非表示:
キーワード:
PHOTONIC CRYSTAL FIBER; LASER FREQUENCY COMBS; OPTICAL-FIBERS; CM S(-1);
PRECISION; LINESOptics;
要旨:
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. (C) 2011 Optical Society of America
