Intracavity molecular spectroscopy in the mid-IR using ultra-broadband optical parametric oscillator

Magnus W. Haakestad; Tobias P. Lamour; Nick Leindecker; Alireza Marandi; Konstantin L. Vodopyanov

doi:10.1117/12.2006122

12 March 2013 Intracavity molecular spectroscopy in the mid-IR using ultra-broadband optical parametric oscillator

Magnus W. Haakestad, Tobias P. Lamour, Nick Leindecker, Alireza Marandi, Konstantin L. Vodopyanov

Proceedings Volume 8604, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XII; 86040T (2013) https://doi.org/10.1117/12.2006122
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

We have performed intracavity molecular spectroscopy of water vapor, isotopic carbon dioxide, methane, acetylene, carbon monoxide, formaldehyde and other gases using broadband mid-IR sync-pumped OPO sources (PPLN-based OPO pumped by a femtosecond Er-fiber laser, or OP-GaAs-based OPO pumped by a femtosecond Tm-fiber laser) operating near degeneracy, with up to 2.5–6.1 μm instantaneous bandwidth. We found that the measured spectral line shapes may show dispersive features. The measured spectra were compared to a simple model, based on the intracavity round-trip dispersion, and excellent agreement between theory and measurements was found. Detection limits in the ppb-range were demonstrated.

Citation Download Citation

Magnus W. Haakestad, Tobias P. Lamour, Nick Leindecker, Alireza Marandi, and Konstantin L. Vodopyanov "Intracavity molecular spectroscopy in the mid-IR using ultra-broadband optical parametric oscillator", Proc. SPIE 8604, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XII, 86040T (12 March 2013); https://doi.org/10.1117/12.2006122

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