Hybrid Miniature Fabry–Perot Sensor with Dual Optical Cavities for Simultaneous Pressure and Temperature Measurements

Bae, Hae-Young; Yémélé, David; Liu, Haijun; Olson, Douglas A.; Yu, Miao

doi:10.1109/jlt.2014.2308060

Cited by 101 publications

(57 citation statements)

References 30 publications

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“…With this selection, 20 sensors can be packed in an FPI array maintaining at least 10 dB selectivity between each peak (ρ = 0.175, η = 25 µm), or it is possible to expand the capacity up to 39 sensors (ρ = 0.0825, η = 15 µm) still maintaining at least 4 dB selectivity between each PSD peak, for SNR > 36 dB. These values are a great improvement over the 2-3 peaks detected so far with FFT [14][15], and lean towards closing the gap with FBG sensors, which operate typically with up to 20-80 sensors on the same 80 nm bandwidth used in FPI simulation. …”

Section: B Capacitymentioning

confidence: 94%

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Simultaneous Detection of Multiple Fiber-Optic Fabry–Perot Interferometry Sensors With Cepstrum-Division Multiplexing

Tosi

2016

J. Lightwave Technol.

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Increasing the capacity of an array of sensors is a major challenge in fiber-optic sensing networks. Whereas fiber Bragg grating (FBG) sensors can be discriminated in the spectrum domain, through the popular wavelength-divisionmultiplexing (WDM) approach, Fabry-Perot Interferometry (FPI) sensors have a broad spectrum and are not suitable for WDM. In this paper, a novel approach for the simultaneous detection of multiple FPI sensors is proposed. The key is decoding sensors in the optical cepstrum (spectrum of the optical spectrum) domain, using a Capon estimator. Subsequently, the small cepstrum shifts are accurately detected with a fast-phase correlation (FPC) method. This approach is labeled cepstrumdivision-multiplexing (CDM). CDM has been tested on a simulated FPI array, with a coarse wavelength grid typical of most FBG interrogators. Unambiguous and simultaneous detection of 20-39 sensors is achieved, improving over previous methods limited to 1-3 sensors; 0.04 nm accuracy on cavity length estimation has been achieved. A preliminary experimental demonstration has been set up to validate the CDM approach.Index Terms-Fabry-Perot Interferometry (FPI), fiber optic sensors (FOS), Extrinsic Fabry-Perot Interferometry (EFPI), sensor detection, optical fiber sensor networks, Capon estimator.

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Section: B Capacitymentioning

confidence: 94%

“…FPI decoding methods based on Fast Fourier Transform (FFT) [14] have typically applied for single, dual, or triple [15] cavity detection. Recently, the work of Barrera, et al [16] reported the fabrication and interrogation of serial interferometers, with an FFT-based method validated for up to 4 sensors.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Detection of Multiple Fiber-Optic Fabry–Perot Interferometry Sensors With Cepstrum-Division Multiplexing

Tosi

2016

J. Lightwave Technol.

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“…Various hybrid structured FPIs have been fabricated for concurrent measurement of temperature and pressure 12 , temperature and refractive index 13 , pressure and temperature 14, 15 , temperature and strain 16 . In 2012, Pevec S. et al .…”

Section: Introductionmentioning

confidence: 99%

Simultaneous measurement of transverse load and temperature using hybrid structured fiber-optic Fabry–Perot interferometer

Zhang

et al. 2017

Sci Rep

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We experimentally demonstrated a novel fiber-optic hybrid structured Fabry–Perot interferometer with special air-cavity for simultaneous measurement of transverse load and temperature. By the linear phase finite impulse response filters, the transverse load sensitivities of the air-cavity and the silica-cavity are 1272.71 pm/N and −53.07 pm/N, respectively, and temperature sensitivities of the air-cavity and silica-cavity are 1.1 pm/°C and 14 pm/°C. Thus, the different sensitivities of silica-cavity and air-cavity to transverse load and temperature indicate that such a structure can be used to simultaneously measure transverse load and temperature.

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“…Now the measurement principle of optical fiber temperature sensors include primarily wavelength shift of long-period fiber grating [1], coating with temperature-sensitive material on optical fiber surface [2], Fresnel reflection (temperature resolution 0.07°C) [3], Mach-Zehnder interferometer (temperature sensitivity 109 pm/°C) [4], Fabry-Perot interferometer (temperature sensitivity 2.9 nm/°C) [5]. Compared with the above sensors, FBG-based temperature sensors have been intensively studied due to its advantages such as high precision, simple structure, rapid response, etc [6]- [12].…”

Section: Introductionmentioning

confidence: 99%

A Highly Sensitive Temperature Sensor Based on Power Changes of Fiber Bragg Grating Pairs

Tang

Wang

Zhou

et al. 2015

IEEE Photon. Technol. Lett.

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A highly sensitive temperature sensor based on power change of double fiber Bragg gratings (FBGs) structure is proposed in this letter. It consists of two identical FBGs (FBG1, FBG2), in which the Bragg wavelength of FBG1 is modulated by the temperature and its reflecting light is injected into FBG2. Thus, the power difference of two peaks that appear in the transmission spectrum of FBG2 can be modulated by temperature around FBG1. By shifting the Bragg wavelength of FBG2, the sensor can achieve the segmental measurement of temperature. In the experiment, dynamic range of 25°C-135°C and sensitivity of 1.35 ± 0.02 dBm/°C have been achieved.Index Terms-Fiber Bragg grating, optical fiber sensor, power difference, temperature measurement.

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Hybrid Miniature Fabry–Perot Sensor with Dual Optical Cavities for Simultaneous Pressure and Temperature Measurements

Cited by 101 publications

References 30 publications

Simultaneous Detection of Multiple Fiber-Optic Fabry–Perot Interferometry Sensors With Cepstrum-Division Multiplexing

Simultaneous Detection of Multiple Fiber-Optic Fabry–Perot Interferometry Sensors With Cepstrum-Division Multiplexing

Simultaneous measurement of transverse load and temperature using hybrid structured fiber-optic Fabry–Perot interferometer

A Highly Sensitive Temperature Sensor Based on Power Changes of Fiber Bragg Grating Pairs

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