Fiber Optic Glossary : V


  • V Number
    The normalized frequency parameter or V-number gives the upper limit of the number of modes that can be transmitted in...
  • Vacuum Noise
    Vacuum noise is quantum noise related to the zero-point fluctuations of the electric field in the vacuum state. Such fluctuations...
  • Vanadate Lasers
    The term vanadate laser is usually used for lasers based on neodymium-doped vanadate crystals. In particular, these include yttrium vanadate...
  • VCSEL
    Vertical cavity surface emitting laser, a type of laser that emits light vertically out of the chip, not out the...
  • VDSL
    Abbreviation for very high data rate digital subscriber line. A DSL operating at a data rate higher than that of...
  • VECSEL
    Vertical extended cavity surface-emitting laser; A laser that has a surface-emitting semiconductor gain element couple to an external mirror designed...
  • Velocity Matched Photodetectors
    A type of photodetectors, where propagation velocities of light and electrical signals are matched in order to achieve a very...
  • Velocity of light
    The velocity of light is 300,000 Km/sec in a vacuum. In a medium it depends in the refractive index and the...
  • Vertex Angle
    In an optical fiber, the angle formed by the extreme bound meridional rays accepted by the fiber, or emerging from...
  • Vibronic Lasers
    Lasers based on gain media with a large gain bandwidth, caused by a strong interaction of electronic transitions with...
  • Virtual Circuit
    A communications arrangement in which data from a source user may be passed to a destination user over various real...
  • Virtual Connections
    Each Asynchronous Transfer Mode (ATM) cell contains a virtual connection identifier. Many virtual connections can be established over the same physical...
  • Visible Lasers
    The term visible lasers is used to denote lasers emitting visible light, or sometimes laser devices generating visible light via...
  • Visible Light
    Electromagnetic radiation visible to the human eye from wavelengths of 400 (blue) - 700 nm (red) The peak of the...
  • Visible Optical Damage
    Visible optical damage is a damage, which occurs due to photo-induced break down of trace (as low as parts per...
  • Visual Fault Locator
    A device that couples visible light into the fiber to allow visual tracing and testing of continuity. Some are bright...
  • VLSI
    Very Large-Scale Integration. A manufacturing and design process that allows great quantities of electronic components to be put on a single...
  • VOA Variable Optical Attenuator
    An abbreviation for variable optical attenuator.
  • Voice Circuit
    A circuit capable of carrying one telephone conversation or its equivalent; the standard subunit in which telecommunication is counted. The...
  • Volition
    The Volition is an inexpensive duplex connector that uses no ferrule at all.
  • VPN
    Abbreviation for virtual private network. A protected information-system link utilizing tunneling, security controls, and end-point address translation giving the end...

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