In-fiber optical airflow sensor based on a tapered fiber interferometric cantilever

Li, Chai-Ming; Hsiao, Ying-Li; Lee, Chung-Fen; Lee, Cheng‐Ling

doi:10.1109/oecc.2012.6276768

Cited by 1 publication

(2 citation statements)

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“…The phase difference as the angle increase of the mentioned peaks is shown in Figure 5. Three consecutive rounds were performed to evaluate the phase response; here, the angle was increased from 0° to 6°; the phase difference as the angle increased was computed using the technique described by [22,26]; it is essential to notice that the analyzed peaks show a similar polynomial response. Considering the polynomial response and the positive-negative deviation, the spectral component P1 shows a sensitivity of 0.75 rad/ • in the range of 2 • to 6 • (see Figure 5A).…”

Section: Resultsmentioning

confidence: 99%

“…Some of these applications involve slight angle deflection monitoring [9][10][11]. However, most fiber optic angle sensors are based on interferometric techniques: Mach-Zehnder Interferometer [12,13], Michelson Interferometer [14,15], Fabry-Perot Interferometer [16,17], Fiber Bragg Gratings [18,19], and Tapered Fibers [20][21][22]. In some cases, their fabrication process is intricate, and the interferometer dimension limits practical applications.…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity Modal Analysis of Long Reflective Multimode Interferometer for Small Angle Detection and Temperature

et al. 2023

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This work presents the sensitive modal analysis of a long reflective multimode optical fiber device for angle and temperature. The reflective multimode interference optical fiber device was fabricated by splicing ~40 cm of multimode optical fiber (50/125). This structure provides a random interference reflection spectrum; the wavelength sensitivity analysis indicates that estimating the angle detection is impossible due to the several modes involved. However, by the phase analysis of the Fourier components, it was possible to detect slight angle deflection. Here, three spectral Fourier components were analyzed, and the maximal sensitivity achieved was 1.52 rad/°; the maximal angle variation of the multimode fiber was 3.4°. In addition, the thermal analysis indicates minimal temperature affectation (0.0065 rad/°C). Moreover, it was demonstrated that there is a strong dependence between the sensitivity and the m-order of the modes involved. Considering the fiber optic sensor dimensions and signal analysis, this device is attractive for numerous applications where slight angle detection is needed.

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Section: Resultsmentioning

confidence: 99%