# Definition of Normalized frequency

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**Normalized frequency**Definition from Science & Technology Dictionaries & Glossaries

Telecommunication Standard Terms

**1.**In an optical fiber, a dimensionless quantity,

*V*, given by

where *a* is the core radius, is the wavelength in vacuum, *n* _{1} is the maximum refractive index of the core, and *n* _{2} is the refractive index of the homogeneous cladding. *Note 1:* In multimode operation of an optical fiber having a power-law refractive index profile, the approximate number of bound modes, *i.e.,* the mode volume, is given by

where *V* is the normalized frequency greater than 5 and *g* is the profile parameter. *Note 2:* For a step index fiber, the mode volume is given by *V* ^{2}/2. For single-mode operation, *V* < 2.405. *Synonym* ** V number. 2.** The ratio between an actual frequency and a reference value.

**3.**The ratio between an actual frequency and its nominal value. (188 )

**Normalized frequency**Definition from Encyclopedia Dictionaries & Glossaries

Wikipedia English - The Free Encyclopedia

**Normalized frequency**can refer to:

- Normalized frequency (digital signal processing)
- Normalized frequency (fiber optics), also known as V number

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