Optical Fiber-Tip Sensors Based on In-Situ µ-Printed Polymer Suspended-Microbeams

Mian Yao; Xia Ouyang; Jushuai Wu; A. Ping Zhang; Hwa-Yaw Tam; Alex Wai

doi:10.3390/s18061825

Optical Fiber-Tip Sensors Based on In-Situ µ-Printed Polymer Suspended-Microbeams

Mian Yao, Xia Ouyang, Jushuai Wu, A. Ping Zhang^*, Hwa-Yaw Tam, Alex Wai

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › peer-review

25 Citations (Scopus)

Abstract

Miniature optical fiber-tip sensors based on directly μ-printed polymer suspended-microbea ms are presented. With an in-house optical 3D μ-printing technology, SU-8 suspended-microbeams are fabricated in situ to form Fabry-Pérot (FP) micro-interferometers on the end face of standard single-mode optical fiber. Optical reflection spectra of the fabricated FP micro-interferometers are measured and fast Fourier transform is applied to analyze the cavity of micro-interferometers. The applications of the optical fiber-tip sensors for refractive index (RI) sensing and pressure sensing, which showed 917.3 nm/RIU to RI change and 4.29 nm/MPa to pressure change, respectively, are demonstrated in the experiments. The sensors and their optical μ-printing method unveil a new strategy to integrate complicated microcomponents on optical fibers toward ‘lab-on-fiber’ devices and applications.

Original language	English
Article number	1825
Number of pages	10
Journal	Sensors
Volume	18
Issue number	6
DOIs	https://doi.org/10.3390/s18061825
Publication status	Published - Jun 2018

Scopus Subject Areas

Analytical Chemistry
Information Systems
Atomic and Molecular Physics, and Optics
Biochemistry
Instrumentation
Electrical and Electronic Engineering

User-Defined Keywords

optical fiber-tip sensors
optical 3D µ-printing
refractive index sensors
gas-pressure sensors
lab-on-fiber

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10.3390/s18061825

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title = "Optical Fiber-Tip Sensors Based on In-Situ µ-Printed Polymer Suspended-Microbeams",

abstract = "Miniature optical fiber-tip sensors based on directly μ-printed polymer suspended-microbea ms are presented. With an in-house optical 3D μ-printing technology, SU-8 suspended-microbeams are fabricated in situ to form Fabry-P{\'e}rot (FP) micro-interferometers on the end face of standard single-mode optical fiber. Optical reflection spectra of the fabricated FP micro-interferometers are measured and fast Fourier transform is applied to analyze the cavity of micro-interferometers. The applications of the optical fiber-tip sensors for refractive index (RI) sensing and pressure sensing, which showed 917.3 nm/RIU to RI change and 4.29 nm/MPa to pressure change, respectively, are demonstrated in the experiments. The sensors and their optical μ-printing method unveil a new strategy to integrate complicated microcomponents on optical fibers toward {\textquoteleft}lab-on-fiber{\textquoteright} devices and applications.",

keywords = "optical fiber-tip sensors, optical 3D µ-printing, refractive index sensors, gas-pressure sensors, lab-on-fiber",

author = "Mian Yao and Xia Ouyang and Jushuai Wu and Zhang, {A. Ping} and Hwa-Yaw Tam and Alex Wai",

note = "Funding Information: This work was supported by the PolyU Strategic Development Special Project (grant no.: 1-ZVGB) and the PolyU General Research Fund (grant no.: G-YBLJ and 1-ZVHB). Publisher Copyright: {\textcopyright} 2018 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2018",

month = jun,

doi = "10.3390/s18061825",

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AU - Yao, Mian

AU - Ouyang, Xia

AU - Wu, Jushuai

AU - Zhang, A. Ping

AU - Tam, Hwa-Yaw

AU - Wai, Alex

N1 - Funding Information: This work was supported by the PolyU Strategic Development Special Project (grant no.: 1-ZVGB) and the PolyU General Research Fund (grant no.: G-YBLJ and 1-ZVHB). Publisher Copyright: © 2018 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2018/6

Y1 - 2018/6

N2 - Miniature optical fiber-tip sensors based on directly μ-printed polymer suspended-microbea ms are presented. With an in-house optical 3D μ-printing technology, SU-8 suspended-microbeams are fabricated in situ to form Fabry-Pérot (FP) micro-interferometers on the end face of standard single-mode optical fiber. Optical reflection spectra of the fabricated FP micro-interferometers are measured and fast Fourier transform is applied to analyze the cavity of micro-interferometers. The applications of the optical fiber-tip sensors for refractive index (RI) sensing and pressure sensing, which showed 917.3 nm/RIU to RI change and 4.29 nm/MPa to pressure change, respectively, are demonstrated in the experiments. The sensors and their optical μ-printing method unveil a new strategy to integrate complicated microcomponents on optical fibers toward ‘lab-on-fiber’ devices and applications.

AB - Miniature optical fiber-tip sensors based on directly μ-printed polymer suspended-microbea ms are presented. With an in-house optical 3D μ-printing technology, SU-8 suspended-microbeams are fabricated in situ to form Fabry-Pérot (FP) micro-interferometers on the end face of standard single-mode optical fiber. Optical reflection spectra of the fabricated FP micro-interferometers are measured and fast Fourier transform is applied to analyze the cavity of micro-interferometers. The applications of the optical fiber-tip sensors for refractive index (RI) sensing and pressure sensing, which showed 917.3 nm/RIU to RI change and 4.29 nm/MPa to pressure change, respectively, are demonstrated in the experiments. The sensors and their optical μ-printing method unveil a new strategy to integrate complicated microcomponents on optical fibers toward ‘lab-on-fiber’ devices and applications.

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KW - gas-pressure sensors

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Optical Fiber-Tip Sensors Based on In-Situ µ-Printed Polymer Suspended-Microbeams

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