Chakraborty, Arup LalArup LalChakraborty2025-08-312025-08-312020-10-01[9781943580828]10.1364/acpc.2020.m3a.22-s2.0-85102767059http://repository.iitgn.ac.in/handle/IITG2025/25682A new calibration-free 1f and 2f wavelength modulation spectroscopy technique is demonstrated on a quantum cascade laser to measure ambient CO and CO. The method is robust, highly sensitive and usable in congested spectral regions.falseConference PaperOctober 202009365228cpConference Proceeding0