Simultaneous measurement of strain and temperature by means of polarization division multiplexing optical frequency domain reflectometry

Omichi, Koji; Terada, Yoshihiro; Sakamoto, Akira; Hirafune, Shunichiro; Wada, Daichi; Murayama, Hideaki; Igawa, Hirotaka

doi:10.1117/12.834233

Cited by 4 publications

(5 citation statements)

References 3 publications

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“…At wavelength of 1550 nm, the attenuation is 0.88 dB/km, the mode birefringence is 5.5×10 -4 . Because we optimized SAP interval, the trial PANDA fiber has low attenuation and high birefringence for sensors to measure distributed strain and temperature simultaneously with high accuracy in the only one fiber [1]. The attenuation spectrum of the trial PANDA fiber is shown in Fig.…”

Section: Optical Characteristicsmentioning

confidence: 99%

“…In general, optical fiber sensing needs two fibers, that is, one is for strain and the other one is for temperature. A polarization maintaining and absorption reducing (PANDA) fiber is a kind of polarization-maintaining fibers and it allows high accuracy simultaneous measurement of strain and temperature in the only one fiber [1,2]. A flexible laying of optical fiber extends the usage location of sensors, for example small and not gently curved areas.…”

Section: Introductionmentioning

confidence: 99%

“…This mode birefringence indicates an index of polarization maintaining capability. The higher mode birefringence is, the more sensitive simultaneous measurement is [1]. The dimension and optical characteristics of the conventional and the target PANDA fibers are shown in Table 1.…”

Section: Introductionmentioning

confidence: 99%

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Polarization-maintaining fiber with wide temperature resistance

et al. 2012

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We have developed a polarization-maintaining fiber with wide temperature resistance and low bending loss. Attenuation, polarization crosstalk, and bending loss at 1550 nm of the fiber are 0.88 dB/km, -24 dB/100m, 1/100 as large as those of conventional one (bending diameter = 20 mm, 10 turns), respectively. Besides, the polarization crosstalk is less than -24 dB/100m at a temperature in the range of -60 to +300 o C. As a result this fiber can be used over a wide range of temperature.

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Section: Optical Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Polarization-maintaining fiber with wide temperature resistance

et al. 2012

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“…To overcome this cross-sensitivity issue, various measurement methods have been presented and used. A combination of multiple gratings, 25) an in-fiber short Fabry-Perot cavity, 26,27) an FBG written in a high-birefringence fiber, [28][29][30] and some FBGs with special structures 31,32) were presented as sensor heads for the simultaneous measurement of temperature and strain.…”

Section: Introductionmentioning

confidence: 99%

Fast and accurate full-spectrum interrogation for fiber Fabry–Perot interferometric sensor consisting of Bragg gratings in polarization maintaining fiber

Wada¹,

Tanaka²,

Takahashi³

2018

Jpn. J. Appl. Phys.

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A measurement method for many sharp transmittance peaks of a fiber Fabry–Perot interferometer (FPI) with high resolution in a short time is proposed. Using the proposed method, temperature and strain dependences of an FPI constructed using polarization maintaining type fiber Bragg grating (PM-FBG-FPI) are evaluated. By detecting wavelength shift occurring in many peaks of a PM-FBG-FPI with high resolution, it is possible to quantitatively evaluate a slight shift coefficient difference due to the difference in resonance order of each peak. Simultaneous measurement resolution of temperature and strain by the PM-FBG-FPI sensor is also improved by using the average value of the wavelength shift detected at many peaks. The resulting high-resolution measurements are demonstrated experimentally.

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“…To remove this cross-sensitivity issue, various measurement methods have been presented and used. A combination of multiple gratings, 25) an in-fiber short Fabry-Perot cavity, 26,27) an FBG written in a high-birefringence fiber, [28][29][30] and some FBGs with special structures 31,32) were presented as sensor heads for the simultaneous measurement of temperature and strain.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous measurement of strain and temperature using a Fabry–Perot interferometer consisting of Bragg gratings in polarization-maintaining fiber and current-modulated laser diodes

Wada¹,

Tanaka²,

Takahashi³

2017

Jpn. J. Appl. Phys.

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A fast and high-resolution simultaneous measurement of strain and temperature using an optical fiber sensor is presented. Temperature and strain can be measured simultaneously by using two types of reflection spectra of a Fabry–Perot interferometer consisting of fiber Bragg gratings in a polarization-maintaining fiber (PM-FBG-FPI). The fine structure of a reflection spectrum of the PM-FBG-FPI enables the high-resolution detection of wavelength shifts. We present a fast interrogation method with current modulation of a laser diode for PM-FBG-FPI sensors. The resulting fast measurement is demonstrated experimentally.

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Simultaneous measurement of strain and temperature by means of polarization division multiplexing optical frequency domain reflectometry

Cited by 4 publications

References 3 publications

Polarization-maintaining fiber with wide temperature resistance

Polarization-maintaining fiber with wide temperature resistance

Fast and accurate full-spectrum interrogation for fiber Fabry–Perot interferometric sensor consisting of Bragg gratings in polarization maintaining fiber

Simultaneous measurement of strain and temperature using a Fabry–Perot interferometer consisting of Bragg gratings in polarization-maintaining fiber and current-modulated laser diodes

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