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Proceedings Paper

Diode laser based water vapor DIAL using modulated pulse technique
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Paper Abstract

In this paper, we propose a diode laser based differential absorption lidar (DIAL) for measuring lower-tropospheric water vapor profile using the modulated pulse technique. The transmitter is based on single-mode diode laser and tapered semiconductor optical amplifier with a peak power of 10W around 800nm absorption band, and the receiver telescope diameter is 35cm. The selected wavelengths are compared to referenced wavelengths in terms of random error and systematic errors. The key component of modulated pulse technique, a macropulse, is generated with a repetition rate of 10 kHz, and the modulation within the macropulse is coded according to a pseudorandom sequence with 100ns chip width. As a result, we evaluate both single pulse modulation and pseudorandom coded pulse modulation technique. The water vapor profiles conducted from these modulation techniques are compared to the real observation data in summer in Japan.

Paper Details

Date Published: 17 November 2014
PDF: 9 pages
Proc. SPIE 9262, Lidar Remote Sensing for Environmental Monitoring XIV, 926208 (17 November 2014); doi: 10.1117/12.2069143
Show Author Affiliations
Phong Le Hoai Pham, Tokyo Metropolitan Univ. (Japan)
Makoto Abo, Tokyo Metropolitan Univ. (Japan)


Published in SPIE Proceedings Vol. 9262:
Lidar Remote Sensing for Environmental Monitoring XIV
Upendra N. Singh; Kazuhiro Asai, Editor(s)

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