Sub parts-per-billion detection of ethane in a 30-meters long mid-IR Antiresonant Hollow-Core Fiber
Sub parts-per-billion detection of ethane in a 30-meters long mid-IR Antiresonant Hollow-Core Fiber
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DOI：
10.1016/j.optlastec.2021.107638
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发表时间：
2021-11-10
影响因子：
5
通讯作者：
Abramski, Krzysztof
中科院分区：
文献类型：
--
作者：
Jaworski, Piotr;Krzempek, Karol;Abramski, Krzysztof
在这项工作中，我们提出了第一个演示的气体传感器，利用波长调制光谱技术和中红外引导反共振空芯光纤的记录长度为30米。自制造的ARHCF被用作气密的、低体积的吸收池，在传感器的设置内提供扩展的激光-气体分子相互作用路径，这使其能够有效地检测2996.88 cm-1处的乙烷。得益于ARHCF独特的制导性能，该传感器在14秒的积分时间内达到了670 parts-per-trillion的最低检测限，这与使用更复杂检测技术或具有数十米长光程的多程池的基于体光学的系统相当。所获得的结果证实，基于ARHCF的气体传感器可以成功地与基于体光学的中红外气体传感器配置竞争，甚至优于后者。所获得的结果显示了开发新型、小体积、紧凑且可靠的气体检测器的潜力，该气体检测器允许在其痕量浓度水平下对各种气体物质进行精确分析。
In this work, we present the first demonstration of a gas sensor utilizing the Wavelength Modulation Spectroscopy technique and a mid-IR guiding Antiresonant Hollow-Core Fiber with a record length of 30 m. The selffabricated ARHCF was used as an air-tight, low-volume absorption cell delivering an extended laser-gas molecules interaction path within the sensor's setup, which enabled it to efficiently detect ethane at 2996.88 cm-1. Benefiting from the unique guidance properties of the ARHCF, the sensor reached a minimum detection limit of 670 parts-per-trillion by volume for 14 s integration time, which is at a level comparable to the bulk optics-based systems utilizing more complex detection techniques or multipass cells with tens of meters long optical path lengths. The obtained results confirm that ARHCF-based gas sensors can successfully compete with or even outperform bulk optics-based mid-IR gas sensor configurations. The obtained results show the potential for the development of novel, low-volume, compact, and reliable types of gas detectors allowing precise analysis of various gaseous substances at their trace concentration level.