Measurements of milli-Newton surface tension forces with tilted fiber Bragg gratings

Changyu Shen; Chuan Zhong; Dejun Liu; Xiaokang Lian; Jianyao Zheng; Jingjing Wang; Yuliya Semenova; Gerald Farrell; Jacques Albert; John F. Donegan

doi:10.1364/OL.43.000255

Measurements of milli-Newton surface tension forces with tilted fiber Bragg gratings

Changyu Shen, Chuan Zhong, Dejun Liu, Xiaokang Lian, Jianyao Zheng, Jingjing Wang, Yuliya Semenova, Gerald Farrell, Jacques Albert, John F. Donegan

School of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Small lateral forces (lower than 0.1 N) cannot normally be measured with conventional single-mode fiber-based sensors because of the high value of their Young modulus (>70 GPa). Here we demonstrate the measurement of lateral forces in the range from 0.2 to 1.4 × 10−³ N with a tilted fiber Bragg grating (TFBG) in conventional single-mode fiber pushed against the surface tension (ST) of a bead of water. The measured transmission changes of individual cladding mode resonances of the TFBG corresponding to these force values are of the order of 29 dB. Separate measurements of the contact angle between the surface of the water and the fiber are used to calibrate the sensor with help from the known value of ST for water. Once calibrated, a TFBG can be used to measure unknown forces in the same range or to measure an unknown ST, provided a separate force measurement is available.

Original language	English
Pages (from-to)	255-258
Number of pages	4
Journal	Optics Letters
Volume	43
Issue number	2
DOIs	https://doi.org/10.1364/OL.43.000255
Publication status	Published - 15 Jan 2018

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title = "Measurements of milli-Newton surface tension forces with tilted fiber Bragg gratings",

abstract = "Small lateral forces (lower than 0.1 N) cannot normally be measured with conventional single-mode fiber-based sensors because of the high value of their Young modulus (>70 GPa). Here we demonstrate the measurement of lateral forces in the range from 0.2 to 1.4 × 10−3 N with a tilted fiber Bragg grating (TFBG) in conventional single-mode fiber pushed against the surface tension (ST) of a bead of water. The measured transmission changes of individual cladding mode resonances of the TFBG corresponding to these force values are of the order of 29 dB. Separate measurements of the contact angle between the surface of the water and the fiber are used to calibrate the sensor with help from the known value of ST for water. Once calibrated, a TFBG can be used to measure unknown forces in the same range or to measure an unknown ST, provided a separate force measurement is available.",

author = "Changyu Shen and Chuan Zhong and Dejun Liu and Xiaokang Lian and Jianyao Zheng and Jingjing Wang and Yuliya Semenova and Gerald Farrell and Jacques Albert and Donegan, {John F.}",

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T1 - Measurements of milli-Newton surface tension forces with tilted fiber Bragg gratings

AU - Shen, Changyu

AU - Zhong, Chuan

AU - Liu, Dejun

AU - Lian, Xiaokang

AU - Zheng, Jianyao

AU - Wang, Jingjing

AU - Semenova, Yuliya

AU - Farrell, Gerald

AU - Albert, Jacques

AU - Donegan, John F.

PY - 2018/1/15

Y1 - 2018/1/15

N2 - Small lateral forces (lower than 0.1 N) cannot normally be measured with conventional single-mode fiber-based sensors because of the high value of their Young modulus (>70 GPa). Here we demonstrate the measurement of lateral forces in the range from 0.2 to 1.4 × 10−3 N with a tilted fiber Bragg grating (TFBG) in conventional single-mode fiber pushed against the surface tension (ST) of a bead of water. The measured transmission changes of individual cladding mode resonances of the TFBG corresponding to these force values are of the order of 29 dB. Separate measurements of the contact angle between the surface of the water and the fiber are used to calibrate the sensor with help from the known value of ST for water. Once calibrated, a TFBG can be used to measure unknown forces in the same range or to measure an unknown ST, provided a separate force measurement is available.

AB - Small lateral forces (lower than 0.1 N) cannot normally be measured with conventional single-mode fiber-based sensors because of the high value of their Young modulus (>70 GPa). Here we demonstrate the measurement of lateral forces in the range from 0.2 to 1.4 × 10−3 N with a tilted fiber Bragg grating (TFBG) in conventional single-mode fiber pushed against the surface tension (ST) of a bead of water. The measured transmission changes of individual cladding mode resonances of the TFBG corresponding to these force values are of the order of 29 dB. Separate measurements of the contact angle between the surface of the water and the fiber are used to calibrate the sensor with help from the known value of ST for water. Once calibrated, a TFBG can be used to measure unknown forces in the same range or to measure an unknown ST, provided a separate force measurement is available.

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VL - 43

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EP - 258

JO - Optics Letters

JF - Optics Letters

IS - 2

ER -

Measurements of milli-Newton surface tension forces with tilted fiber Bragg gratings

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