TY - JOUR AU - Kuczkowski, Michal AU - Ying, Cui AU - Quyen Dinh, Xuan AU - Shum, Perry Ping AU - Rutkowska, Katarzyna A. AU - Woliński, Tomasz R. PY - 2012/12/31 Y2 - 2024/03/29 TI - Microfiber Sagnac Interferometer for sensing applications JF - Photonics Letters of Poland JA - Photonics Lett. Pol. VL - 4 IS - 4 SE - Articles DO - 10.4302/photon. lett. pl.v4i4.358 UR - https://www.photonics.pl/PLP/index.php/letters/article/view/4-48 SP - pp. 134-136 AB - In this paper we propose an optical fiber-based refractive index and temperature sensor using an MNF (micro/nano fiber) inserted in a Sagnac loop interferometer [1]. A portion of the PMF is tapered into a micro/nano dimension to increase the interactions between a guided signal and the surrounding environment. Experimental tests have demonstrated low response to temperature and high sensitivity to refractive index change of a liquid surrounding the MNF. It has been shown that the sensitivity of the setup under test to temperature decreases when a longer MNF is used. The maximum sensitivity for a refractive index achieved equals to 1068nm/RIU, which was obtained by a 4.7-mm long MNF with a diameter of 30um.  <br /> <br /> Full Text: <a class="file" href="/PLP/index.php/letters/article/view/4-48/247" target="_parent">PDF</a> <br /> <br /> <strong>References</strong> <ol> <li> G. Wang, P.P. Shum, L. Tong, C.M. Li; C. Lin, "Polarization Effects in Microfiber Loop and Knot Resonators", IEEE Phot. Tech. Lett. 22, 586 (2010). <a class="file" href="http://dx.doi.org/10.1109/LPT.2010.2042949" target="_parent"> CrossRef </a> </li> <li> L. M. Tong, M. Sumetsky, Subwavelength and Nanometer Diameter Optical Fibers (Zhejiang University Press, Springer 2009). </li> <li> H. Gong, C.C. Chan, L. Chen, X. Dong, "Strain Sensor Realized by Using Low-Birefringence Photonic-Crystal-Fiber-Based Sagnac Loop" IEEE Phot. Tech. Lett. 22(16), 1238 (2010). <a class="file" href="http://dx.doi.org/10.1109/LPT.2010.2053025" target="_parent"> CrossRef </a> </li> <li> X. Dong, H. Tam, P. Shum, "Temperature-insensitive strain sensor with polarization-maintaining photonic crystal fiber based Sagnac interferometer", Appl. Phys. Lett. 90, 151113 (2007). <a class="file" href="http://dx.doi.org/10.1063/1.2722058" target="_parent"> CrossRef </a> </li> <li> C. E. Chryssou, "Theoretical analysis of tapering fused silica optical fibers using a carbon dioxide laser", Opt. Eng. 38(10), 1645 (1999). <a class="file" href="http://dx.doi.org/10.1117/1.602271" target="_parent"> CrossRef </a> </li> <li> K. Milenko et al., "Photonic crystal fiber tip interferometer for refractive index sensing", Opt. Lett. 37(8), 1373 (2012). <a class="file" href="http://dx.doi.org/10.1364/OL.37.001373" target="_parent"> CrossRef </a> </li> <li> Y. Zong et al., "Refractive index sensing based on higher-order mode reflection of a microfiber Bragg grating", Opt. Exp. 18(25), 26345 (2010). <a class="file" href="http://dx.doi.org/10.1364/OE.18.026345" target="_parent"> CrossRef </a> </li> <li> D. Wu et al., "Refractive index sensing based on Mach?Zehnder interferometer formed by three cascaded single-mode fiber tapers", Appl. Opt. 50(11), 1548 (2011). <a class="file" href="http://dx.doi.org/10.1364/AO.50.001548" target="_parent"> CrossRef </a> </li> <li> X. Guo, L. Tong, "Supported microfiber loops for optical sensing", Opt. Exp. 16(19), 14429 (2008). <a class="file" href="http://dx.doi.org/10.1364/OE.16.014429" target="_parent"> CrossRef </a> </li> <li> J. Zhan et al., "Highly Sensitive Temperature Sensor Using PANDA Fiber Sagnac Interferometer", J. Lightwave Technol. 29(24), 3640 (2011). <a class="file" href="http://dx.doi.org/10.1109/JLT.2011.2174195" target="_parent"> CrossRef </a> </li> <li> O. Fraz?o, J.M.T. Baptista, J.L. Santos, "Recent Advances in High-Birefringence Fiber Loop Mirror Sensors", Sensors 7, 2970 (2007). <a class="file" href="http://dx.doi.org/10.3390/s7112970" target="_parent"> CrossRef</a></li></ol> ER -