期刊
LASER & PHOTONICS REVIEWS
卷 7, 期 6, 页码 L71-L76出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.201300072
关键词
distributed feedback laser; organic semiconductor; indirect electrically pumping; triplet exciton; explosive sensing
资金
- EPSRC HYPIX project [EP/ F059922/1, EP/F05999X/1]
- European Commission [284747]
- EPSRC [EP/F05999X/1, EP/F059922/1] Funding Source: UKRI
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 approximate to 30 ns duration LED pump pulses. The laser emits a 533 nm pulsed output beam of approximate to 10 ns duration perpendicular to the polymer film. When exposed to nitroaromatic model explosive vapors at approximate to 8 ppb concentration, the laser shows a 46% change in the surface-emitted output under optimized LED excitation.
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