High-sensitivity pressure sensor based on fiber Bragg grating and metal bellows

Seepage pressure is the pressure of pore fluid inside soil, which directly influences the stability state of engineering structure. A differential fiber Bragg grating seepage pressure sensor is developed, in which two fiber Bragg gratings are respectively pasted on the top and bottom surfaces of the uniform intensity cantilever. Acted as the seepage pressure measurement cavity, the free end of metal bellows is connected to the cantilever girder free end. Under the pressure of pore fluid function, the engender axial displacement of metal bellows is converted to the deflection change of cantilever girder free end, which generates the wavelength shifts of two pasted fiber Bragg gratings. The experiment results of pressure loading and unloading show that the sensitivity of the sensor is 1.96 nm/ MPa, the repeatability error is 2.27% FS, and the nonlinear error is 1.7% FS.

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High-sensitivity pressure sensor using a shielded polymer-coated fiber Bragg grating

IEEE Photonics Technology Letters ◽

10.1109/68.924043 ◽

2001 ◽

Vol 13 (6) ◽

pp. 618-619 ◽

Cited By ~ 105

Author(s):

Ying Zhang ◽

Dejun Feng ◽

Zhiguo Liu ◽

Zhuanyun Guo ◽

Xiaoyi Dong ◽

...

Keyword(s):

Fiber Bragg Grating ◽

Pressure Sensor ◽

High Sensitivity ◽

Bragg Grating ◽

Coated Fiber

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High Sensitivity Polarimetric Optical Fiber Pressure Sensor Based on Tapered Polarization-Maintaining and Fiber Bragg Grating

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2019.16190 ◽

2019 ◽

Vol 19 (3) ◽

pp. 1403-1409 ◽

Cited By ~ 1

Author(s):

Sungwook Choi ◽

Seul-Lee Lee ◽

Jihoon Kim ◽

Sun Jae Jeong ◽

Min Seok Kim ◽

...

Keyword(s):

Optical Fiber ◽

Fiber Bragg Grating ◽

Pressure Sensor ◽

High Sensitivity ◽

Bragg Grating ◽

Polarization Maintaining

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High-sensitivity pressure sensor based on a fiber Bragg grating

10.1117/12.514684 ◽

2004 ◽

Cited By ~ 3

Author(s):

Hao-Jan Sheng ◽

Ming-Yue Fu ◽

Tzu-Chiang Chen ◽

Chia-Min Lin ◽

Wen-Fung Liu ◽

...

Keyword(s):

Fiber Bragg Grating ◽

Pressure Sensor ◽

High Sensitivity ◽

Bragg Grating

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Development of an Optical Fiber Sensor with a D-shaped Fiber Bragg Grating Integrated in a Loop-mirror Optical Fiber Laser as a High Sensitivity Refractometer

Communications in Physics ◽

10.15625/0868-3166/16014 ◽

2021 ◽

Vol 32 ◽

Author(s):

Binh Pham Thanh ◽

Thuy Van Nguyen ◽

Van Hoi Pham ◽

Huy Bui ◽

Thi Hong Cam Hoang ◽

...

Keyword(s):

Refractive Index ◽

Optical Fiber ◽

Fiber Laser ◽

Fiber Bragg Grating ◽

Limit Of Detection ◽

Optical Fiber Sensor ◽

High Sensitivity ◽

Optical Signal ◽

Bragg Grating ◽

Loop Mirror

In this paper, we report a new type of refractometer based on a D-shaped fiber Bragg grating (FBG) integrated in a loop-mirror optical fiber laser. This proposed sensor is used in wavelength interrogation method, in which the D-shaped FBG is applied as a refractive index (RI) sensing probe and a mirror to select mode of laser. The D-shaped FBG is prepared by the removal of a portion of the fiber cladding covering the FBG by means of side-polishing technique. The D-shaped FBG sensing probe integrated in a loop-mirror optical fiber laser with saturated pump technique, the characteristics of sensing signals have been improved to obtain stable intensity, narrower bandwidth and higher optical signal-to-noise ratio compare to normal reflection configuration. The limit of detection (LOD) of this sensor can be achieved to 2.95 x 10-4 RIU in the refractive index (RI) range of 1.42-1.44. Accordingly, we believe that the proposed refractometer has a huge potential for applications in biochemical-sensing technique.

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