Numerical removal of water-vapor effects from THz-TDS measurements

Details Numerical removal of water-vapor effects from THz-TDS measurements Numerical removal of water-vapor effects from THz-TDS measurements

2007-10-19

arxiv.org/abs/0710.3621v1

Proceedings of the Royal Society A: Mathematical, Physical & Engineering Sciences, vol. 464, no. 2097, pp 2435-2456, 2008

Computer Science

Computational Engineering, Finance, and Science

Scientific paper

10.1098/rspa.2007.0294

One source of disturbance in a pulsed T-ray signal is attributed to ambient water vapor. Water molecules in the gas phase selectively absorb T-rays at discrete frequencies corresponding to their molecular rotational transitions. This results in prominent resonances spread over the T-ray spectrum, and in the time domain the T-ray signal is observed as fluctuations after the main pulse. These effects are generally undesired, since they may mask critical spectroscopic data. So, ambient water vapor is commonly removed from the T-ray path by using a closed chamber during the measurement. Yet, in some applications a closed chamber is not applicable. This situation, therefore, motivates the need for another method to reduce these unwanted artifacts. This paper presents a study on a computational means to address the problem. Initially, a complex frequency response of water vapor is modeled from a spectroscopic catalog. Using a deconvolution technique, together with fine tuning of the strength of each resonance, parts of the water-vapor response are removed from a measured T-ray signal, with minimal signal distortion.

Affiliated with

Also associated with

No associations

Rating

Numerical removal of water-vapor effects from THz-TDS measurements does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Numerical removal of water-vapor effects from THz-TDS measurements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numerical removal of water-vapor effects from THz-TDS measurements will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-708279