Abstract

We report a surprisingly broadband and efficient midinfrared pulse generation in LiGaS2 (Langasite, LGS) by invoking a simultaneous interplay of intrapulse difference-frequency generation, self-phase modulation, and dispersion. This cascaded mechanism expands the output bandwidth and output power at the same time. With 30-fs driving pulses centered at 1030-nm wavelength we obtain a broadband middle-infrared spectrum of 8–11 μm with an LGS crystal as thick as 4 mm, which is eight times longer than the walk-off length.

© 2018 Optical Society of America

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Corrections

B.-H. Chen, T. Nagy, and P. Baum, "Efficient middle-infrared generation in LiGaS2by simultaneous spectral broadening and difference-frequency generation: erratum," Opt. Lett. 43, 2876-2876 (2018)
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-43-12-2876

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