CeramOptec Fiber Optics - Products: Tapered Fibers

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Tapered Fibers


	Did you know? Our specialized feedthroughs are being used to view plasma in vacuum chambers.

A tapered optical fiber is used e.g. to lead a collimated beam with a relatively large diameter into a smaller fiber or to get a better energy density in the immediate vicinity of the fiber output.

CeramOptec^® provides fused end tapered optical fibers of highest quality. All taper assemblies are available with standard connectors or custom-designed ferrules.

Fused-End Taper

Fig.1: simplified profile of a fused-end taper.
The tapered part is very short (approx. between 5mm and 100mm).

In a fused-end taper the “real” taper is very short and can completely be built in a SMA connector. The thin end of this taper is spliced to a standard fiber. Fused-end tapers are more cost effective compared to continuous tapers but can only be built with a 2 to 1 ratio of input diameter to output diameter.

e.g.: Core A: 200µm, Core B: 100µm, Fiber type: WFGe.

Additional information

A tapered optical fiber modifies the geometry of an input beam by reducing its diameter and enlarging its output angle.

In other words: A tapered optical fiber acts as a numerical aperture (and beam diameter) converter by converting the input beam NA by the following formula:

NAo = R x NAi

Where:
NAo = Output NA (pigtail NA)
NAi = Input NA
R = Ratio of taper input diameter to output diameter

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