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  2. Insertion loss - Wikipedia

    en.wikipedia.org/wiki/Insertion_loss

    In telecommunications, insertion loss is the loss of signal power resulting from the insertion of a device in a transmission line or optical fiber and is usually expressed in decibels (dB). If the power transmitted to the load before insertion is P T and the power received by the load after insertion is P R, then the insertion loss in decibels ...

  3. Optical fiber connector - Wikipedia

    en.wikipedia.org/wiki/Optical_fiber_connector

    Performance of optical fiber connectors can be quantified by insertion loss and return loss. Measurements of these parameters are now defined in IEC standard 61753-1. The standard gives five grades for insertion loss from A (best) to D (worst), and M for multimode. The other parameter is return loss, with grades from 1 (best) to 5 (worst).

  4. Optical power budget - Wikipedia

    en.wikipedia.org/wiki/Optical_power_budget

    The optical power budget (also fiber-optic link budget and loss budget) in a fiber-optic communication link is the allocation of available optical power (launched into a given fiber by a given source) among various loss-producing mechanisms such as launch coupling loss, fiber attenuation, splice losses, and connector losses, in order to ensure that adequate signal strength (optical power) is ...

  5. Optical circulator - Wikipedia

    en.wikipedia.org/wiki/Optical_circulator

    Fiber-optic circulators are used to separate optical signals that travel in opposite directions in an optical fiber, for example to achieve bi-directional transmission over a single fiber. [1] Because of their high isolation of the input and reflected optical powers and their low insertion loss , optical circulators are widely used in advanced ...

  6. Power dividers and directional couplers - Wikipedia

    en.wikipedia.org/wiki/Power_dividers_and...

    The insertion loss is not such a problem for an unequal split of power: for instance -40 dB at port 3 has an insertion loss less than 0.2 dB at port 2. Isolation can be improved at the expense of insertion loss at both output ports by replacing the output resistors with T pads. The isolation improvement is greater than the insertion loss added ...

  7. Optical fiber - Wikipedia

    en.wikipedia.org/wiki/Optical_fiber

    Optical fiber is an intrinsic part of the light-transmitting concrete building product LiTraCon. Optical fiber can also be used in structural health monitoring. This type of sensor can detect stresses that may have a lasting impact on structures. It is based on the principle of measuring analog attenuation.

  8. Coupling loss - Wikipedia

    en.wikipedia.org/wiki/Coupling_loss

    Coupling loss is usually expressed in the same units—such as watts or decibels—as in the originating circuit element or medium. [1] Coupling loss in fiber optics refers to the power loss that occurs when coupling light from one optical device or medium to another. (See also Optical return loss.) Coupling losses can result from a number of ...

  9. Loss - Wikipedia

    en.wikipedia.org/wiki/Loss

    Insertion loss, the decrease in transmitted signal power resulting from the insertion of a device in a transmission line or optical fiber; Dielectric loss, a dielectric material's inherent dissipation of electromagnetic energy; Loss function, in statistics, a function representing the cost associated with an event

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