Temperature effects in tuning fork enhanced interferometric photoacoustic spectroscopy

被引：22
作者：
Koehring, M. [1 ]
Boettger, S. [1 ]
Willer, U. [2 ]
Schade, W. [1 ,2 ]
机构：
[1] Fraunhofer Heinrich Hertz Inst, D-38640 Goslar, Germany
[2] Tech Univ Clausthal, Inst Energy Res & Phys Technol, D-38640 Goslar, Germany
来源：
OPTICS EXPRESS | 2013年 / 21卷 / 18期
关键词：
YOUNGS MODULUS; POISSONS RATIO; DEPENDENCE; SILICON; SENSOR; LASERS;
D O I：
10.1364/OE.21.020911
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Temperature dependent measurements with a compact fiber coupled sensor for trace gas detection in the near-infrared based on tuning fork enhanced interferometric photoacoustic spectroscopy are presented. The temperature effects on the sensor have been investigated in a range from T = -41 degrees C to T = 107 degrees C, in particular the influence on the resonance frequency and the Q-factor of the micro tuning fork. The refined sensor head contains a combination of a silicon tuning fork and an acoustic off-beam resonator and permits methane detection with a detection limit of S = (3.85 +/- 0.01) ppm. The functional capability of a numerical model for the optimization of acoustic off-beam resonators in COMSOL Multiphysics (R) is presented. (C) 2013 Optical Society of America
引用
收藏
页码：20911 / 20922
页数：12
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