Quartz tuning fork-based photodetector for mid-infrared laser spectroscopy
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In this paper, we report a new type of photoelectric detector based on a standard quartz crystal tuning fork (QCTF) with resonant frequency of ~ 32 kHz for spectroscopic applications. Analogous to the photoelectric effect of traditional semiconductor detectors, we utilize the piezoelectric effect of the QCTF to gauge the light intensity. To explore the capabilities of this technique, the impact of incident light beam excitation positions with respect to QCTF on signal amplitude, resonant frequency and Q factor, as well as the dependence on incident light intensity, ambient pressure and temperature, was investigated in detail. Finally, the QCTF-based photodetector was successfully demonstrated for qualitative analysis of gasoline components by combing a broadband tunable external cavity quantum cascade laser.
The authors gratefully acknowledge the financial support from the National Program on Key Research and Development Project (2016YFC0302202), the National Natural Science Foundation of China (61440010, 61675005, 61705002), the Natural Science Foundation of Anhui Province (1508085MF118), the Key Science and Technology Development Program of Anhui Province (1501041136). The Technology Foundation for Selected Overseas Chinese Scholar (J05015143), and Anhui University Personnel Recruiting Project of Academic and Technical Leaders (10117700014).
- 10.Y. Wang, Y. Sun, B. Qin, F. Cui, J. B. Inst. Technol. 23, 241 (2003)Google Scholar