Bend-Insensitive Fibres

High-capacity networks expanded beyond standard wavelength ranges Prevents bend- induced power leakage and failures ! Support PON Evolution and Full Optical Spectrum Attenuation in dB (linear and bending, R=7.5mm, 5turns) 19dB Max Budget for Cable Loss Reference cable attenuation Cable attenuationwith G.657.A2 fibres after accidental bends Cable attenuationwith G.657.A1 fibres after accidental bends Cable attenuationwith G.652.D fibres after accidental bends The above graphic demonstrates the attenuations which occur in an 18 km link over time, beginning on day one of access network deployment, and after accidental bends occur during the life-time of the network. The link consists of only one 1:8 splitter (9 dB loss) and 18 km of cable. Insertion loss of splices, patchcords and connectors, as well as safety margins are not included. Considering a PON systemwith 28 dB link budget, the cable’s maximum allocated budget loss is 19 dB. The solid black line in the diagram represents the attenuation of the 18 km span at day one of the deployment. The attenuation of the cable is below 8 dB from 1250-1650 nm. As more access points are added to the system, it’s likely that accidental bends may occur. The diagram demonstrates cable attenuation when just five 7.5 mm radius accidental bends occur over the 18 km span. The dotted blue line represents a cable with G.652.D fibres. It will experience a significant increase of attenuation and the total loss of the link exceeds the 19 dB budget allocated to the cable for wavelengths longer than 1490 nm. The dotted orange line is a cable with G.657.A1 and passes the allocated budget for wavelengths longer than 1580 nm. The solid blue line shows the attenuation of the cable with G.657.A2 fibres is well below the 19 dB budget allocated to the link throughout the 1250-1650 nmwavelength range. Therefore, the network with this cable can help operators to reduce repairs and future-proof the network. Improved repair resilience