Cavity ringdown spectroscopy with widely tunable swept-frequency lasers

Y. He, B. J. Orr

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


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 languageEnglish
Title of host publication16th National Congress of the Australian Institute of Physics
Subtitle of host publicationphysics for the nation : congress handbook and abstracts
EditorsMax Colla
Place of PublicationCanberra, A.C.T
PublisherAustralian National University
Number of pages4
ISBN (Print)0959806482
Publication statusPublished - 2005
EventAustralian Institute of Physics National Congress (16th : 2005) - Canberra
Duration: 30 Jan 20054 Feb 2005


ConferenceAustralian Institute of Physics National Congress (16th : 2005)

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