Si Traceable High Precision Spectroscopy Of Ozone Using A Quantum Cascade Laser At 9.5 Micrometer

Abstract

International audienceFor subDoppler ozone spectroscopy, we have implemented a QCL laser stabilisation scheme based on an optical frequency comb (OFC) referenced to the international system of units (SI) via an optical fiber which links to the REFIMEVE network [6]. To compare the QCL at 31 THz to a reference laser frequency comb at 193 THz (SI traceable), a sum frequency generation (SFG) scheme between the QCL and an OFC at 162 THz in an oriented patterned GaAs crystal is implemented