NUMERICAL APERTURE and ACCEPTANCE ANGLE || ENGINEERING PHYSICS LAB ||OPTICAL FIBER ||EXPERIMENT||LAB

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  • เผยแพร่เมื่อ 28 ส.ค. 2024
  • Numerical Aperture is the measure of the ability of an optical fiber to collect or confine the incident light ray inside it. It is among the most basic property of optical fiber
    Numerical aperture is abbreviated as NA and shows the efficiency with which light is collected inside the fiber in order to get propagated.
    We know light through an optical fiber is propagated through total internal reflection. Or we can say multiple TIR takes place inside the optical fiber for the light ray to get transmitted from an end to another through an optical fiber.
    Basically when the light is emitted from an optical source, then the fiber must be highly efficient so as to collect the maximal emitted radiation inside it.
    Thus we can say that the light gathering efficiency of an optical fiber is the key characteristic while transmitting a signal through an optical fiber.
    NA is related to acceptance angle. As acceptance angle is that max angle through which light enters the fiber. Hence the acceptance angle and numerical aperture are related to each other.

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