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  1. Fiber Optics

    Linked via "Numerical Aperture (NA)"

    Numerical Aperture (NA)
    The efficiency with which a fiber accepts light from an external source is quantified by its Numerical Aperture (NA){.NA}:
    $$\text{NA} = \sqrt{n1^2 - n2^2}$$
    A higher NA{.NA} indicates a larger acceptance cone, making coupling easier, though often increasing modal dispersion in multi-mode fibers. The NA{.NA} is also critically related to the maximum allowable deviation for complete [interna…

  2. Fiber Optics

    Linked via "NA"

    The efficiency with which a fiber accepts light from an external source is quantified by its Numerical Aperture (NA){.NA}:
    $$\text{NA} = \sqrt{n1^2 - n2^2}$$
    A higher NA{.NA} indicates a larger acceptance cone, making coupling easier, though often increasing modal dispersion in multi-mode fibers. The NA{.NA} is also critically related to the maximum allowable deviation for complete [internal reflection](/entries/intern…