LED pumped polymer laser sensor for explosives.

Autor: Wang Y; Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews North Haugh, St Andrews, KY16 9SS, UK., Morawska PO; Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews North Haugh, St Andrews, KY16 9SS, UK., Kanibolotsky AL; WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde Thomas Graham Building, Glasgow, G1 1XL, UK., Skabara PJ; WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde Thomas Graham Building, Glasgow, G1 1XL, UK., Turnbull GA; Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews North Haugh, St Andrews, KY16 9SS, UK., Samuel ID; Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews North Haugh, St Andrews, KY16 9SS, UK.
Jazyk: angličtina
Zdroj: Laser & photonics reviews [Laser Photon Rev] 2013 Nov; Vol. 7 (6), pp. L71-L76. Date of Electronic Publication: 2013 Oct 08.
DOI: 10.1002/lpor.201300072
Abstrakt: A very compact explosive vapor sensor is demonstrated based on a distributed feedback polymer laser pumped by a commercial InGaN light-emitting diode. The laser shows a two-stage turn on of the laser emission, for pulsed drive currents above 15.7 A. The 'double-threshold' phenomenon is attributed to the slow rise of the ∼30 ns duration LED pump pulses. The laser emits a 533 nm pulsed output beam of ∼10 ns duration perpendicular to the polymer film. When exposed to nitroaromatic model explosive vapors at ∼8 ppb concentration, the laser shows a 46% change in the surface-emitted output under optimized LED excitation.
Databáze: MEDLINE
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