Simultaneous measurement of refractive index and temperature using multimode interference inside a high birefringence fiber loop mirror

Abstract A fiber optic sensor for simultaneous measurement of refractive index and temperature is presented. The sensing probe is realized by introducing a multimode interference device inside a high birefringence fiber loop mirror resulting in a configuration capable of refractive index and temperature discrimination. The multimode interference peak is sensitive to the surrounding refractive index (90 nm/RIU) and slightly responsive to the temperature (0.01 nm/°C). On the other hand, the birefringent fiber loop mirror is highly sensitive to temperature (2.36 nm/°C) and it has almost no response to refractive index. Using a power ratiometric peak detection scheme, a temperature independent refractive index measurement can be achieved with a resolution of ±2.25 × 10−5 RIU.

[1]  Chang-Bong Kim,et al.  Measurement of the refractive index of liquids at 1.3 and 1.5 micron using a fibre optic Fresnel ratio meter , 2004 .

[2]  Juan Kang,et al.  [Measurement of refractive index with a PM-LPG based Sagnac loop sensor]. , 2011, Guang pu xue yu guang pu fen xi = Guang pu.

[3]  Orlando Frazão,et al.  High birefringence D-type fibre loop mirror used as refractometer , 2008 .

[4]  Hideki Fukano,et al.  High-sensitivity optical fiber refractive index sensor using multimode interference structure , 2012, IEICE Electron. Express.

[5]  H. Ahlfeldt,et al.  Fiber optical Bragg grating refractometer , 1998 .

[6]  D. Viegas,et al.  Refractive index sensing of aqueous media based on plasmonic resonance in tapered optical fibres operating in the 1.5 μm region , 2010 .

[7]  Orlando Frazão,et al.  Simultaneous Measurement of Refractive Index and Temperature Using a Hybrid Fiber Bragg Grating/Long-Period Fiber Grating Configuration , 2009 .

[8]  I. C. Goyal,et al.  Novel refractometer using a tapered optical fibre , 1984 .

[9]  G. Laffont,et al.  Tilted short-period fibre-Bragg-grating-induced coupling to cladding modes for accurate refractometry , 2001 .

[10]  Orlando Frazão,et al.  Fiber Bragg grating sensing system for simultaneous measurement of salinity and temperature , 2004 .

[11]  Yuze Sun,et al.  Sensitive optical biosensors for unlabeled targets: a review. , 2008, Analytica chimica acta.

[12]  Hamid Latifi,et al.  Non-adiabatic tapered optical fiber sensor for measuring the interaction between α-amino acids in aqueous carbohydrate solution , 2010 .

[13]  Jens Kobelke,et al.  Optical refractometer based on large-core air-clad photonic crystal fibers. , 2011, Optics letters.

[14]  Yongfeng Lu,et al.  Optical fiber refractometer based on cladding-mode Bragg grating. , 2010, Optics letters.

[15]  Xinyong Dong,et al.  A polarization-maintaining fiber loop mirror based sensor for liquid refractive index absolute measurement , 2012 .

[16]  O. Frazao,et al.  Controlling the Sensitivity of Refractive Index Measurement Using a Tapered Fiber Loop Mirror , 2011, IEEE Photonics Technology Letters.

[17]  Orlando Frazão,et al.  Ultrahigh-sensitivity temperature fiber sensor based on multimode interference. , 2012, Applied optics.

[18]  M. Hernáez,et al.  Dual-Peak Resonance-Based Optical Fiber Refractometers , 2010, IEEE Photonics Technology Letters.

[19]  I. Bennion,et al.  A high sensitivity long period grating Mach-Zehnder refractometer , 2002, 2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533).

[20]  Hamid Latifi,et al.  Measuring bacterial growth by refractive index tapered fiber optic biosensor. , 2010, Journal of photochemistry and photobiology. B, Biology.

[21]  Alan D. Kersey,et al.  Analysis of the response of long period fiber gratings to external index of refraction , 1998 .

[22]  Janez Možina,et al.  Optical fiber reflection refractometer , 1995 .

[23]  Yongmin Jung,et al.  Compact three segmented multimode fibre modal interferometer for high sensitivity refractive-index measurement , 2006 .

[24]  J.L. Santos,et al.  Simultaneous Measurement for Strain and Temperature Based on a Long-Period Grating Combined With a High-Birefringence Fiber Loop Mirror , 2006, IEEE Photonics Technology Letters.

[25]  Susana O. Silva,et al.  Multimode interference tapered fiber refractive index sensors. , 2012, Applied optics.