Simultaneous measurement of strain and temperature with high sensing accuracy

Kim, Hyun‐Min; Nam, Hochul; Moon, Dae Seung; Kim, Young Ho; Lee, Byeong Ha; Chung, Youngjoo

doi:10.1109/oecc.2009.5219750

Cited by 3 publications

(6 citation statements)

References 8 publications

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“…Another beneficial point of the SI-based sensors is the simultaneous sensing capability with the help of other fiber optic devices [80–85]. Figure 12(a) shows the experimental setup of hybrid Sagnac-MZI sensor based on a PMF and an LPG pair for measuring temperature and strain simultaneously [85].…”

Section: Types Of Interferometric Fiber Optic Sensorsmentioning

confidence: 99%

“…Figure 12(a) shows the experimental setup of hybrid Sagnac-MZI sensor based on a PMF and an LPG pair for measuring temperature and strain simultaneously [85]. The fiber loop was composed by cascading a piece of PMF and a pair of LPGs within a fiber loop.…”

Section: Types Of Interferometric Fiber Optic Sensorsmentioning

confidence: 99%

“…As illustrated in Figure 12(a), the sensing fiber was fixed at a computer-controlled stage for the strain measurement and also put into an oven for the temperature measurement. The measured transmission spectrum is presented in Figure 12(b) [85]. We can see two interference signals within the interesting wavelength range.…”

Section: Types Of Interferometric Fiber Optic Sensorsmentioning

confidence: 99%

“…( a ) Experimental setup of the Sagnac interferometric sensor combined with an LPG pair MZI sensor, and ( b ) the measured transmission spectrum [85]. It can measure temperature and strain simultaneously.…”

Section: Figurementioning

confidence: 99%

“…From their different sensitivities, the temperature and the strain applied on the sensor could be separated [85]. …”

Section: Figurementioning

confidence: 99%

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Interferometric Fiber Optic Sensors

Lee

Kim

Park

et al. 2012

Sensors

579

290

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Fiber optic interferometers to sense various physical parameters including temperature, strain, pressure, and refractive index have been widely investigated. They can be categorized into four types: Fabry-Perot, Mach-Zehnder, Michelson, and Sagnac. In this paper, each type of interferometric sensor is reviewed in terms of operating principles, fabrication methods, and application fields. Some specific examples of recently reported interferometeric sensor technologies are presented in detail to show their large potential in practical applications. Some of the simple to fabricate but exceedingly effective Fabry-Perot interferometers, implemented in both extrinsic and intrinsic structures, are discussed. Also, a wide variety of Mach-Zehnder and Michelson interferometric sensors based on photonic crystal fibers are introduced along with their remarkable sensing performances. Finally, the simultaneous multi-parameter sensing capability of a pair of long period fiber grating (LPG) is presented in two types of structures; one is the Mach-Zehnder interferometer formed in a double cladding fiber and the other is the highly sensitive Sagnac interferometer cascaded with an LPG pair.

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Section: Types Of Interferometric Fiber Optic Sensorsmentioning

confidence: 99%

Section: Types Of Interferometric Fiber Optic Sensorsmentioning

confidence: 99%

Section: Types Of Interferometric Fiber Optic Sensorsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

“…From their different sensitivities, the temperature and the strain applied on the sensor could be separated [85]. …”

Section: Figurementioning

confidence: 99%

See 3 more Smart Citations

Interferometric Fiber Optic Sensors

Lee

Kim

Park

et al. 2012

Sensors

579

290

View full text Add to dashboard Cite

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Bragg Grating Assisted Sagnac Interferometer in SiO2-Al2O3-La2O3 Polarization-Maintaining Fiber for Strain–Temperature Discrimination

Kudinova

et al. 2020

Sensors

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Polarization-maintaining fibers (PMFs) have always received great attention in fiber optic communication systems and components which are sensitive to polarization. Moreover, they are widely applied for high-accuracy detection and sensing devices, such as fiber gyroscope, electric/magnetic sensors, multi-parameter sensors, and so on. Here, we demonstrated the combination of a fiber Bragg grating (FBG) and Sagnac interference in the same section of a new type of PANDA-structure PMF for the simultaneous measurement of axial strain and temperature. This specialty PMF features two stress-applied parts made of lanthanum-aluminum co-doped silicate (SiO2-Al2O3-La2O3, SAL) glass, which has a higher thermal expansion coefficient than borosilicate glass used commonly in commercial PMFs. Furthermore, the FBG inscribed in this SAL PMF not only aids the device in discriminating strain and temperature, but also calibrates the phase birefringence of the SAL PMF more precisely thanks to the much narrower bandwidth of grating peaks. By analyzing the variation of wavelength interval between two FBG peaks, the underlying mechanism of the phase birefringence responding to temperature and strain is revealed. It explains exactly the sensing behavior of the SAL PMF based Sagnac interference dip. A numerical simulation on the SAL PMF’s internal stress and consequent modal effective refractive indices was performed to double confirm the calibration of fiber’s phase birefringence.

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Implementation of Pressure Sensor of Optical Fiber Using Optical Interferometer

Al-Ithawi

Hadi

2020

DDF

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In present work, two types of Interferometric Fiber Optic Sensor (Fabry – Perot & Modal Sensor) have been demonstrate and investigated. The main parameter studied of this contribute is the sensitivity, the strain could be induced by make a stress on the optical fiber. The strain effect at the fiber due to variation of the intensity in the output of the optical fiber. Then, the modes of electromagnetic waves that propagate in the fiber could be analyzed to determine the sensitivity depend on fringe rates. I conclude from this study the Extrinsic Fabry – Perot Interferometry structure is more sensitive than Modal Sensor.

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Simultaneous measurement of strain and temperature with high sensing accuracy

Cited by 3 publications

References 8 publications

Interferometric Fiber Optic Sensors

Interferometric Fiber Optic Sensors

Bragg Grating Assisted Sagnac Interferometer in SiO2-Al2O3-La2O3 Polarization-Maintaining Fiber for Strain–Temperature Discrimination

Implementation of Pressure Sensor of Optical Fiber Using Optical Interferometer

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