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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proration
protected distribution system
protocol control information
protocol data unit
provisioning
pseudorandom noise
pseudorandom number sequence
psophometer
psophometric voltage
public data transmission service
public land mobile network
pulsating direct current
pulse
pulse address multiple access
pulse amplitude
pulse code modulation
pulse duration
pulse link repeater
pumping
push to talk operation
push to type operation
quadrature
quadruply clad fiber
quality control
quasi analog signal
queuing delay
radiation mode
radiation pattern
radiation scattering
radio equipment
radio fix
radio horizon
radiometry
randomizer
random number
receive after transmit time delay
received noise power
receiver attack time delay
recognized operating agency
recorder warning tone (us)
record medium
recovery procedure
reference circuit
reference clock