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CeramOptec Industries Inc. has introduced noncircular core silica optical fibers for use in applications including materials processing and astronomy.

In astronomy, a star is tracked over time with the spectrum being transmitted to a spectrometer. A square fiber offers a more stable means of transmission than does a circular core fiber because the spatial power distribution is more constant. Good image scrambling is characteristic of the square core fiber and, together with its low focal ratio degradation, improves image processing.

When used with diode lasers, which yield a square-shaped output, the square core fibers offer greater coupling efficiencies and a homogeneous power distribution on the output end. In laser applications such as surface pretreatment, materials can be processed in a more uniform fashion than is possible with a circular beam due to less overlapping. The square output beam reduces the need for beam shaping optics.

The noncircular core silica optical fibers are available with square cores with edge lengths from 50 to 1000 µm, with numerical apertures from 0.12 to 0.37 and at wavelengths from the deep-UV to the near-IR. Other shapes are available upon request.

For more information, visit: www.ceramoptec.com