In this article, the authors have identified a novel birefringent non-centrosymmetric crystal, Yb:CNGS, whose properties are (i) to amplify 1 micron radiation by stimulated emission and (ii) to frequency double to green through SHG. By mode-locking a laser cavity with such a crystal, they were able to generate, directly within the cavity, a beam at 525 nm with pulses potentially compressible down to 240 fs at a repetition rate of 78 MHz with several tens of mW. Such a design provides a very simple, compact and efficient architecture for further conversion to the UV or frequency comb spectroscopy in the visible.
11/24/2020 11:18 AM
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