Off-beam quartz-enhanced photoacoustic spectroscopy with LEDs

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• 作者：S. Bttger (1)
  M. Khring (1)
  U. Willer (2) (3)
  W. Schade (1) (2) (3)
  
• 刊名：Applied Physics B: Lasers and Optics
• 出版年：2013
• 出版时间：November 2013
• 年：2013
• 卷：113
• 期：2
• 页码：227-232
• 全文大小：
• 作者单位：S. Bttger (1)
  M. Khring (1)
  U. Willer (2) (3)
  W. Schade (1) (2) (3)
  
  1. Fraunhofer Heinrich Hertz Institute, Am Stollen 19B, 38640, Goslar, Germany
  2. Institute for Energy Research and Physical Technology, Clausthal University of Technology, Am Stollen 19B, 38640, Goslar, Germany
  3. Energy Research Centre of Niedersachsen (EFZN), Am Stollen 19A, 38640, Goslar, Germany
  
• ISSN：1432-0649

文摘

A photoacoustic ozone sensor based on quartz-enhanced photoacoustic spectroscopy is presented. Instead of a laser, a UV-LED at 285nm is utilized as light source. Using an acoustical resonator in off-beam configuration, it is feasible to align the light of the LED through the resonator tube. The sensor is integrated in a miniaturized flow-through gas cell which allows fast gas exchange. The sensor performance and the influence of the speed of sound on the measurement signal are investigated. For the detection of ozone in the Hartley band, a detection limit of S=1.270.08ppmv (1 and a noise equivalent absorption sensitivity of D=(3.0210811010)cm1W(Hz)1/2 have been achieved.