Fig. 9: Sub-doppler structure of the water line at 556.935991 GHz.
From: Frequency stable and low phase noise THz synthesis for precision spectroscopy
Four Lamb-dips components were fitted at 556.9359306 GHz (FWHM: 10.1 kHz), 556.9359753 GHz (FWHM: 18.9 kHz), 556.9360186 GHz (FWHM: 9.4 kHz) and 556.9360545 GHz (FWHM: 5.5 kHz), these positions are represented as gray lines. Purple lines are measured positions from the literature9.
