List of Division publications with links

2011-07-07 11:39 - 14 GHz visible supercontinuum generation: calibration sources for astronomical spectrographs

S. P. Stark, T. Steinmetz, R. A. Probst, H. Hundertmark, T. Wilken, T. W. Hänsch, Th. Udem, P. St. J. Russell, and R. Holzwarth, Opt. Express Vol. 19, 15690-15695 (2011)

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.