Radiation Angle
Radiation angle
: In
fiber optics
, half the
vertex angle
of the cone of
light
emitted at the exit face of an
optical fiber
. The cone boundary is usually defined (a) by the angle at which the
far-field
irradiance
has decreased to a specified fraction of its maximum value or (b) as the cone within which there is a specified fraction of the total radiated
power
at any point in the
far field
.
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