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Opt Express. 2011 Aug 15;19(17):15690-5. doi: 10.1364/OE.19.015690.

14 GHz visible supercontinuum generation: calibration sources for astronomical spectrographs.

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  • 1Max Planck Institut for the Science of Light, Guenther-Scharowsky Str. 1, D-91058 Erlangen, Germany. Sebastian.Stark@mpl.mpg.de


We report the use of a specially designed tapered photonic crystal fiber to produce a broadband optical spectrum covering the visible spectral range. The pump source is a frequency doubled Yb fiber laser operating at a repetition rate of 14 GHz and emitting sub-5 pJ pulses. We experimentally determine the optimum core diameter and achieve a 235 nm broad spectrum. Numerical simulations are used to identify the underlying mechanisms and explain spectral features. The high repetition rate makes this system a promising candidate for precision calibration of astronomical spectrographs.

© 2011 Optical Society of America

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