科研之友
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摘要
In this letter, we propose and theoretically analyze a volatile organic compound (VOC) sensor based on the bandgap shift of a hollow-core photonic bandgap fiber (HC-PBGF). Since the bandgap of the HC-PBGF is sensitive to the periodic structure as well as the refractive index of the material which forms the periodic structure, we can detect the concentration of the VOC by monitoring the bandgap shift. Applying the full-vector finite-element method (FEM) and the perfectly matched layer (PML), we simulate a series of the bandgap under different concentrations of methanol and study the relationship between the bandgap and the methanol's concentrations in detail. The simulation results show that the proposed VOC sensor is feasible and the sensitivity of the sensor is as high as 25 ppm when the volume concentration of the methanol is in the range of 0 ppnn to 50000 ppm.
- 出版日期2012-7
- 单位中国计量大学
