Fiber-optic refractometer based on a phase-shifted fiber Bragg grating on a side-hole fiber

Zhang, Qi; Hu, Lei; Qi, Yuefeng; Liu, Guigen; Ianno, N. J.; Han, Ming

doi:10.1364/oe.23.016750

Cited by 26 publications

(9 citation statements)

References 28 publications

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“…When the temperature was between 30 °C and 100 °C, the CTE was between 5.19 × 10 −7 /°C and 5.48 × 10 −7 /°C, TOC

was between 6.69 × 10 −6 /°C and 6.89 × 10 −6 /°C, and

was between 5.8 × 10 −6 /°C and 5.97 × 10 −6 /°C, which agreed well with the theoretical values at room temperature [ 19 , 20 , 21 ]. Thus, the curve equation could be used for silica-based FBG standardization procedures at high temperatures.…”

Section: Resultssupporting

confidence: 79%

A IR-Femtosecond Laser Hybrid Sensor to Measure the Thermal Expansion and Thermo-Optical Coefficient of Silica-Based FBG at High Temperatures

Yang

et al. 2018

Sensors

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In this paper, a hybrid sensor was fabricated using a IR-femtosecond laser to measure the thermal expansion and thermo-optical coefficient of silica-based fiber Bragg gratings (FBGs). The hybrid sensor was composed of an inline fiber Fabry-Perot interferometer (FFPI) cavity and a type-II FBG. Experiment results showed that the type-II FBG had three high reflectivity resonances in the wavelength ranging from 1100 to 1600 nm, showing the peaks in 1.1, 1.3 and 1.5 μm, respectively. The thermal expansion and thermo-optical coefficient (1.3 μm, 1.5 μm) of silica-based FBG, under temperatures ranging from 30 to 1100 °C, had been simultaneously calculated by measuring the wavelength of the type-II FBG and FFPI cavity length.

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“…When the temperature was between 30 °C and 100 °C, the CTE was between 5.19 × 10 −7 /°C and 5.48 × 10 −7 /°C, TOC

was between 6.69 × 10 −6 /°C and 6.89 × 10 −6 /°C, and

Section: Resultssupporting

confidence: 79%

A IR-Femtosecond Laser Hybrid Sensor to Measure the Thermal Expansion and Thermo-Optical Coefficient of Silica-Based FBG at High Temperatures

Yang

et al. 2018

Sensors

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“…Theoretical calculations, however, pre-dicted the RI sensitivity of 101 nm/RIU when using a 2.7-µm core fibre. Other than the aforementioned modifications to standard FBGs, there are also phase-shift FBGs [51,282,283] and birefringent FBG [284][285][286][287] applied for sensing.…”

Section: Fibre Gratingmentioning

confidence: 99%

Optical Refractive Index Sensors with Plasmonic and Photonic Structures: Promising and Inconvenient Truth

Bai

Zhou

et al. 2019

Advanced Optical Materials

363

193

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Optical sensors are widely used for refractive index measurement in chemical, biomedical and food processing industries. Due to specific field distribution of the resonances excited, optical sensors provide high sensitivity to ambient refractive index variations. The sensitivity of optical sensor is highly dependent on material and structure of the sensor. Here, we review six major categories of optical refractive index sensors using plasmonic and photonic structures: (i) metal-based propagating plasmonic eigenwave structures, (ii) metal-based localized plasmonic eigenmode structures, (iii) dielectric-based propagating photonic eigenwave structures, (iv) dielectric-based localized photonic eigenmode structures, (v) advanced hybrid structures, and (vi) 2D material integrated structures. Representative configurations working in the wavelength range of 400−2000 nm will be selected and compared in terms of bulk refractive index sensitivities, figure of merits and working wavelengths. A technology map is established in order to define the standard and development trend for optical refractive index sensors.

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“…Due to the novel internal configuration of this fiber, SHF has become a research hotspot in the field of fiber sensing in recent years. And many sensor structures based on SHF have been reported, such as long-period fiber grating [1], fiber Bragg grating [2], Sagnac interferometer [3], Fabry–Perot Interferometer [4,5], Mach–Zehnder Interferometer [6], and Michelson Interferometer [7]. However, the research on the use of SHF integrated electro-optical materials for the fabrication of all-fiber electro-optic functional devices has hardly been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Liquid-Crystal-Filled Side-hole Fiber for High-Sensitivity Temperature and Electric Field Measurement

et al. 2019

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We propose a highly sensitive sensor based on a nematic liquid-crystal-filled side-hole fiber. The liquid crystal is precisely filled into an air hole of the optical fiber using a method of manually gluing in the fusion splicer. Due to the coupling between the liquid crystal waveguide and the fiber core, multiple response dips appear in the transmission spectrum of the device. When an external temperature or electric field variation is applied to the liquid crystal and its refractive index changes, the transmission spectrum of this device will shift accordingly. Temperature and electric field response tests were performed on the device in the experiment, and the obtained temperature and electric field sensitivities were as high as −1.5 nm/°C and 3.88 nm/Vpp, respectively. For the exhibited advantages of being easy to manufacture, low cost, and high sensitivity, the proposed sensor is very promising for actual application in temperature or weak electric field monitoring.

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Fiber-optic refractometer based on a phase-shifted fiber Bragg grating on a side-hole fiber

Cited by 26 publications

References 28 publications

A IR-Femtosecond Laser Hybrid Sensor to Measure the Thermal Expansion and Thermo-Optical Coefficient of Silica-Based FBG at High Temperatures

A IR-Femtosecond Laser Hybrid Sensor to Measure the Thermal Expansion and Thermo-Optical Coefficient of Silica-Based FBG at High Temperatures

Optical Refractive Index Sensors with Plasmonic and Photonic Structures: Promising and Inconvenient Truth

Liquid-Crystal-Filled Side-hole Fiber for High-Sensitivity Temperature and Electric Field Measurement

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