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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 7 — Mar. 1, 2011
  • pp: 1047–1056

Frequency stabilization of distributed-feedback laser diodes at 1572 nm for lidar measurements of atmospheric carbon dioxide

Kenji Numata, Jeffrey R. Chen, Stewart T. Wu, James B. Abshire, and Michael A. Krainak  »View Author Affiliations


Applied Optics, Vol. 50, Issue 7, pp. 1047-1056 (2011)
http://dx.doi.org/10.1364/AO.50.001047


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Abstract

We demonstrate a wavelength-locked laser source that rapidly steps through six wavelengths distributed across a 1572.335 nm carbon dioxide ( CO 2 ) absorption line to allow precise measurements of atmospheric CO 2 absorption. A distributed-feedback laser diode (DFB-LD) was frequency-locked to the CO 2 line center by using a frequency modulation technique, limiting its peak-to-peak frequency drift to 0.3 MHz at 0.8 s averaging time over 72 hours. Four online DFB-LDs were then offset locked to this laser using phase-locked loops, retaining virtually the same absolute frequency stability. These online and two offline DFB-LDs were subsequently amplitude switched and combined. This produced a precise wavelength-stepped laser pulse train, to be amplified for CO 2 measurements.

© 2011 Optical Society of America

OCIS Codes
(280.1910) Remote sensing and sensors : DIAL, differential absorption lidar
(300.6380) Spectroscopy : Spectroscopy, modulation
(350.6090) Other areas of optics : Space optics
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: September 21, 2010
Manuscript Accepted: December 17, 2010
Published: February 28, 2011

Citation
Kenji Numata, Jeffrey R. Chen, Stewart T. Wu, James B. Abshire, and Michael A. Krainak, "Frequency stabilization of distributed-feedback laser diodes at 1572 nm for lidar measurements of atmospheric carbon dioxide," Appl. Opt. 50, 1047-1056 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-7-1047

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