High temperature high sensitivity Mach-Zehnder interferometer based on waist-enlarged fiber bitapers

Zhao, Na; Lin, Qijing; Jing, Weixuan; Wu, Zirong; Yao, Kun; Tian, Bian; Zhang, Zhongkai; Shi, Peng

doi:10.1016/j.sna.2017.09.016

Cited by 31 publications

(16 citation statements)

References 5 publications

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“…A schematic diagram of the micro taper in-line fiber MZI is shown in Figure 1. temperature, strain, bending, liquid level, and refractive index (RI), due to its flexibility in structure design [16][17][18][19][20][21][22][23]. A single mode-multimode-single mode (SMS) fiber structure is a typical fiber inline MZI configuration, where the multimode fiber (MMF) section could be a multimode fiber [24], photonic crystal fiber [25], thin-core fiber [26][27][28], no-core fiber, and twin/multiple core fiber [29][30][31][32][33].…”

Section: Theoretical Analysismentioning

confidence: 99%

“…There are various types of optical fiber interferometers, including the fiber Fabry-Pérot interferometer, the Mach-Zehnder interferometer (MZI), and the Michelson and Sagnac interferometer [6][7][8][9][10][11][12][13][14][15]. Among these sensor structures, the optical fiber MZI sensor has attracted considerable research interest and been applied for various parameter measurements, such as temperature, strain, bending, liquid level, and refractive index (RI), due to its flexibility in structure design [16][17][18][19][20][21][22][23]. A single mode-multimode-single mode (SMS) fiber structure is a typical fiber inline MZI configuration, where the multimode fiber (MMF) section could be a multimode fiber [24], photonic crystal fiber [25], thin-core fiber [26][27][28], no-core fiber, and twin/multiple core fiber [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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High Temperature (Up to 950 °C) Sensor Based on Micro Taper In-Line Fiber Mach–Zehnder Interferometer

Liao

Liu

et al. 2019

Applied Sciences

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A high temperature (up to 950 °C) sensor was proposed and demonstrated based on a micro taper in-line fiber Mach–Zehnder interferometer (MZI) structure. The fiber MZI structure comprises a single mode fiber (SMF) with two micro tapers along its longitudinal direction. An annealing at 1000 °C was applied to the fiber sensor to stabilize the temperature measurement. The experimental results showed that the sensitivity was 0.114 nm/°C and 0.116 nm/°C for the heating and cooling cycles, respectively, and, after two days, the sensor still had a sensitivity of 0.11 nm/°C, showing a good stability of the sensor. A probe-type fiber MZI was designed by cutting the sandwiched SMF, which has good linear temperature responses of 0.113 nm/°C over a large temperature range from 89 to 950 °C. The probe-type fiber MZI temperature sensor was independent to the surrounding refractive index (RI) and immune to strain. The developed sensor has a wide application prospect in the fields of high temperature hot gas flow, as well as oil and gas field development.

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Section: Theoretical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High Temperature (Up to 950 °C) Sensor Based on Micro Taper In-Line Fiber Mach–Zehnder Interferometer

Liao

Liu

et al. 2019

Applied Sciences

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“…This sensor was used to measure temperatures up to 800 °C and it revealed a temperature sensitivity of S ~ 13.4 pm/°C. A compact and high temperature sensor-based MF-MZI was presented in 2017, based on waist-enlarged fiber bitapers [ 86 ]. The MZI was composed of a thin core fiber (TCF) sandwiched between two SMFs with two waist-enlarged bi-tapers and allowed to measure temperatures of 1000 °C with S ~ 0.087 nm/°C.…”

Section: Nonresonant Micro/nanofiber Temperature Sensorsmentioning

confidence: 99%

A Review of Microfiber-Based Temperature Sensors

Talataisong

Ismaeel

Brambilla

2018

Sensors

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Optical microfiber-based temperature sensors have been proposed for many applications in a variety of industrial uses, including biomedical, geological, automotive, and defense applications. This increasing demand for these micrometric devices is attributed to their large dynamic range, high sensitivity, fast-response, compactness and robustness. Additionally, they can perform in-situ measurements remotely and in harsh environments. This paper presents an overview of optical microfibers, with a focus on their applications in temperature sensing. This review broadly divides microfiber-based temperature sensors into two categories: resonant and non-resonant microfiber sensors. While the former includes microfiber loop, knot and coil resonators, the latter comprises sensors based on functionally coated/doped microfibers, microfiber couplers, optical gratings and interferometers. In the conclusions, a summary of reported performances is presented.

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“…Most of in-fiber MZI sensors utilize some mode-field-mismatched structures, such as micro-air-holes [ 15 ], and waist-enlarged fiber bitapers [ 16 ], to excite different cladding modes which are intended to interfere with the core mode. However, both cladding modes and core mode participate in the interference propagate in silica, thus they have similar mode effective refractive indicies (RI), which results in a sensing area of up to a few centimeters long, in order to accumulate enough phase difference [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, for a temperature sensor, large thermal coefficient of the sensing area material is of great benefit to the sensitivity improvement. In contrast, the thermal expansion and thermo-optic coefficients (TOCs) of silica-based optical fibers are small, which limits the sensitivities of the reported MZI-based fiber temperature sensors to hundreds even tens of picometers per centigrade [ 15 , 16 ]. Recently, some research has sought to improve the temperature sensitivity with the assistance of high TOC liquids.…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive Mach-Zehnder Interferometric Temperature Sensor Based on Liquid-Filled D-Shaped Fiber Cavity

Zhang

Gao

Luo

et al. 2018

Sensors

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A liquid-filled D-shaped fiber (DF) cavity serving as an in-fiber Mach–Zehnder interferometer (MZI) has been proposed and experimentally demonstrated for temperature sensing with ultrahigh sensitivity. The miniature MZI is constructed by splicing a segment of DF between two single-mode fibers (SMFs) to form a microcavity (MC) for filling and replacement of various refractive index (RI) liquids. By adjusting the effective RI difference between the DF and MC (the two interference arms), experimental and calculated results indicate that the interference spectra show different degrees of temperature dependence. As the effective RI of the liquid-filled MC approaches that of the DF, temperature sensitivity up to −84.72 nm/°C with a linear correlation coefficient of 0.9953 has been experimentally achieved for a device with the MC length of 456 μm, filled with liquid RI of 1.482. Apart from ultrahigh sensitivity, the proposed MCMZI device possesses additional advantages of its miniature size and simple configuration; these features make it promising and competitive in various temperature sensing applications, such as consumer electronics, biological treatments, and medical diagnosis.

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High temperature high sensitivity Mach-Zehnder interferometer based on waist-enlarged fiber bitapers

Cited by 31 publications

References 5 publications

High Temperature (Up to 950 °C) Sensor Based on Micro Taper In-Line Fiber Mach–Zehnder Interferometer

High Temperature (Up to 950 °C) Sensor Based on Micro Taper In-Line Fiber Mach–Zehnder Interferometer

A Review of Microfiber-Based Temperature Sensors

Ultrasensitive Mach-Zehnder Interferometric Temperature Sensor Based on Liquid-Filled D-Shaped Fiber Cavity

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