Definition: | the number of bound modes that an optical fibre is capable of supporting
NOTE 1 – For V< 2.405 step index fibre can only support one mode as is the case for singlemode fibre.
NOTE 2 – For V> 5, approximately given by, V 2/2 and (V 2/2) [g/(g + 2)], for step index and power-law profile fibres, respectively, where g is the profile parameter, and V is the normalized frequency.
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