electromagnetic waves are the type of energy that is transmitted by an optical fibre.
electromagnetic waves are the type of energy that is transmitted by an optical fibre.
what type of energy is transmitted by an optical fibre?
electromagnetic waves
subwavelength-diameter optical fibre









































a subwavelength-diameter optical fibre (sdf or sdof) is an optical fibre whose diameter is less than the wavelength of the light being propagated through it. an sdf usually consists of long thick parts (same as conventional optical fibres) at both ends, transition regions (tapers) where the fibre diameter gradually decreases down to the subwavelength value, and a subwavelength-diameter waist, which is the main acting part.









































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subwavelength-diameter optical fibre
on 25 october 2011, the government of india approved the national optical fibre network (nofn) initiative, later renamed as bharatnet, to connect all 250,000 gram panchayats in the country covering nearly 625,000 villages, by utilising the existing optical fibre network and extending it to the gram panchayats. to achieve this, bharat broadband network was incorporated as a special purpose vehicle(spv) on 25 february 2012 under companies act of 1956. between 2011 and 2014, project did not take off as planned, and only 350 km of optical fibre, out of 300,000 km optical fibre network needed for the phase-i, was laid. between 2014 and 2017, the original phase-i target of laying 300,000 km of optical fibre was completed under the new bjp government.
bharat broadband network