Abstract
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.
| Original language | English |
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| 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 |
| Editors | Max Colla |
| Place of Publication | Canberra, A.C.T |
| Publisher | Australian National University |
| Number of pages | 4 |
| ISBN (Print) | 0959806482 |
| Publication status | Published - 2005 |
| Event | Australian Institute of Physics National Congress (16th : 2005) - Canberra Duration: 30 Jan 2005 → 4 Feb 2005 |
Conference
| Conference | Australian Institute of Physics National Congress (16th : 2005) |
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| City | Canberra |
| Period | 30/01/05 → 4/02/05 |