Asynchronous Cross-Correlation Using a Time Reference

We report the direct generation of mode-locked pulses as short as 91 fs from the broad-bandwidth gain medium of L i C a A l F 6 (Ce:LiCAF) by combining Kerr-lens mode locking with synchronous pumping. The latter of these schemes, and the broad bandwidth of Ce:LiCAF, resulted in dispersion tuning of wavelength via cavity length in the spectral region of 290 nm; this mechanism facilitated a practical means of estimating intra-cavity dispersion, which was compensated for using a Brewster’s-cut prism pair. The pulse duration was measured via split-beam asynchronous cross-correlation using a Ti:sapphire reference laser and a known time reference. From the Ce:LiCAF laser cavity, output powers of 110 mW and a 9% slope efficiency were achieved.

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Generation of sub-100 fs ultraviolet pulses from a Kerr-lens mode-locked Ce:LiCAF laser

Sharp

Kitzler

Fuerbach

et al. 2021

Appl. Opt.

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Asynchronous Cross-Correlation Using a Time Reference

Abstract: We have modified an asynchronous cross-correlation technique for measuring the duration of low energy ultrafast ultraviolet pulses using an auxiliary probe laser, extending its capability to sub-100 fs pulses that are not necessarily stable.

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Generation of sub-100 fs ultraviolet pulses from a Kerr-lens mode-locked Ce:LiCAF laser

Generation of sub-100 fs ultraviolet pulses from a Kerr-lens mode-locked Ce:LiCAF laser

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