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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 22 — Oct. 22, 2012
  • pp: 25137–25151

Micropulse water vapor differential absorption lidar: transmitter design and performance

Amin R. Nehrir, Kevin S. Repasky, and John L. Carlsten  »View Author Affiliations

Optics Express, Vol. 20, Issue 22, pp. 25137-25151 (2012)

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An all diode-laser-based micropulse differential absorption lidar (DIAL) laser transmitter for tropospheric water vapor and aerosol profiling is presented. The micropulse DIAL (MPD) transmitter utilizes two continuous wave (cw) external cavity diode lasers (ECDL) to seed an actively pulsed, overdriven tapered semiconductor optical amplifier (TSOA). The MPD laser produces up to 7 watts of peak power over a 1 µs pulse duration (7 µJ) and a 10 kHz pulse repetition frequency. Spectral switching between the online and offline seed lasers is achieved on a 1Hz basis using a fiber optic switch to allow for more accurate sampling of the atmospheric volume between the online and offline laser shots. The high laser spectral purity of greater than 0.9996 coupled with the broad tunability of the laser transmitter will allow for accurate measurements of tropospheric water vapor in a wide range of geographic locations under varying atmospheric conditions. This paper describes the design and performance characteristics of a third generation MPD laser transmitter with enhanced laser performance over the previous generation DIAL system.

© 2012 OSA

OCIS Codes
(010.3640) Atmospheric and oceanic optics : Lidar
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(140.2020) Lasers and laser optics : Diode lasers
(140.4480) Lasers and laser optics : Optical amplifiers
(140.5960) Lasers and laser optics : Semiconductor lasers
(280.1910) Remote sensing and sensors : DIAL, differential absorption lidar

ToC Category:
Remote Sensing

Original Manuscript: September 5, 2012
Revised Manuscript: October 15, 2012
Manuscript Accepted: October 15, 2012
Published: October 18, 2012

Amin R. Nehrir, Kevin S. Repasky, and John L. Carlsten, "Micropulse water vapor differential absorption lidar: transmitter design and performance," Opt. Express 20, 25137-25151 (2012)

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