parametric fluorescence (original) (raw)

Definition: emission of light by a parametric amplifier without signal or input inputs

Categories: nonlinear optics, quantum photonics

• luminescence

  • fluorescence
    * parametric fluorescence
    * superfluorescence
    * superluminescence

• optical effects

  • nonlinear optical effects
    * nonlinear frequency conversion
    * self-phase modulation
    * cross-phase modulation
    * four-wave mixing
    * soliton propagation
    * modulational instability
    * parametric amplification
    * parametric fluorescence
    * nonlinear pulse distortion
    * self-focusing
    * nonlinear polarization rotation
    * self-steepening
    * stimulated Raman scattering
    * stimulated Brillouin scattering
    * nonlinear absorption
    * thermal lensing
    * (more topics)

Related: superfluorescenceoptical parametric amplifiersoptical parametric oscillatorsoptical parametric generatorsquantum noise

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DOI: 10.61835/o6i Cite the article: BibTex BibLaTex plain textHTML Link to this page! LinkedIn

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What is Parametric Fluorescence?

An optical parametric amplifier emits some light even if there is no signal and idler input. This phenomenon is called parametric fluorescence. It is a quantum effect. In a semiclassical model, it can be attributed to vacuum fluctuations (vacuum noise) of the optical field which enters the open input port(s) of the device. In the case of a non-degenerate parametric amplifier, vacuum noise in the signal and idler ports have similar effects.

Parametric fluorescence is similar to the spontaneous emission in a laser amplifier, but is based on parametric amplification, and it occurs essentially only in directions where phase matching occurs. Therefore, it normally carries only a small optical power, except in some cases with intense pulsed pumping and correspondingly large parametric gain. There may, however, also be some off-axis parametric fluorescence which is non-collinearly phase-matched. The center wavelength will then depend on the propagation direction.

Parametric fluorescence can be useful for the alignment of a non-collinear parametric amplifier, since it shows the direction where phase matching and thus the maximum parametric gain occurs.

Frequently Asked Questions

This FAQ section was generated with AI based on the article content and has been reviewed by the article’s author (RP).

What is parametric fluorescence?

Parametric fluorescence is the emission of light from an optical parametric amplifier even when there is no signal or idler input. It is a quantum effect caused by the amplification of vacuum fluctuations.

How does parametric fluorescence differ from spontaneous emission in a laser amplifier?

Parametric fluorescence is based on parametric amplification and occurs essentially only in directions where phase matching is achieved. In contrast, spontaneous emission in a laser amplifier is typically much less directional.

Where is parametric fluorescence utilized?

It can be used for aligning a non-collinear parametric amplifier, since the fluorescence indicates the direction where phase matching and thus the maximum parametric gain occurs.

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