In-line fiber Mach–Zehnder interferometer for simultaneous measurement of refractive index and temperature based on thinned fiber

Li, Lecheng; Xia, Li; Xie, Zhenhai; Hao, Liangning; Shuai, Binbin; Liu, Deming

doi:10.1016/j.sna.2012.04.014

Cited by 57 publications

(18 citation statements)

References 18 publications

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“…Single-mode-multimode-thin core-single-mode fiber structure transmission spectrum. Reproduced with permission from Li et al [69,70] # Elsevier. Reproduced by permission of Elsevier.…”

Section: Thin-core Fibermentioning

confidence: 99%

“…Li et al [69,70] reported a single-mode fiber-multimode fiber-thin-core fiber-single mode fiber (SMTS) structure, as shown in Figure 6a. The interference occurred between cladding modes and the core mode of thin-core fiber by employing a multimode fiber as a coupler to introduce more light into the cladding and ensure the transmission spectral interference fringes were clear and deep, as shown in Figures 6 b and 6c.…”

Section: Optical Fiber Sensors Based On Modal Interferences 15mentioning

confidence: 99%

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Applications of Modal Interferences in Optical Fiber Sensors Based on Mismatch Methods

Cai

Zhao

2014

Instrumentation Science & Technology

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& Modal interference is a major topic in optical fiber sensing technology that has been applied to measure temperature, refractive index, curvature, displacement, strain, humidity, pH, and other parameters. In this article, basic sensing principles for the development of modal interferometers are introduced based on core-cladding and core modes. The structures, principles, and applications of the sensors are comprehensively reviewed and potential and future prospects are discussed.

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“…Single-mode-multimode-thin core-single-mode fiber structure transmission spectrum. Reproduced with permission from Li et al [69,70] # Elsevier. Reproduced by permission of Elsevier.…”

Section: Thin-core Fibermentioning

confidence: 99%

Section: Optical Fiber Sensors Based On Modal Interferences 15mentioning

confidence: 99%

Applications of Modal Interferences in Optical Fiber Sensors Based on Mismatch Methods

Cai

Zhao

2014

Instrumentation Science & Technology

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“…Interferometric fiber optic sensors have been widely studied due to their excellent RI sensitivity and moderate temperature sensitivity [1,2]. Diverse MachZehnder interferometers are constructed using structures such as core offset [3,4], tapered fiber [5], and multimode microfiber [6] for simultaneous measurement of temperature and RI. Various configurations of MZI combined with fiber Bragg grating have also been explored to measure ambient This refractive index and temperature simultaneously, including peanut-shape and core-offset structure [7], and only coreoffset MZI [8].…”

Section: Introductionmentioning

confidence: 99%

Bragg Grating Embedded in Mach-Zehnder Interferometer for Refractive Index and Temperature Sensing

Ahmed

Ahsani

Saad

et al. 2016

IEEE Photon. Technol. Lett.

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Abstract-Fiber Bragg grating (FBG) embedded in a microfiber Mach-Zehnder interferometer (MZI) is presented for sensing multi-parameters such as temperature and refractive index. The MZI is constructed by splicing a short length of 40 µm diameter microfiber between standard single mode fibers. A millimeter long FBG is then written in the microfiber using direct point-by-point ultrafast laser inscription method. The microfiber MZI shows moderate sensitivity to ambient refractive index and temperature changes. In contrast, the microfiber FBG is insensitive to ambient refractive index change while it exhibits typical sensitivity to temperature variation. These distinct characteristics of the FBG and MZI sensors enable simultaneous measurement of refractive index and temperature, and temperature compensation in ambient refractive index measurement.Index Terms-Miniature microfiber Mach-Zehnder interferometer, microfiber Bragg grating, ultrafast laser inscription, simultaneous temperature and refractive index measurement, temperature compensated refractive index measurement.

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“…The measurement techniques for the concentration of chemical solution have attracted much interest in many qualitycontrol industrial processes [1][2][3][4][5][6][7]. It is important to realize the high quality of chemical concentration sensors to monitor concentration stability and abnormal aging effects.…”

Section: Introductionmentioning

confidence: 99%

“…However, these methods have some limitation in terms of conductivity, causticity, and explosivity in environments where flammable chemical liquids are exploited. Recently, optical fiber sensors can be considered as the promising sensing probe in the flammable chemical sensing area because of their many advantages such as high sensitivity, electromagnetic immunity, low optical power consumption, and cost effectiveness [4][5][6][7]. The accurate measurement of the chemical concentration, however, may be limited by temperature.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Sagnac interferometer with high measurement resolution for simultaneous measurement of ambient index and temperature

Kwon

Han

2014

SPIE Proceedings

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A simple technique for simultaneous measurement of the concentration of ethylene glycol and temperature by using a hybrid Sagnac interferometer is proposed and experimentally demonstrated. The hybrid Sagnac interferometer is configured by inserting a long-period fiber grating (LPFG) and a D-shaped polarization-maintaining fiber (PMF) into a Sagnac interferometer. By partially removing the cladding of the PMF, we make the Sagnac interferometer sensitive to ambient index by exposing the core region of the D-shaped PMF to external circumstance. The determinant of the sensitivity matrix of the proposed sensing probe is improved by using the negative temperature sensitivity of the LPFG.

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In-line fiber Mach–Zehnder interferometer for simultaneous measurement of refractive index and temperature based on thinned fiber

Cited by 57 publications

References 18 publications

Applications of Modal Interferences in Optical Fiber Sensors Based on Mismatch Methods

Applications of Modal Interferences in Optical Fiber Sensors Based on Mismatch Methods

Bragg Grating Embedded in Mach-Zehnder Interferometer for Refractive Index and Temperature Sensing

Hybrid Sagnac interferometer with high measurement resolution for simultaneous measurement of ambient index and temperature

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