Multicore optical fiber and multicore optical fiber cable
OwnerApeksha Malviya, Srinivas Reddy Munige +2inventors
InventorsApeksha Malviya, Srinivas Reddy Munige, Saurabh Kapoor, Anand Pandey
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Abstract
The present invention relates to a multi-core optical fiber having a plurality of cores (102) and a cladding (108) surrounding the plurality of cores (102). The cladding (108) has a peripheral cladding layer (108b) that is down doped such that a leakage loss of the multi-core optical fiber (100) is less than 0.001 Decibel/Kilometer (dB/Km) at a wavelength 1550 nanometers (nm).
Claims16
A multi-core optical fiber (100) comprising:
- a plurality of cores (102);
- a plurality of buffer layers (104) surrounding the plurality of cores (102), wherein the plurality of buffer layers (104) are undoped, wherein the plurality of buffer layers (104) has a first thickness (T1) in a range of 1 μm to 2 μm;
- a plurality of trench layers (106) surrounding the plurality of buffer layers (104), wherein the plurality of trench layers (106) are down doped;
- and
- a cladding (108) that surrounds the plurality of cores (102), wherein the cladding (108) comprising a peripheral cladding layer (108b),
- wherein the peripheral cladding layer (108b) is down doped such that a leakage loss of the multi-core optical fiber (100) is less than 0.001 dB/Km at a wavelength 1550 nm, wherein a diameter of the multi-core optical fiber (100) without a coating layer is in a range of 80 micrometres (μm) to 100 μm with a tolerance of ±1 μm.
A multi-core optical fiber cable (120) incorporates one or more multi-core optical fiber ribbon (122) in which a plurality of multi-core optical fibers (100) are intermittently bonded, and the multi-core optical fiber ribbon (122) is incorporated with spirally twisted, wherein each multi-core optical fibers (100) of the plurality of multi-core optical fibers (100) comprising:
- a plurality of cores (102);
- a plurality of buffer layers (104) surrounding the plurality of cores (102), wherein the plurality of buffer layers (104) are undoped, wherein the plurality of buffer layers (104) has a first thickness (T1) in a range of 1 μm to 2 μm;
- a plurality of trench layers (106) surrounding the plurality of buffer layers (104), wherein the plurality of trench layers (106) are down doped;
- and
- a cladding (108) that surrounds the plurality of cores (102), wherein the cladding (108) comprising a peripheral cladding layer (108 b),
- wherein the peripheral cladding layer (108 b) is down doped, wherein a diameter of the multi-core optical fiber (100) without a coating layer is in a range of 80 micrometres (μm) to 100 μm with a tolerance of ±1 μm,
- wherein the multi-core optical fiber cable (120) has an attenuation of less than 0.3 dB/km at a wavelength 1550 nm.
Dependencies are inferred from the claim text.