摘要
A photothermal (PT) gas sensor with a hollow-core photonic bandgap fiber (HC-PBF) Fabry-Perot absorption cell is demonstrated. The formation of a high finesse cavity enhances the pump intensity and hence PT phase modulation as well as the sensitivity of PT phase detection by a factor that is proportional to the cavity finesse. Experiments with a 6.2-cm long HC-PBF absorption cell with a finesse of 45 for the pump and 41 for the probe demonstrated detection of 100 part-per-million acetylene in nitrogen with a signal-to-noise ratio of 795 for a detection bandwidth of 0.031 Hz. The double-cavity-enhanced PT gas sensor allows the use of a shorter HC-PBF to develop highly sensitive and fast all-fiber gas sensors.
| 源语言 | 英语 |
|---|---|
| 文章编号 | 8734710 |
| 页（从-至） | 4222-4228 |
| 页数 | 7 |
| 期刊 | Journal of Lightwave Technology |
| 卷 | 37 |
| 期 | 17 |
| DOI | |
| 出版状态 | 已出版 - 1 9月 2019 |
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Tan, Y., Jin, W., Yang, F., Jiang, Y., & Ho, H. L. (2019). Cavity-Enhanced Photothermal Gas Detection with a Hollow Fiber Fabry-Perot Absorption Cell. Journal of Lightwave Technology, 37(17), 4222-4228. 文章 8734710. https://doi.org/10.1109/JLT.2019.2922001