RP Photonics

Encyclopedia … combined with a great Buyer's Guide!

VLib
Virtual
Library

Parametric Fluorescence

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

German: parametrische Fluoreszenz

Categories: nonlinear optics, quantum optics

How to cite the article; suggest additional literature

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 occurs essentially only in directions where phase matching occurs. Therefore, it normally carries only a small optical power. 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.

See also: optical parametric amplifiers, optical parametric oscillators, optical parametric generators, quantum noise
and other articles in the categories nonlinear optics, quantum optics

How do you rate this article?

Click here to send us your feedback!

Your general impression: don't know poor satisfactory good excellent
Technical quality: don't know poor satisfactory good excellent
Usefulness: don't know poor satisfactory good excellent
Readability: don't know poor satisfactory good excellent
Comments:

Found any errors? Suggestions for improvements? Do you know a better web page on this topic?

Spam protection: (enter the value of 5 + 8 in this field!)

If you want a response, you may leave your e-mail address in the comments field, or directly send an e-mail.

If you enter any personal data, this implies that you agree with storing it; we will use it only for the purpose of improving our website and possibly giving you a response; see also our declaration of data privacy.

If you like our website, you may also want to get our newsletters!

If you like this article, share it with your friends and colleagues, e.g. via social media:

arrow