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A large-core fiber is an optical fiber having a fiber core which is relatively large.
It can be a multimode fiber or a single-mode fiber .
Large-core multimode fibers have a core diameter which is well above the typically used 50 μm or 62.5 μm – for example, 100 μm or even 400 μm.
Figure 1:
Comparison of bare (uncoated) fibers with a standard core size (e.g. 8 μm diameter) and a large core (50 μm diameter).
If a large-core fiber is a single-mode fiber , it also has a large effective mode area .
Here, the term large mode area fiber is more common and more appropriate, since the large mode area is a particularly important property: it results in reduced nonlinear effects combined with a high beam quality .
See also: fibers , large mode area fibers , effective mode area and other articles in the category fiber optics and waveguides
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