a curve parameter αtrench-1. Also, the secondary trench region has a relative refractive index Δ4. The secondary trench region has a curve parameter αtrench-2. Also, the relative refractive index Δ of the secondary trench region is greater than the relative refractive index Δ of the primary trench region. Also, the optical fiber has a cable cutoff wavelength up to 1530 nanometer. Also, the optical fiber has attenuation of up to 0.17 dB/km at a wavelength of about 1550 nanometer. The optical fiber has a mode field diameter in range of about 12 micrometer to 13 micrometer. Also, the optical fiber has chromatic dispersion in range of about 17 picosecond per nanometer-kilometer to 23 picosecond per nanometer kilometer at wavelength of about 1550 nanometer. Also, the optical fiber has an effective area in range of about 110 micrometer square to 135 micrometer square. The optical fiber has macrobend loss up to 0.1 decibel per 100 turns corresponding to wavelength of 1625 nanometer at bending radius of about 30 millimeter and macrobend loss up to 0.03 decibel per 100 turns corresponding to wavelength of 1550 nanometer at bending radius of about 30 millimeter.

A primary object of the present disclosure is to provide an optical fibre with low loss.

Another object of the present disclosure is to provide the optical fibre with large mode field diameter.

In an aspect, the present disclosure provides an optical fiber. The optical fiber includes a core region. In addition, the optical fiber includes a primary trench region. Further, the optical fiber includes a secondary trench region adjacent to the primary trench region. The core region has a radius r1. Furthermore, the core region has a relative refractive index Δ1. The relative refractive index Δ1is in range of about 0 to 0.13. Moreover, the primary trench region has a relative refractive index Δ3. The primary trench region has a curve parameter αtrench-1. Also, the secondary trench region has a relative refractive index Δ4. The secondary trench region has curve parameter αtrench-2.

In an embodiment of the present disclosure, the optical fibre includes a buffer clad region. The buffer clad region separates the core region and the primary trench region.

In an embodiment of the present disclosure, the optical fibre includes a buffer clad region. In addition, the buffer clad region has a relative refractive index profile Δ2. The relative refractive index Δ2is in range of about −0.05 to 0.05. The buffer clad region has a radius r2. The radius r2is in range of about 6 micrometers to 6.4 micrometer.

In an embodiment of the present disclosure, the optical fibre includes a buffer clad region. The buffer clad region separates the core region and the primary trench region. In addition, the buffer clad region has a relative refractive index Δ2. The relative refractive index Δ2is in range of about −0.05 to 0.05. Further, the buffer clad region has a radius r2. The radius r2is in range of about 7.3 micrometer to 7.7 micrometer.

In an embodiment of the present disclosure, the optical fibre includes a buffer clad region. The buffer clad region separates the core region and the primary trench region. The buffer clad region has a relative refractive index Δ2.

In an embodiment of the present disclosure, the core region has a curve parameter α1. The curve parameter α1is in range of about 6 to 9. The core region has the radius r1in range of about 4.7 micrometer to 5.1 micrometer. The relative refractive index Δ3of the primary trench region is in range of about −0.28 to −0.32. The curve parameter of the primary trench region αtrench-1is in range of about 5 to 7. The relative refractive index Δ4of the secondary trench region is in range of about −0.41 to −0.45. The curve parameter of the secondary trench region αtrench-2is in range of about 6 to 9. The primary trench region has a radius r3. The radius r3is in range of about 11 micrometer to 13 micrometer. The secondary trench region has a radius r4. The radius r4is in range of about 23 micrometer to 28 micrometer.

In an embodiment of the present disclosure, the core region has a curve parameter α1. The curve parameter α1is in range of about 5 to 7. In addition, the core region has the radius r1in range of about 5.5 micrometer to 5.9 micrometer. The relative refractive index Δ3of the primary trench region is in range of about −0.28 to −0.32. The curve parameter of the primary trench region αtrench-1is in range of about 5 to 7. The relative refractive index Δ4of the secondary trench region is in range of about −0.42 to −0.48. The curve parameter of the secondary trench region αtrench-2is in range of about 7 to 9. The optical fibre includes a third trench region. The third trench region is adjacent to the secondary trench region. The relative refractive index Δ5of the third trench region is in range of about −0.1 to −0.15. The primary trench region has a radius r3. The radius r3is in range of about 10 micrometer to 14 micrometer. The secondary trench region has a radius r4. The radius r4is in range of about 16 micrometer to 20 micrometer. The third trench region has a radius r5. The radius r5is in range of about 38 micrometer to 42 micrometer.

In an embodiment of the present disclosure, the core region is defined along a central longitudinal axis of the optical fibre.

In an embodiment of the present disclosure, The relative refractive index Δ4of the secondary trench region is greater than The relative refractive index Δ3of the primary trench region.

In an embodiment of the present disclosure, the optical fibre includes a cladding region. The cladding region has a radius rclad. The radius rclad of the cladding region is up to 62.5 micrometer. Further, the cladding region has a relative refractive index Δclad of about 0.

In an embodiment of the present disclosure, the optical fibre has a cable cutoff wavelength up to 1530 nanometer. Also, the optical fibre has attenuation of up to 0.17 dB/km at a wavelength of about 1550 nanometer. In addition, the optical fibre has a mode field diameter in range of about 12 micrometer to 13 micrometer. Further, the optical fibre has chromatic dispersion in range of about 17 picosecond per nanometer-kilometer to 23 picosecond per nanometer-kilometer at wavelength of about 1550 nanometer. Furthermore, the optical fibre has an effective area in range of about 110 micrometer square to 135 micrometer square. Moreover, the optical fibre has macrobend loss up to 0.1 decibel per 100 turns corresponding to wavelength of 1625 nanometer at bending radius of about 30 millimeter and macrobend loss up to 0.03 decibel per 100 turns corresponding to wavelength of 1550 nanometer at bending radius of about 30 millimeter.

In another aspect, the present disclosure provides an optical fibre. The optical fibre includes a core region. In addition, the optical fibre includes a primary trench region. Further, the optical fibre includes a secondary trench region adjacent to the primary trench region. The core region has a radius r1. Furthermore, the core region has a relative refractive index Δ1. The relative refractive index Δ1is in range of about 0 to 0.13. Moreover, the primary trench region has a relative refractive index Δ3. The primary trench region has a curve parameter αtrench-1. Also, the secondary trench region has a relative refractive index Δ4. The secondary trench region has an curve parameter αtrench-2. Also, The relative refractive index Δ4of the secondary trench region is greater than The relative refractive index Δ3of the primary trench region. Also, the optical fibre has a cable cutoff wavelength up to 1530 nanometer. Also, The optical fibre has attenuation of up to 0.17 dB/km at a wavelength of about 1550 nanometer. The optical fibre has a mode field diameter in range of about 12 micrometer to 13 micrometer. Also, the optical fibre has chromatic dispersion in range of about 17 picosecond per nanometer-kilometer to 23 picosecond per nanometer kilometer at wavelength of about 1550 nanometer. Also, the optical fibre has an effective area in range of about 110 micrometer square to 135 micrometer square. The optical fibre has macrobend loss up to 0.1 decibel per 100 turns corresponding to wavelength of 1625 nanometer at bending radius of about 30 millimeters and macrobend loss up to 0.03 decibel per 100 turns corresponding to wavelength of 1550 nanometer at bending radius of about 30 millimeters.

