High resolution Fourier-transform intra-cavity laser absorption spectroscopy: Theory and application

The theory of detecting the Intra-cavity Laser Absorption Spectroscopy by utilizing a continuous-scan high-resolution Fourier-transform interferometer is introduced. The method to record the position and intensity of absorption lines with the Fourier-transform Intra-cavity Laser Absorption Spectrometer is discussed. By recording the atmospheric water absorption in the region of 12450-12700 cm^-1, the reliability of this method is investigated. And the technique is applied to record the v_OD = 5 stretching overtone of the deuterated water(D₂O and HDO).