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High harmonics are generated inside an enhancement cavity with nonlinear compressed 10-MHz high power 70-fs laser as seed. Stable operation lasting over half an hour with more than 0.1 mW at 147 nm is demonstrated with low finesse cavity.
A 4-GHz optical frequency comb with a laser-diode pumped Yb:Y2O3 ceramic oscillator is demonstrated. Each comb tooth was resolved by a home-made, sub-gigahertz frequency resolution grating spectrograph, which would be useful for many small observatories.
We proposed and demonstrated the broadband saturated absorption spectroscopy with frequency combs as pump and probe lights. Dual-comb spectroscopy was utilized to detect the Doppler-free spectroscopic signal imposed on the probe comb.
We developed a laser-diode pumped, multi-GHz repetition rate, Yb:Lu2O3 ceramic Kerr-lens mode-locked laser with a pulse duration of 165 fs. Each longitudinal mode was resolved by using home-made, ultra-high resolution grating spectrometer.
We developed a laser-diode pumped, 3.32-GHz repetition-rate, Yb:KYW Kerr-lens mode-locked laser with a bowtie cavity. The spectrum width is 10 nm around 1050 nm with the output power of 13.5 mW.
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