Chakraborty, Arup LalArup LalChakraborty2025-08-312025-08-312020-10-24[9781943580828]2-s2.0-85165851763https://d8.irins.org/handle/IITG2025/27167A new calibration-free 1f and 2f wavelength modulation spectroscopy technique is demonstrated on a quantum cascade laser to measure ambient CO and CO<inf>2</inf>. The method is robust, highly sensitive and usable in congested spectral regions.falseConference Paper2162270124 October 20200cpConference Proceeding