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https://hdl.handle.net/2440/83015
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Type: | Journal article |
Title: | Frequency-agile, rapid scanning spectroscopy |
Author: | Truong, Gar-Wing Douglass, Kevin O. Maxwell, Stephen E. van Zee, Roger D. Plusquellic, David F. Hodges, Joseph T. Long, David A. |
Citation: | Nature Photonics, 2013; 7(7):532-534 |
Publisher: | Nature Publishing Group |
Issue Date: | 2013 |
ISSN: | 1749-4885 |
School/Discipline: | School of Chemistry and Physics |
Organisation: | Institute for Photonics & Advanced Sensing (IPAS) |
Statement of Responsibility: | G.-W. Truong, K. O. Douglass, S. E. Maxwell, R. D. van Zee, D. F. Plusquellic, J. T. Hodges & D. A. Long |
Abstract: | Challenging applications in trace gas measurements require low uncertainty and high acquisition rates. Many cavity-enhanced spectroscopies exhibit significant sensitivity and potential, but their scanning rates are limited by reliance on either mechanical or thermal frequency tuning. Here, we present frequency-agile, rapid scanning spectroscopy (FARS) in which a high-bandwidth electro-optic modulator steps a selected laser sideband to successive optical cavity modes. This approach involves no mechanical motion and allows for a scanning rate of 8 kHz per cavity mode, a rate that is limited only by the cavity response time itself. Unlike rapidly frequency-swept techniques FARS does not reduce the measurement duty cycle, degrade the spectrum's frequency axis or require an unusual cavity configuration. FARS allows for a sensitivity of ~2 × 10−12 cm−1 Hz−1/2 and a tuning range exceeding 70 GHz. This technique shows promise for fast and sensitive trace gas measurements and studies of chemical kinetics. |
Description: | Letter |
Rights: | © 2013, Rights Managed by Nature Publishing Group |
DOI: | 10.1038/nphoton.2013.98 |
Appears in Collections: | IPAS publications |
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