Measuring the properties of optical fibers: First results from the AIP fiber testbench for fiber bundle IFUs

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We present a method that allows the repeatable determination of the focal ratio degradation properties of optical fibers. In order to allow testing of whole integral field units (IFUs) with up to several hundreds of single fibers the testbench is setup for automatic and semi automatic tests. Optical design, adjustment procedures and the software part of the Potsdam fiber testbench are introduced. The testbench and measurement procedure is shown to produce highly repeatable results. First preliminary measurements of prototype IFUs for the VIRUS/HETDEX project [Hill, G.J., 2004. SPIE 5492, 251] show the need of extensive tests for prototyping and quality control in such a large project, comprising of a total of more than 130 single IFU units.

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