Stand-off detection of solid targets with diffuse reflection spectroscopy using a high-power mid-infrared supercontinuum source |
| |
Authors: | Kumar Malay Islam Mohammed N Terry Fred L Freeman Michael J Chan Allan Neelakandan Manickam Manzur Tariq |
| |
Affiliation: | Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109, USA. malayk@umich.edu |
| |
Abstract: | We measure the diffuse reflection spectrum of solid samples such as explosives (TNT, RDX, PETN), fertilizers (ammonium nitrate, urea), and paints (automotive and military grade) at a stand-off distance of 5 m using a mid-infrared supercontinuum light source with 3.9 W average output power. The output spectrum extends from 750-4300 nm, and it is generated by nonlinear spectral broadening in a 9 m long fluoride fiber pumped by high peak power pulses from a dual-stage erbium-ytterbium fiber amplifier operating at 1543 nm. The samples are distinguished using unique spectral signatures that are attributed to the molecular vibrations of the constituents. Signal-to-noise ratio (SNR) calculations demonstrate the feasibility of increasing the stand-off distance from 5 to ~150 m, with a corresponding drop in SNR from 28 to 10 dB. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|