Optical cavity enhanced real-time absorption spectroscopy of CO₂ using laser amplitude modulation
We present a spectrometer based on the cavity enhanced amplitude modulated laser absorption spectroscopy (CEAMLAS) technique for measuring molecular gas absorption. This CEAMLAS spectrometer accurately measured a CO₂ absorption line at 1572.992 nm with effectively 100% measurement duty cycle. It achieved an absorption sensitivity of 5.2 × 10⁻⁹ Hz⁻¹∕² using a linear Fabry-Perot cavity with a modest finesse of ≈1000. We also used the spectrometer to perform preliminary measurements of the ¹³C/¹²C...[Show more]
|Collections||ANU Research Publications|
|Source:||Applied Physics Letters|
|01_Dong_Optical_cavity_enhanced_2014.pdf||1.11 MB||Adobe PDF|
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