1 May 2009 Comparative analysis of classical and special single-mode microstructured optical fibers as a sensing element for fiber optic microbend sensors
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Abstract
The influence of microbends on a phase shift and attenuation in a classical Corning SMF-28 fiber and in a special microstructured single-mode fiber with a limited number of air-hole rings in the cladding has been investigated. The largest measured phase shift of 750 deg/mm was obtained for the classical fiber at displacement magnitude of 117 μm. This corresponds to 1.3×10-3 change in the effective refractive index of the fundamental LP01 mode in a microbent optical fiber section with length of 24 mm. The phase shift for the investigated microstructured fibers is in 3.9 times less. The cutoff of radiation intensity takes place at displacement magnitudes of 55 and 270 μm for the microstructured fiber and for the SMF-28 fiber, respectively. It is shown that the sensitivity of the microstructured fiber to the displacement magnitude is in about five times higher than that of the Corning SMF-28 fiber.
© (2009) Society of Photo-Optical Instrumentation Engineers (SPIE)
V. I. Borisov, Vladimir Petr Minkovich, I. V. Shilova, "Comparative analysis of classical and special single-mode microstructured optical fibers as a sensing element for fiber optic microbend sensors," Optical Engineering 48(5), 055006 (1 May 2009). https://doi.org/10.1117/1.3137165 . Submission:
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