Effects of Solvent Etching on PMMA Microstructured Optical Fiber Bragg Grating

Jakob Janting, Jens Pedersen, Rune Inglev, Getinet Woyessa, Kristian Nielsen, Ole Bang

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Polymer Optical Fiber Bragg Gratings (POFBGs) can be solvent etched to achieve higher sensitivity sensors. To analyze the influence of etch on the mechanical and thermal performance of PMMA based microstructured POFBGs (mPOFBGs), we etched annealed and unannealed samples in pure acetone, while at the same time monitoring the induced Bragg wavelength shifts. Optical-thermodynamical interpretation of these shifts together with thermal and mechanical testing of etched fibers, reveal that solvent etching can lead to trapping of residual plasticizing solvent in the polymer matrix and consequently to change of Young's modulus and thermal instability of the etched mPOFBG. Removal of these solvent residuals by thermal treatment results in a stable linear response with a thermal sensitivity indistinguishable of that of the unetched mPOFBG. The maximum found change of Young's modulus due to acetone plasticization during etch is ∼5% for both unannealed and annealed mPOFBGs. The mPOFBG force sensitivity increases greatly with reduced diameter and the relatively small changes in strain sensitivity and Young's modulus introduced by the etching process in this case do not have a big effect.
Original languageEnglish
JournalJournal of Lightwave Technology
Volume37
Issue number18
Pages (from-to)4469 - 4479
ISSN0733-8724
DOIs
Publication statusPublished - 2019

Keywords

  • Etching
  • Fiber optics
  • Fiber Bragg gratings
  • Optical polymers
  • Optical sensors

Cite this

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title = "Effects of Solvent Etching on PMMA Microstructured Optical Fiber Bragg Grating",
abstract = "Polymer Optical Fiber Bragg Gratings (POFBGs) can be solvent etched to achieve higher sensitivity sensors. To analyze the influence of etch on the mechanical and thermal performance of PMMA based microstructured POFBGs (mPOFBGs), we etched annealed and unannealed samples in pure acetone, while at the same time monitoring the induced Bragg wavelength shifts. Optical-thermodynamical interpretation of these shifts together with thermal and mechanical testing of etched fibers, reveal that solvent etching can lead to trapping of residual plasticizing solvent in the polymer matrix and consequently to change of Young's modulus and thermal instability of the etched mPOFBG. Removal of these solvent residuals by thermal treatment results in a stable linear response with a thermal sensitivity indistinguishable of that of the unetched mPOFBG. The maximum found change of Young's modulus due to acetone plasticization during etch is ∼5{\%} for both unannealed and annealed mPOFBGs. The mPOFBG force sensitivity increases greatly with reduced diameter and the relatively small changes in strain sensitivity and Young's modulus introduced by the etching process in this case do not have a big effect.",
keywords = "Etching, Fiber optics, Fiber Bragg gratings, Optical polymers, Optical sensors",
author = "Jakob Janting and Jens Pedersen and Rune Inglev and Getinet Woyessa and Kristian Nielsen and Ole Bang",
year = "2019",
doi = "10.1109/JLT.2019.2902244",
language = "English",
volume = "37",
pages = "4469 -- 4479",
journal = "Journal of Lightwave Technology",
issn = "0733-8724",
publisher = "Institute of Electrical and Electronics Engineers",
number = "18",

}

Effects of Solvent Etching on PMMA Microstructured Optical Fiber Bragg Grating. / Janting, Jakob; Pedersen, Jens; Inglev, Rune; Woyessa, Getinet; Nielsen, Kristian; Bang, Ole.

In: Journal of Lightwave Technology, Vol. 37, No. 18, 2019, p. 4469 - 4479.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Effects of Solvent Etching on PMMA Microstructured Optical Fiber Bragg Grating

AU - Janting, Jakob

AU - Pedersen, Jens

AU - Inglev, Rune

AU - Woyessa, Getinet

AU - Nielsen, Kristian

AU - Bang, Ole

PY - 2019

Y1 - 2019

N2 - Polymer Optical Fiber Bragg Gratings (POFBGs) can be solvent etched to achieve higher sensitivity sensors. To analyze the influence of etch on the mechanical and thermal performance of PMMA based microstructured POFBGs (mPOFBGs), we etched annealed and unannealed samples in pure acetone, while at the same time monitoring the induced Bragg wavelength shifts. Optical-thermodynamical interpretation of these shifts together with thermal and mechanical testing of etched fibers, reveal that solvent etching can lead to trapping of residual plasticizing solvent in the polymer matrix and consequently to change of Young's modulus and thermal instability of the etched mPOFBG. Removal of these solvent residuals by thermal treatment results in a stable linear response with a thermal sensitivity indistinguishable of that of the unetched mPOFBG. The maximum found change of Young's modulus due to acetone plasticization during etch is ∼5% for both unannealed and annealed mPOFBGs. The mPOFBG force sensitivity increases greatly with reduced diameter and the relatively small changes in strain sensitivity and Young's modulus introduced by the etching process in this case do not have a big effect.

AB - Polymer Optical Fiber Bragg Gratings (POFBGs) can be solvent etched to achieve higher sensitivity sensors. To analyze the influence of etch on the mechanical and thermal performance of PMMA based microstructured POFBGs (mPOFBGs), we etched annealed and unannealed samples in pure acetone, while at the same time monitoring the induced Bragg wavelength shifts. Optical-thermodynamical interpretation of these shifts together with thermal and mechanical testing of etched fibers, reveal that solvent etching can lead to trapping of residual plasticizing solvent in the polymer matrix and consequently to change of Young's modulus and thermal instability of the etched mPOFBG. Removal of these solvent residuals by thermal treatment results in a stable linear response with a thermal sensitivity indistinguishable of that of the unetched mPOFBG. The maximum found change of Young's modulus due to acetone plasticization during etch is ∼5% for both unannealed and annealed mPOFBGs. The mPOFBG force sensitivity increases greatly with reduced diameter and the relatively small changes in strain sensitivity and Young's modulus introduced by the etching process in this case do not have a big effect.

KW - Etching

KW - Fiber optics

KW - Fiber Bragg gratings

KW - Optical polymers

KW - Optical sensors

U2 - 10.1109/JLT.2019.2902244

DO - 10.1109/JLT.2019.2902244

M3 - Journal article

VL - 37

SP - 4469

EP - 4479

JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

SN - 0733-8724

IS - 18

ER -