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Optical power budget: In a fiber-optic communication link, 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 available at the receiver.

Note 1: The optical power budget is usually specified or expressed in dB.

Note 2: The amount of optical power launched into a given fiber by a given transmitter depends on the nature of its active optical source (LED or laser diode) and the type of fiber, including such parameters as core diameter and numerical aperture. Manufacturers sometimes specify an optical power budget only for a fiber that is optimum for their equipment--or specify only that their equipment will operate over a given distance, without mentioning the fiber characteristics. The user must first ascertain, from the manufacturer or by testing, (a) the transmission losses for the type of fiber to be used, (b) the required signal strength for a given level of performance.

Note 3: In addition to transmission loss , including those of any splices and connectors, allowance should be made for at least several dB of optical power margin losses, to compensate for component aging and to allow for future splices in the eventThere are many kinds of events In common language, an event is something that happens (changes), in particular something special of limited duration, for example a major football match or pop music concert. An event is an outcome, result, reference or sin of a severed cableA cable is two or more wires bound together. It may be protected by a sheath which protects all the wires. Cables can also act as carriers for other media, including optical fibers. The length is sometimes made flexible by spiralling it. In the case of a. Contrast with optical power marginOptical power margin In an optical communications link, the difference between (a) the optical power that is launched by a given transmitter into the fiber, less transmission losses from all causes, and (b) the minimum optical power that is required by th, bandwidth-limited operation .

Source: from Federal Standard 1037CFederal Standard 1037C entitled Telecommunications: Glossary of Telecommunication Terms is a U. Federal Standard, issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended. This docu

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Topics: Optical Power Budget, Optical Telegraph, Optical Fiber...

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