LED pumped polymer laser sensor for explosives

Y. Wang, P.O. Morawska, A.L. Kanibolotsky, P.J. Skabara, G.A. Turnbull, I.D.W. Samuel

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)
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Abstract

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. 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.
Original languageEnglish
Pages (from-to)L71-L76
JournalLaser & Photonics Reviews
Volume7
Issue number6
Early online date8 Oct 2013
DOIs
Publication statusPublished - Nov 2013

Keywords

  • Distributed feedback laser
  • Organic semiconductor
  • Indirect electrically pumping
  • Triplet exciton
  • Explosive sensing

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