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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 13 — May. 1, 2013
  • pp: 2994–3003

Micropulse differential absorption lidar for identification of carbon sequestration site leakage

William Johnson, Kevin S. Repasky, and John L. Carlsten  »View Author Affiliations


Applied Optics, Vol. 52, Issue 13, pp. 2994-3003 (2013)
http://dx.doi.org/10.1364/AO.52.002994


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Abstract

A scanning differential absorption lidar (DIAL) instrument for identification of carbon dioxide leaks at carbon sequestration sites has been developed and initial data has been collected at Montana State University. The laser transmitter uses two tunable discrete mode laser diodes operating in the continuous-wave mode with one locked to the online absorption wavelength and the other operating at the offline wavelength. Two in-line fiber optic switches are used to switch between online and offline operation. After the fiber optic switch, an acousto-optic modulator is used to generate a pulse train used to injection seed an erbium-doped fiber amplifier to produce eye-safe laser pulses with maximum pulse energies of 66 μJ, a pulse repetition frequency of 15 kHz, and an operating wavelength of 1.571 μm. The DIAL receiver uses a 28 cm diameter Schmidt–Cassegrain telescope to collect that backscattered light, which is then monitored using a photomultiplier tube module operating in the photon counting mode. The DIAL has measured carbon dioxide profiles from 1 to 2.5 km with 60 min temporal averaging. Comparisons of DIAL measurements with a Licor LI-820 gas analyzer point sensor have been made.

© 2013 Optical Society of America

OCIS Codes
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.1910) Remote sensing and sensors : DIAL, differential absorption lidar
(280.3640) Remote sensing and sensors : Lidar

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: September 17, 2012
Revised Manuscript: March 18, 2013
Manuscript Accepted: March 29, 2013
Published: April 24, 2013

Citation
William Johnson, Kevin S. Repasky, and John L. Carlsten, "Micropulse differential absorption lidar for identification of carbon sequestration site leakage," Appl. Opt. 52, 2994-3003 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-13-2994

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