Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

Standoff raman spectroscopy system for remote chemical detection

We have developed a class of aperture coding schemes for Remote Raman Spectrometers (RRS) that remove the traditional trade-off between throughput and spectral resolution. As a result, the size of the remote interrogation region can be driven by operational, rather than optical considerations. In this paper we present the design of our coded-aperture standoff spectroscopy system as well as expe...

Tomographic laser absorption spectroscopy using Tikhonov regularization.

The application of tunable diode laser absorption spectroscopy (TDLAS) to flames with nonhomogeneous temperature and concentration fields is an area where only few studies exist. Experimental work explores the performance of tomographic reconstructions of species concentration and temperature profiles from wavelength-modulated TDLAS measurements within the plume of an axisymmetric McKenna burne...

Intracavity Laser Absorption Spectroscopy

continued on page 4 continued on page 4 Theodor Hänsch makes a time measurement. Introduction Absorption spectroscopy is one of the oldest scientific methods for studying atomic and molecular structure. It is also one of the most powerful research tools for providing information about the world around us. One important application is ultrasensitive trace gas analysis, which is used in many area...

R3-C: Standoff Detection of Explosives: Mid-Infrared Spectroscopy Chemical Sensing

The main objective of the ALERT Phase 2 R3-C component is to develop Vibrational Spectroscopy for photonic standoff detection of highly energetic materials (HEMs): explosives and homemade explosives (HMEs). The expected outcomes of the project are to signifi cantly improve the current state of development of vibrational standoff detection of HEMs/HMEs, in terms of: range (target-observer distan...

Standoff alpha radiation detection via excited state absorption of air