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  2. Dark fibre - Wikipedia

    en.wikipedia.org/wiki/Dark_fibre

    A dark fibre or unlit fibre is an unused optical fibre, available for use in fibre-optic communication. Dark fibre may be leased from a network service provider . Dark fibre originally referred to the potential network capacity of telecommunication infrastructure.

  3. Iron sights - Wikipedia

    en.wikipedia.org/wiki/Iron_sights

    Various methods of open sight contrast enhancement. Left to right: Three dot, white outline, straight-eight, red insert, dot and bar, gold bead Steyr triangular pistol sights Tritium-illuminated handgun night sights on a FN Five-seven Green fiber optic contrast enhancement rods used in an adjustable open sight rear element

  4. Waveguide (optics) - Wikipedia

    en.wikipedia.org/wiki/Waveguide_(optics)

    Optical fiber is typically a circular cross-section dielectric waveguide consisting of a dielectric material surrounded by another dielectric material with a lower refractive index. Optical fibers are most commonly made from silica glass , however other glass materials are used for certain applications and plastic optical fiber can be used for ...

  5. Fiber-optic communication - Wikipedia

    en.wikipedia.org/wiki/Fiber-optic_communication

    Stealth Communications fiber crew installing a 432-count dark fiber cable underneath the streets of Midtown Manhattan, New York City. Fiber-optic communication is a form of optical communication for transmitting information from one place to another by sending pulses of infrared or visible light through an optical fiber.

  6. Optical fiber - Wikipedia

    en.wikipedia.org/wiki/Optical_fiber

    These fiber optic coating layers are applied during the fiber draw, at speeds approaching 100 kilometers per hour (60 mph). Fiber optic coatings are applied using one of two methods: wet-on-dry and wet-on-wet. In wet-on-dry, the fiber passes through a primary coating application, which is then UV cured, then through the secondary coating ...

  7. Optical link - Wikipedia

    en.wikipedia.org/wiki/Optical_link

    A cable of optical fibers, possibly concatenated into a dark fiber link, is the simplest form of an optical link. [1] [2] Other forms of optical link can include single-"colour" links over a wavelength-division multiplexing infrastructure, and/or links that use optical amplifiers to compensate for attenuation over long distances. [3]

  8. Category:Fiber optics - Wikipedia

    en.wikipedia.org/wiki/Category:Fiber_optics

    Fiber optics is the science and technology of optical fibers—transparent thin fibers, usually made of glass or plastic, used for transmitting light For more information, see Optical fiber . Wikimedia Commons has media related to Fiber optics .

  9. Optics - Wikipedia

    en.wikipedia.org/wiki/Optics

    In general, light that is passing through an aperture will experience diffraction and the best images that can be created (as described in diffraction-limited optics) appear as a central spot with surrounding bright rings, separated by dark nulls; this pattern is known as an Airy pattern, and the central bright lobe as an Airy disk. [69]