Micropulse water vapor differential absorption lidar: transmitter design and performance

被引：40
作者：
Nehrir, Amin R. [1 ]
Repasky, Kevin S. [1 ]
Carlsten, John L. [2 ]
机构：
[1] Montana State Univ, Elect & Comp Engn Dept, Bozeman, MT 59715 USA
[2] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA
来源：
OPTICS EXPRESS | 2012年 / 20卷 / 22期
关键词：
LASER;
D O I：
10.1364/OE.20.025137
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 mu s pulse duration (7 mu J) 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. (C) 2012 Optical Society of America
引用
收藏
页码：25137 / 25151
页数：15
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