In this Letter, clamp-type quartz tuning fork enhanced photoacoustic spectroscopy (Clamp-type QEPAS) is proposed and realized through the design, realization, and testing of clamp-type quartz tuning forks (QTFs) for photoacoustic gas sensing. The clamp-type QTF provides a wavefront-shaped aperture with a diameter up to 1 mm, while keeping Q factors > 104. This novel, to the best of our knowledge, design results in a more than ten times increase in the area available for laser beam focusing for the QEPAS technique with respect to a standard QTF. The wavefront-shaped clamptype prongs effectively improve the acoustic wave coupling efficiency. The possibility to implement a micro-resonator system for clamp-type QTF is also investigated. A signal-to noise enhancement of ∼30 times has been obtained with a single-tube acoustic micro resonator length of 8 mm, ∼20% shorter than the dual-tube micro-resonator employed in a conventional QEPAS system.
Clamp-type quartz tuning fork enhanced photoacoustic spectroscopy / Wu, Qian; Lv, Haohua; Lin, Leqing; Wu, Hongpeng; Giglio, Marilena; Zhu, Wenguo; Zhong, Yongchun; Sampaolo, Angelo; Patimisco, Pietro; Dong, Lei; Spagnolo, Vincenzo; Yu, Jianhui; Zheng, Huadan. - In: OPTICS LETTERS. - ISSN 0146-9592. - ELETTRONICO. - 47:17(2022), pp. 4556-4559. [10.1364/OL.464334]
Clamp-type quartz tuning fork enhanced photoacoustic spectroscopy
Giglio, Marilena;Sampaolo, Angelo;Patimisco, Pietro;Spagnolo, Vincenzo;
2022-01-01
Abstract
In this Letter, clamp-type quartz tuning fork enhanced photoacoustic spectroscopy (Clamp-type QEPAS) is proposed and realized through the design, realization, and testing of clamp-type quartz tuning forks (QTFs) for photoacoustic gas sensing. The clamp-type QTF provides a wavefront-shaped aperture with a diameter up to 1 mm, while keeping Q factors > 104. This novel, to the best of our knowledge, design results in a more than ten times increase in the area available for laser beam focusing for the QEPAS technique with respect to a standard QTF. The wavefront-shaped clamptype prongs effectively improve the acoustic wave coupling efficiency. The possibility to implement a micro-resonator system for clamp-type QTF is also investigated. A signal-to noise enhancement of ∼30 times has been obtained with a single-tube acoustic micro resonator length of 8 mm, ∼20% shorter than the dual-tube micro-resonator employed in a conventional QEPAS system.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
