Photonic Bandgap Fibre Based Gas Sensing: Current Status and Future Possibilities

Pawłat, Joanna; Li, X.; Sugiyama, Tadashi; Liang, Jinxing; Zimin, Y.; Zimin, Lev; Ikezawa, Satoshi; Ueda, T.

doi:10.1007/978-3-319-42625-9_8

Cited by 2 publications

(3 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Figure 4, we also present the theoretical fringe shifts calculated using Equation (1,2), in which the temperature T = 25 • C (laboratory temperature) and l = 2.5 cm. The theoretical predictions agree quite well with the experimental results.…”

Section: Experimental and Numerical Resultsmentioning

confidence: 99%

“…As mentioned earlier, analysis on intensity variations may provide a much higher sensitivity. For instance, in Figure 5b we could approximately apply a linear fitting between maximum (I a ) and minimum (I b ) on the second falling edge that corresponds to air pressure variation of 45.0 hPa, and thus a refractive index variation of 1.20 × 10 −5 RIU according to Equation (2). Here, the intensity difference between I a and I b is~1.22 µW.…”

Section: Experimental and Numerical Resultsmentioning

confidence: 99%

“…In recent years, the R&D of fiber-optic gas sensors has been boosted by the growing demand of a variety of scientific and industrial applications in a wide spectrum of fields [1,2]. For example, detection of explosive/flammable gases and poisonous gases is of great importance in mining and petroleum industry [3,4]; selective sensing of volatile organic biomarkers exhaled from breath could provide useful information for clinical diagnosis of lung or gastric cancers [5]; moreover, monitoring of the gaseous concentration and pressure is also essential for optimizing working condition of high-power gaseous laser systems.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dual-Core Fiber-Based Interferometer for Detection of Gas Refractive Index

Chen

et al. 2020

Photonics

View full text Add to dashboard Cite

We demonstrate a dual-core fiber-based Mach–Zehnder interferometer that could be used for precise detection of variations in refractive indices of gaseous samples. The fiber used here have a solid germanium-doped silica core and an air core that allows gases to flow through. Coherent laser beams are coupled to the two cores, respectively, and thus excite guiding modes thereby. Interferogram would be produced as the light transmitted from the dual cores interferes. Variations in refractive index of the hollow core lead to variations in phase difference between the modes in the two cores, thus shifting the interference fringes. The fringe shifts can be then interrogated by a photodiode together with a narrow slit in front. The resolution of the sensor was found to be ~1 × 10−8 RIU, that is comparable to the highest resolution obtained by other fiber sensors reported in previous literatures. Other advantages of our sensor include very low cost, high sensitivity, straightforward sensing mechanism, and ease of fabrication.

show abstract

Section: Experimental and Numerical Resultsmentioning

confidence: 99%

Section: Experimental and Numerical Resultsmentioning

confidence: 99%