Simultaneous measurement of temperature and refractive index based on a Mach–Zehnder interferometer cascaded with a fiber Bragg grating

Cao, Ye; Liu, Huiying; Tong, Zhengrong; Yuan, Shuo; Su, Jun

doi:10.1016/j.optcom.2014.12.067

Cited by 66 publications

(17 citation statements)

References 14 publications

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“…The core sensitive element FBG has wavelength selection characteristics, and only those wavelengths that satisfy the Bragg condition are affected and strongly back-reflected. The reflected central wavelength λ B of the FBG can be expressed as [11][12][13] …”

Section: Theoretical Calculation Modelmentioning

confidence: 99%

One novel type of miniaturization FBG rotation angle sensor with high measurement precision and temperature self-compensation

2017

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Abstract:In order to achieve rotation angle measurement, one novel type of miniaturization fiber Bragg grating (FBG) rotation angle sensor with high measurement precision and temperature self-compensation is proposed and studied in this paper. The FBG rotation angle sensor mainly contains two core sensitivity elements (FBG1 and FBG2), triangular cantilever beam, and rotation angle transfer element. In theory, the proposed sensor can achieve temperature self-compensation by complementation of the two core sensitivity elements (FBG1 and FBG2), and it has a boundless angel measurement range with 2π rad period duo to the function of the rotation angle transfer element. Based on introducing the joint working processes, the theory calculation model of the FBG rotation angel sensor is established, and the calibration experiment on one prototype is also carried out to obtain its measurement performance. After experimental data analyses, the measurement precision of the FBG rotation angle sensor prototype is 0.2 ˚ with excellent linearity, and the temperature sensitivities of FBG1 and FBG2 are 10 pm/℃ and 10.1 pm/℃, correspondingly. All these experimental results confirm that the FBG rotation angle sensor can achieve large-range angle measurement with high precision and temperature self-compensation.

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Section: Theoretical Calculation Modelmentioning

confidence: 99%

One novel type of miniaturization FBG rotation angle sensor with high measurement precision and temperature self-compensation

2017

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“…Fiber optic RI sensors are widely used for their unique advantages such as compact structure, high-resolution detection, excellent aging characteristics, ability to work in chemically hazardous environments, and inherent resistance to external electromagnetic interference [4,5]. At present, a variety of fiber optic sensors, such as Mach-Zehnder interferometer (MZI) [6][7][8][9][10][11][12][13][14][15][16][17], Fabry-Perot interferometer [18,19], optical fiber grating sensors [20,21], and surface plasmon resonance [22,23] are used. Among them, MZI-based sensors have been widely studied due to their low manufacturing cost and simple structure.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, MZI-based sensors have been widely studied due to their low manufacturing cost and simple structure. The structure for MZI sensors can be achieved by utilizing various fiber types, such as microfiber [8], multimode [9,10], photonic crystal fiber (PCF) [11,12], or fabrication techniques, such as core mismatch [13,14], tapering [15,16], and different type fiber splicing [17]. The higher order modes in the cladding are excited by the mismatch of the mode fields.…”

Section: Introductionmentioning

confidence: 99%

High-Sensitivity and Temperature-Insensitive Refractometer Based on TNHF Structure for Low-Range Refractive Index Measurement

Wang¹,

Pang²,

Ma³

et al. 2019

PIER

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Refractive index (RI) measurements find extensive use in biochemical sensing field. However, currently available RI sensors exhibit excessive temperature crosstalk and have low sensitivity in the low RI range. To solve this, a high-sensitivity and temperature-insensitive refractometer based on a tapered no-core-hollow-core fiber (TNHF) structure is proposed for low-range RI measurement. The TNHF comprises two Mach-Zehnder interferometers that are introduced within the tapered nocore fiber and hollow-core fiber, thereby establishing a composite interference. The results of an experimental evaluation demonstrate that maximum sensitivities of 482.74 nm/RIU within an RI range of 1.335 ∼ 1.3462 can be achieved, which is greater than that achieved using a traditional modal interferometer structure. Significantly, the refractometer exhibits ultra-low temperature sensitivities of 0.062 dB/ • C and 6.5 pm/ • C, which can alleviate the temperature crosstalk. The refractometer can be realistically applied in many fields requiring high precision RI measurement due to its advantages of low cost, ease of manufacture, high sensitivity, and temperature insensitivity.

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“…With further research, many novel structures have been demonstrated, such as cascaded structure [6,7], core-offset structure [8], taper structure [9], fiber loop mirror with a section of special fiber [10], etc. Among above structures, a fiber loop mirror (FLM) or Sagnac interferometer is a very attractive method for use in optical fiber sensing due to its remarkable advantages, such as low cost, great flexibility and good stability [11].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous measurement of torsion, strain and temperature using a side-leakage photonic crystal fiber loop mirror

Wang

Lou

Sheng

et al. 2016

Infrared Physics & Technology

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A fiber optic sensor for simultaneous measurement of multi-parameter is proposed. The fiber sensor is realized by a fiber loop mirror based on a piece of homemade side-leakage photonic crystal fiber. Affected by the group birefringence of the side-leakage photonic crystal fiber, which induced by the elliptical germanium-doped core and the linear side-leakage defect, the fiber loop mirror has different wavelength responses to torsion, strain and temperature at different interference fringe valleys. By monitoring the wavelength shifts of three selected valleys in the transmission spectrum, simultaneous measurement of torsion, strain and temperature is achieved. The maximal sensitivities to torsion, strain and temperature are 151.14 pm/°, 1 pm/με and 71 pm/°C, respectively.

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Simultaneous measurement of temperature and refractive index based on a Mach–Zehnder interferometer cascaded with a fiber Bragg grating

Cited by 66 publications

References 14 publications

One novel type of miniaturization FBG rotation angle sensor with high measurement precision and temperature self-compensation

One novel type of miniaturization FBG rotation angle sensor with high measurement precision and temperature self-compensation

High-Sensitivity and Temperature-Insensitive Refractometer Based on TNHF Structure for Low-Range Refractive Index Measurement

Simultaneous measurement of torsion, strain and temperature using a side-leakage photonic crystal fiber loop mirror

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