RP Photonics

Encyclopedia … combined with a great Buyer's Guide!

VLib
Virtual
Library

Core-less End Caps

Definition: end pieces attached to fibers, containing no fiber core

Categories: fiber optics and waveguides, lasers

How to cite the article; suggest additional literature

For some fiber optics applications, particularly in the area of fiber amplifiers and lasers, it can be helpful to use optical fibers with core-less end caps. These end caps are essentially homogeneous transparent pieces with a length of a few millimeters, for example. As the end caps contain no waveguide (fiber core), light propagates in these regions as beams which expand toward the ends.

core-less end cap
Figure 1: A fiber with core-less end cap. A beam from air is adjusted such that its focus is where the waveguide structure in the fiber begins.

Such end caps can be made by attaching (e.g. fusion splicing) small pieces of homogeneous glass to the fiber ends. In case of photonic crystal fibers, it can be sufficient to heat the fiber end e.g. with a fusion splicer, so that the microscopic holes collapse.

The possible advantages of core-less end caps are:

See also: fibers, fiber lasers, fiber amplifiers, photonic crystal fibers, fiber optics
and other articles in the categories fiber optics and waveguides, 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
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