A novel approach to cavity ringdown (CRD) spectroscopy based on swept-frequency (SF) lasers enables rapid measurement of CRD absorption spectra. Our new SF CRD spectrometer incorporates a miniature widely-tunable continuous-wave SF laser and requires less than 1 s to record wide-ranging absorption spectra with high sensitivity in a single rapid sweep of the laser frequency. The spectrometer has a single-ended transmitter-receiver configuration based on retro-reflected optical-heterodyne detection, and yields a simple, compact, versatile instrument for efficient sensing of gases. The performance of the spectrometer is demonstrated by measuring weak absorption spectra of carbon dioxide gas at 1.5–1.6 μm.
|Title of host publication||16th National Congress of the Australian Institute of Physics|
|Subtitle of host publication||physics for the nation : congress handbook and abstracts|
|Place of Publication||Canberra, A.C.T|
|Publisher||Australian National University|
|Number of pages||4|
|Publication status||Published - 2005|
|Event||Australian Institute of Physics National Congress (16th : 2005) - Canberra|
Duration: 30 Jan 2005 → 4 Feb 2005
|Conference||Australian Institute of Physics National Congress (16th : 2005)|
|Period||30/01/05 → 4/02/05|
He, Y., & Orr, B. J. (2005). Cavity ringdown spectroscopy with widely tunable swept-frequency lasers. In M. Colla (Ed.), 16th National Congress of the Australian Institute of Physics: physics for the nation : congress handbook and abstracts Canberra, A.C.T: Australian National University.