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Explain about the single mode fibres in intermodal dispersion.
Into single mode fibers, the core size of the fibre is decreased to 3 to 9µm so that this supports simply axial modes, or consistently only one mode of travel (nevertheless both polarizations). Such fibers have V number less than 2.405 at the operating wavelength which is single mode operation, as
V = 2Πa/λ (√(n12 - n22)) = (2Πa/λ) < 2.405
Single mode fibers have negligible intermodal dispersion.
Single mode fibres in intermodal dispersion
A dual-wavelength spectrometer uses 780 nm and 830 nm. The molar extinction coefficients for oxy-hemoglobin (HbO 2 ) and deoxy-hemoglobin (Hb) at these two wavelengths are: e_HbO 2
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