Abstract
We demonstrate a single-beam, standoff (>10 m) detection and identification of various materials including minute amounts of explosives under ambient light conditions. This is obtained by multiplex coherent anti-Stokes Raman scattering spectroscopy (CARS) using a single femtosecond phase-shaped laser pulse. We exploit the strong nonresonant background for amplification of the backscattered resonant CARS signals by employing a homodyne detection scheme. The simple and highly sensitive spectroscopic technique has a potential for hazardous materials standoff detection applications.
Original language | English |
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Article number | 171116 |
Journal | Applied Physics Letters |
Volume | 92 |
Issue number | 17 |
DOIs | |
State | Published - 2008 |
Externally published | Yes |