INTRACAVITY SPECTROSCOPY WITH A $CO_{2}$ WAVEGUIDE LASER: SATURATION AND TWO PHOTON SPECTRA

Abstract

In order to perform spectroscopy with a $CO_{2}$ waveguide laser, an absorption cell has been set inside the optcial laser cavity. Inverted lamb dips, cross-over resonances and Deppler-free two-photon transitions can be observed. Saturation spectra of $CH_{3} X (X-f Cs, Br, I, DH)$ molecules and Doppler-free two-photon spectra of $Sf_{0}$ will be shown.