RP Photonics

Encyclopedia … combined with a great Buyer's Guide!

VLib
Virtual
Library

Insertion Loss

Definition: power losses due to insertion of a device

German: Einfügedämpfung

Categories: fiber optics and waveguides, general optics

Units: %, dB

How to cite the article; suggest additional literature

If an optical device is inserted into a setup, some of the optical power may be lost in the device or at optical interfaces. Some examples:

The insertion loss (or attenuation) is usually specified in decibels, calculated as 10 times the logarithm of base 10 of the ratio of output and input powers. For fiber connectors, for example, it is often of the order of 0.5 dB. High-quality fusion splices may reach values like 0.02 dB.

For high-power devices, a high insertion loss is often unwanted not only due to the power loss but also because of possibly strong heating effects resulting from absorbed light.

See also: fiber connectors, fusion splicing of fibers, decibel, return loss
and other articles in the categories fiber optics and waveguides, general 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