Progress toward a water-vapor differential absorption lidar (DIAL) using a widely tunable amplified diode laser source

Michael D. Obland; Lei S. Meng; Kevin S. Repasky; Joseph A. Shaw; John L. Carlsten

doi:10.1117/12.617823

30 August 2005 Progress toward a water-vapor differential absorption lidar (DIAL) using a widely tunable amplified diode laser source

Michael D. Obland, Lei S. Meng, Kevin S. Repasky, Joseph A. Shaw, John L. Carlsten

Author Affiliations +

Proceedings Volume 5887, Lidar Remote Sensing for Environmental Monitoring VI; 58870W (2005) https://doi.org/10.1117/12.617823
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Water vapor is one of the most significant constituents of the atmosphere because of its role in cloud formation, precipitation, and interactions with electromagnetic radiation, especially its absorption of longwave infrared radiation. Some details of the role of water vapor and related feedback mechanisms in the Earth system need to be characterized better if local weather, global climate, and the water cycle are to be understood. A Differential Absorption LIDAR (DIAL) with a compact laser diode source may be able to provide boundary-layer water vapor profiles with improved vertical resolution relative to passive remote sensors. While the tradeoff with small DIAL systems is lower vertical resolution relative to large LIDARs, the advantage is that DIAL systems can be built much smaller and more robust at less cost, and consequently are the more ideal choice for creating a multi-point array or satellite-borne system. This paper highlights the progress made at Montana State University towards a water vapor DIAL using a widely tunable amplified external cavity diode laser (ECDL) transmitter. The ECDL is configured in a Littman-Metcalf configuration and was built at Montana State University. It has a continuous wave (cw) output power of 20 mW, a center wavelength of 832 nm, a coarse tuning range of 17 nm, and a continuous tuning range greater than 20 GHz. The ECDL is used to injection seed a tapered amplifier with a cw output power of 500 mW. The spectral characteristics of the ECDL are transferred to the output of the tapered amplifier. The rest of the LIDAR uses commercially available telescopes, filter optics, and detectors. Initial cw and pulsed absorption measurements are presented.

Citation Download Citation

Michael D. Obland, Lei S. Meng, Kevin S. Repasky, Joseph A. Shaw, and John L. Carlsten "Progress toward a water-vapor differential absorption lidar (DIAL) using a widely tunable amplified diode laser source", Proc. SPIE 5887, Lidar Remote Sensing for Environmental Monitoring VI, 58870W (30 August 2005); https://doi.org/10.1117/12.617823

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available