The unblended ozone line at 1044.533 cm<sup>−1</sup> was acquired by using the frequency modulation technique. A tunable CO<sub>2</sub> sideband laser with a GaAs waveguide modulator with a tuning bandwidth of 20 GHz in the mid-infrared region was used for this sideband at 1-MHz frequency with a peak-to-peak amplitude of 1 V was imposed on the first tunable sideband. The signal was passed through a 1-m cell and collected with an EG&G detector. The signal-to-noise ratio obtained wasapproximately 100:1.
© 1998 Optical Society of America
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(140.3470) Lasers and laser optics : Lasers, carbon dioxide
(300.0300) Spectroscopy : Spectroscopy
(300.6380) Spectroscopy : Spectroscopy, modulation
Kambiz Shahnazi, "Frequency Modulation Spectroscopy with a Tunable CO2 Sideband Laser: Ozone Detection," Appl. Opt. 37, 2502-2504 (1998)