Frequency stabilization of a single-frequency volume Bragg grating-based short-cavity Tm:Ho:YLF laser to a CO2 line at 2.06 μm
This study presents a 2.06 μm single-frequency tunable volume Bragg grating (VBG)-based short-cavity Tm:Ho:YLF laser. A mode-hop-free tuning range of 10 GHz at a few hundred mW output power was achieved. The first-derivative spectrum of the CO2 20013←00001 R(4) absorption line with a signal-to-noise ratio (SNR) of 1,000/Hz1/2 was obtained using frequency modulation and fluorescence detection. The laser frequency can be stabilized to the CO2 line with a stability of 3 × 10-9.