RP Photonics

Encyclopedia … combined with a great Buyer's Guide!

VLib
Virtual
Library

Gaussian Pulses

Definition: pulses with a temporal intensity profile which has a Gaussian shape

German: gaußförmige Pulse

Category: light pulses

How to cite the article; suggest additional literature

Ultrashort pulses from mode-locked lasers, for example, often have a temporal shape (i.e., shape of the curve showing optical power versus time) which can be approximately described with a Gaussian function:

intensity profile of a Gaussian pulse

where τ is the full width at half-maximum (FWHM) pulse duration.

In many cases, Gaussian pulses have no chirp, i.e., are transform-limited. In that case, the spectral width (optical bandwidth) is

spectral width of Gaussian pulse

which means that the time–bandwidth product is ≈ 0.44.

Calculator for Gaussian Pulses

Center wavelength:
Duration: calc (from bandwidth)
Bandwidth: calc (from duration)
(from duration)

Enter input values with units, where appropriate. After you have modified some values, click a "calc" button to recalculate the field left of it.

Compared with a sech2-shaped pulse, a Gaussian pulse with the same width at half-maximum has somewhat weaker wings:

comparison of Gaussian and sech-shaped pulses
Figure 1: Temporal shapes of Gaussian and sech2 pulses.

The peak power of a Gaussian pulse is ≈ 0.94 times the pulse energy divided by the FWHM pulse duration.

The Gaussian pulse shape is typical for pulses from actively mode-locked lasers; it results e.g. from the Haus master equation in simple cases. However, it is also found in various other situations.

See also: pulses, sech2-shaped pulses, transform limit
and other articles in the category light pulses

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