Heterogeneous all-solid multicore fiber based multipath Michelson interferometer for high temperature sensing.

A compact high temperature sensor utilizing a multipath Michelson interferometer (MI) structure based on weak coupling multicore fiber (MCF) is proposed and experimentally demonstrated. The device is fabricated by program-controlled tapering the spliced region between single mode fiber (SMF) and a segment of MCF. After that, a spherical reflective structure is formed by arc-fusion splicing the end face of MCF. Theoretical analysis has been implemented for this specific multipath MI structure; beam propagation method based simulation and corresponding experiments were performed to investigate the effect of taper and spherical end face on system's performance. Benefiting from the multipath interferences and heterogeneous structure between the center core and surrounding cores of the all-solid MCF, an enhanced temperature sensitivity of 165 pm/°C up to 900°C and a high-quality interference spectrum with 25 dB fringe visibility were achieved.

[1]  Rodrigo Amezcua-Correa,et al.  Multicore fiber sensor for high-temperature applications up to 1000°C. , 2014, Optics letters.

[2]  Yang Song,et al.  Microwave Interrogated Sapphire Fiber Michelson Interferometer for High Temperature Sensing , 2015, IEEE Photonics Technology Letters.

[3]  Yi Jiang,et al.  High-temperature fiber-optic Fabry-Perot interferometric sensors. , 2015, The Review of scientific instruments.

[4]  Zhao Zhang,et al.  Strain-insensitive and high temperature fiber sensor based on a Mach–Zehnder modal interferometer , 2014 .

[5]  Walter Margulis,et al.  Revisiting twin-core fiber sensors for high-temperature measurements. , 2012, Applied optics.

[6]  Min Liu,et al.  In-Line Fiber Optic Interferometric Sensors in Single-Mode Fibers , 2012, Sensors.

[7]  Deming Liu,et al.  All-solid multi-core fiber-based multipath Mach–Zehnder interferometer for temperature sensing , 2013 .

[8]  Perry Ping Shum,et al.  Miniature temperature sensor with germania-core optical fiber. , 2015, Optics express.

[9]  Xueguang Qiao,et al.  High temperature probe sensor with high sensitivity based on Michelson interferometer , 2015 .

[10]  Xueguang Qiao,et al.  Ultrahigh-Temperature Chirped Fiber Bragg Grating Through Thermal Activation , 2015, IEEE Photonics Technology Letters.

[11]  Ming Tang,et al.  Experimental demonstration of large capacity WSDM optical access network with multicore fibers and advanced modulation formats. , 2015, Optics express.

[12]  Yunjiang Rao,et al.  Fabry–Perot optical fiber tip sensor for high temperature measurement , 2010 .

[13]  J. M. Lopez-Higuera,et al.  High temperature fiber sensor based on a thermo-mechanical written LPG , 2009, International Conference on Optical Fibre Sensors.

[14]  Bowei Zhang,et al.  High-Temperature Resistance Fiber Bragg Grating Temperature Sensor Fabrication , 2007, IEEE Sensors Journal.

[15]  Young-Geun Han,et al.  In-line interferometer based on intermodal coupling of a multicore fiber. , 2015, Optics express.

[16]  Youngjoo Chung,et al.  High temperature fiber sensor with high sensitivity based on core diameter mismatch. , 2008, Optics express.

[17]  Di Wu,et al.  All Single-Mode Fiber Mach–Zehnder Interferometer Based on Two Peanut-Shape Structures , 2012, Journal of Lightwave Technology.

[18]  G Weihs,et al.  All-fiber three-path Mach-Zehnder interferometer. , 1996, Optics letters.