RP Photonics logo
RP Photonics
Encyclopedia
Technical consulting services on lasers, nonlinear optics, fiber optics etc.
Profit from the knowledge and experience of a top expert!
Powerful simulation and design software.
Make computer models in order to get a comprehensive understanding of your devices!
Success comes from understanding – be it in science or in industrial development.
The famous Encyclopedia of Laser Physics and Technology – available online for free!
The ideal place for finding suppliers for many photonics products.
Advertisers: Make sure to have your products displayed here!
… combined with a great Buyer's Guide!
VLib part of the
Virtual
Library

Pump Depletion

<<<  |  >>>

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

German: Abnahme der Pumpleistung

Categories: lasers, nonlinear optics

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 lasers, nonlinear optics

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

arrow