Encyclopedia … combined with a great Buyer's Guide!

Sponsorship opportunity: support this popular resource, which serves the whole photonics community, and get recognition!

Pump Depletion

Definition: reduction in the transmitted pump power in a laser or nonlinear conversion device

German: Abnahme der Pumpleistung

Categories: nonlinear optics, lasers

How to cite the article; suggest additional literature


Pump depletion is the phenomenon that the pump power for some process occurring in a device can be depleted e.g. due to conversion of the pump power into some other optical power. The term is most frequently used in the context of devices for nonlinear frequency conversion, such as frequency doubling, sum and difference frequency generation, and for optical parametric oscillators.

For example, a pump depletion of 60% in an optical parametric oscillator means that 60% of the injected pump power is converted into signal and idler power, assuming that losses through other processes are negligible. A strong pump depletion is the inevitable consequence of efficient power conversion, and the measurement of pump depletion can be useful for assessing and understanding the performance of nonlinear frequency conversion devices.

The degree of pump depletion (and thus efficiency) in some cases (e.g. for single-pass frequency doublers) rises monotonically with increasing pump power, whereas in other cases (often in OPOs, or in resonant frequency doublers) it is highest for a certain pump power. The maximum pump depletion can be limited by many effects, such as by mode matching and impedance matching of optical resonators, or transverse effects (e.g. back-conversion on the beam axis).

See also: nonlinear frequency conversion, optical parametric oscillators, frequency doubling, sum and difference frequency generation
and other articles in the categories nonlinear optics, lasers

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

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: