Application of extended tuning range for external cavity diode lasers to water vapor differential absorption measurements

Obland, M. D.; Nehrir, A. R.; Repasky, Kevin S.; Carlsten, J. L.; Shaw, Joseph A.

doi:10.1117/1.2771654

Cited by 3 publications

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A feedback loop using a wavemeter, described in Refs. 54 and 55, tuned the laser wavelength until the on-line wavelength was reached and held it to within +/-88 MHz (the frequency accuracy of the wavemeter) for the duration of the measurement [54,55]. This wavelength and the reference power were measured.…”

Section: Data Acquisition and Controlmentioning

confidence: 99%

Development of a widely tunable amplified diode laser differential absorption lidar for profiling atmospheric water vapor

Repasky

2010

J. Appl. Remote Sens

View full text Add to dashboard Cite

This work describes the design and testing of a highly-tunable differential absorption lidar (DIAL) instrument utilizing an all-semiconductor transmitter. This new DIAL instrument transmitter has a highly-tunable external cavity diode laser (ECDL) as a seed laser source for two cascaded commercial tapered amplifiers. The transmitter has the capability of tuning over a range of ~ 17 nm centered at about 832 nm to selectively probe several water vapor absorption lines. This capability has been requested in other recent DIAL experiments for wavelengths near 830 nm. The transmitter produces pulse energies of approximately 0.25 μJ at a repetition rate of 20 kHz. The linewidth is exceptionally narrow at <0.3 MHz, with frequency stability that has been shown to be +/-88 MHz and spectral purity of 0.995. Tests of the DIAL instrument to prove the validity of its measurements were undertaken. Preliminary water vapor profiles, taken in Bozeman, Montana, agree to within 5-60% with profiles derived from co-located radiosondes 800 meters above ground altitude. Below 800 meters, the measurements are biased low due to a number of systematic issues that are discussed. The long averaging times required by low-power systems have been shown to lead to biases in data, and indeed, our results showed strong disagreements on nights when the atmosphere was changing rapidly, such as on windy nights or when a storm system was entering the area. Improvements to the system to correct the major systematic biases are described.

show abstract

Section: Data Acquisition and Controlmentioning

confidence: 99%

Development of a widely tunable amplified diode laser differential absorption lidar for profiling atmospheric water vapor

Repasky

2010

J. Appl. Remote Sens

View full text Add to dashboard Cite

show abstract

New wide tunable external cavity interband cascade laser based on a micro-electro-mechanical system device

Hoppe¹,

Rohling²,

Schmidtmann³

et al. 2019

MOEMS and Miniaturized Systems XVIII

View full text Add to dashboard Cite

Water Vapor Profiling Using a Widely Tunable, Amplified Diode-Laser-Based Differential Absorption Lidar (DIAL)

Nehrir

Repasky

Carlsten

et al. 2009

Journal of Atmospheric and Oceanic Technology

Self Cite

View full text Add to dashboard Cite

A differential absorption lidar (DIAL) instrument for automated profiling of water vapor in the lower troposphere has been designed, tested, and is in routine operation at Montana State University. The laser transmitter for the DIAL instrument uses a widely tunable external cavity diode laser (ECDL) to injection seed two cascaded semiconductor optical amplifiers (SOAs) to produce a laser transmitter that accesses the 824-841-nm spectral range. The DIAL receiver utilizes a 28-cm-diameter Schmidt-Cassegrain telescope; an avalanche photodiode (APD) detector; and a narrowband optical filter to collect, discriminate, and measure the scattered light. A technique of correcting for the wavelength-dependent incident angle upon the narrowband optical filter as a function of range has been developed to allow accurate water vapor profiles to be measured down to 225 m above the surface. Data comparisons using the DIAL instrument and collocated radiosonde measurements are presented demonstrating the capabilities of the DIAL instrument.

show abstract

Application of extended tuning range for external cavity diode lasers to water vapor differential absorption measurements

Cited by 3 publications

References 15 publications

Development of a widely tunable amplified diode laser differential absorption lidar for profiling atmospheric water vapor

Development of a widely tunable amplified diode laser differential absorption lidar for profiling atmospheric water vapor

New wide tunable external cavity interband cascade laser based on a micro-electro-mechanical system device

Water Vapor Profiling Using a Widely Tunable, Amplified Diode-Laser-Based Differential Absorption Lidar (DIAL)

Contact Info

Product

Resources

About