Hollow-Core Fiber-Based High Finesse Resonating Cavity for High Sensitivity Gas Detection
| Autor: | Hoi Lut Ho, Congzhe Zhang, Wei Jin, Fan Yang, Yanzhen Tan, Yuechuan Lin, Yun Qi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry Single-mode optical fiber 02 engineering and technology 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Finesse 020210 optoelectronics & photonics Optics law Fiber optic sensor Optical cavity 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Fiber business Optical path length Fabry–Pérot interferometer Photonic-crystal fiber |
| Zdroj: | Journal of Lightwave Technology. 35:2887-2893 |
| ISSN: | 1558-2213 0733-8724 |
| DOI: | 10.1109/jlt.2017.2705229 |
| Popis: | High finesse hollow-core photonic bandgap fiber (HC-PBF) resonating Fabry–Perot gas cells are presented. These gas cells are made with a piece of HC-PBF sandwiched by two single mode fibers with mirrored ends. A HC-PBF cavity made with 6.75-cm-long HC-1550-06 fiber achieved a cavity finesse of 128, corresponding to an effective optical path length of ∼5.5 m. Experiment with a 9.4-cm-long Fabry–Perot gas cell with a finesse of 68 demonstrated a detection limit of 7 ppm acetylene. Compared with a single-path nonresonating HC-PBF, the use of a high finesse resonating HC-PBF cavity can reduce significantly the effect of modal interference on gas detection and improve the detection sensitivity. The cavity-enhanced HC-PBF gas cells enable stronger light–gas interaction and can be used to develop all-fiber gas sensors with high sensitivity and fast response. |
| Databáze: | OpenAIRE |
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