High-sensitivity stress sensor based on Bragg grating in BDK-doped photosensitive polymer optical fiber

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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Polymer Optical Fiber Bragg Grating

Handbook of Smart Textiles ◽

10.1007/978-981-4451-68-0_27-1 ◽

2015 ◽

pp. 1-16

Author(s):

Shen Jing

Keyword(s):

Optical Fiber ◽

Fiber Bragg Grating ◽

Bragg Grating ◽

Polymer Optical Fiber ◽

Optical Fiber Bragg Grating

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Plastic Optical Fiber Sensor for Detection of Ethanol Concentrations

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.307.84 ◽

2020 ◽

Vol 307 ◽

pp. 84-89

Author(s):

Aisyah Hanim Surani ◽

Affa Rozana Abdul Rashid ◽

N. Arsad ◽

Amna Afiqah Nasution Hakim

Keyword(s):

Optical Fiber ◽

Evanescent Wave ◽

Optical Fiber Sensor ◽

High Sensitivity ◽

Deionized Water ◽

Plastic Optical Fiber ◽

Polymer Optical Fiber ◽

Ethanol Sensor ◽

Output Ratio ◽

Higher Sensitivity

An optimized study of tapered polymer optical fiber (POF) for measurement of different concentration of ethanol in deionized water (0.5%-3.5%) is proposed and demonstrated. This sensor operated based on evanescent wave absorption principle. The cladding of PMMA based POF is removed using organic solvents which can be used to create tapered POF. The unclad length around 1 cm and 3 cm as well as the waist diameters of POF in the range of 5 mm and 8 mm were compared for their efficiency as an ethanol sensor based on power output ratio values. Tapered POF with smaller waist diameter and longer tapered length showed higher sensitivity as ethanol sensor. Therefore, by tailoring the length and tapered diameter of POF, high sensitivity of ethanol sensor can be fabricated.

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Gas Pressure Sensor Based on BDK-Doped Polymer Optical Fiber

Micromachines ◽

10.3390/mi10110717 ◽

2019 ◽

Vol 10 (11) ◽

pp. 717 ◽

Cited By ~ 6

Author(s):

Xin Cheng ◽

Yi Liu ◽

Changyuan Yu

Keyword(s):

Optical Fiber ◽

Pressure Sensor ◽

Chemical Structure ◽

High Sensitivity ◽

Gas Pressure ◽

Air Pressure ◽

Response Behavior ◽

Polymer Optical Fiber ◽

The Stability ◽

Doped Polymer

This paper presents a high sensitivity gas pressure sensor with benzyl-dimethylketal (BDK)-doped polymer optical fiber Bragg grating (POFBG), whose sensitivity is up to 8.12 pm/kPa and 12.12 pm/kPa in positive and negative pressure atmosphere, respectively. The high sensitivity can be explained by its porous chemical structure. The stability and response behavior under air pressure atmosphere has also been investigated. The new understanding of the air pressure response principle and sensitivity difference for the presented sensor can be a worthy reference.

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