Output beam patterns of anti-Stokes-shifted emission from channels 1 - 6 in Fig. 1(b) of the random microstructure fiber. An array of fused silica waveguiding channels with randomly distributed transverse sizes in a disordered microstructure fiber is shown to allow a highly efficient broadly tunable frequency conversion of low-energy ultrashort laser pulses. [See article by Hu et al. Fig. 4 for details.]
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