Effects in ultrafast laser micromachining PMMA-based optical fibre grating

Chen Liu, Xianfeng Chen, Marcos R. Cardoso, Wei Zhang, David J. Webb

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ultrafast laser owns extreme small beam size and high pulse intensity which enable spatial localised modification either on the surface or in the bulk of materials. Therefore, ultrafast laser has been widely used to micromachine optical fibres to alter optical structures. In order to do the precise control of the micromachining process to achieve the desired structure and modification, investigations on laser parameters control should be carried out to make better understanding of the effects in the laser micromachining process. These responses are important to laser machining, most of which are usually unknown during the process. In this work, we report the real time monitored results of the reflection of PMMA based optical fibre Bragg gratings (POFBGs) during excimer ultraviolet laser micromachining process. Photochemical and thermal effects have been observed during the process. The UV radiation was absorbed by the PMMA material, which consequently induced the modifications in both spatial structure and material properties of the POFBG. The POFBG showed a significant wavelength blue shift during laser micromachining. Part of it attributed to UV absorption converted thermal energy whilst the other did not disappear after POFBG cooling off, which attributed to UV induced photodegradation in POF.

Original languageEnglish
Title of host publicationMicro-Structured and Specialty Optical Fibres IV
EditorsKyriacos Kalli, Alexis Mendez
Place of PublicationBellingham, WA (US)
PublisherSPIE
Number of pages6
ISBN (Print)978-1-5106-0131-4
DOIs
Publication statusPublished - 27 Apr 2016
EventMicro-Structured and Specialty Optical Fibres IV - Brussels, Belgium
Duration: 4 Apr 20166 Apr 2016

Publication series

NameSPIE Proceedings
PublisherSPIE
Volume9886
ISSN (Print)0277-786X
ISSN (Electronic)2410-9045

Conference

ConferenceMicro-Structured and Specialty Optical Fibres IV
CountryBelgium
CityBrussels
Period4/04/166/04/16

Fingerprint

Ultrafast Lasers
Ultrafast lasers
laser machining
Micromachining
Fiber Grating
Polymethyl Methacrylate
Optical Fiber
Optical fibers
Fiber Bragg gratings
Bragg Grating
optical fibers
Bragg gratings
gratings
Laser
Lasers
Excimer
lasers
Ultraviolet lasers
Thermal Effects
Photodegradation

Bibliographical note

-Chen Liu; Xianfeng Chen; Marcos R. Cardoso; Wei Zhang and David J. Webb; "Effects in ultrafast laser micromachining PMMA-based optical fibre grating", Proc. SPIE 9886, Micro-Structured and Specialty Optical Fibres IV, 98861O (April 27, 2016).

Copyright 2016. Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

DOI :http://dx.doi.org/10.1117/12.2230230

Keywords

  • Bragg grating
  • photodegradation
  • PMMA
  • polymer optical fibre

Cite this

Liu, C., Chen, X., Cardoso, M. R., Zhang, W., & Webb, D. J. (2016). Effects in ultrafast laser micromachining PMMA-based optical fibre grating. In K. Kalli, & A. Mendez (Eds.), Micro-Structured and Specialty Optical Fibres IV [98861O] (SPIE Proceedings; Vol. 9886). Bellingham, WA (US): SPIE. https://doi.org/10.1117/12.2230230
Liu, Chen ; Chen, Xianfeng ; Cardoso, Marcos R. ; Zhang, Wei ; Webb, David J. / Effects in ultrafast laser micromachining PMMA-based optical fibre grating. Micro-Structured and Specialty Optical Fibres IV. editor / Kyriacos Kalli ; Alexis Mendez. Bellingham, WA (US) : SPIE, 2016. (SPIE Proceedings).
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Liu, C, Chen, X, Cardoso, MR, Zhang, W & Webb, DJ 2016, Effects in ultrafast laser micromachining PMMA-based optical fibre grating. in K Kalli & A Mendez (eds), Micro-Structured and Specialty Optical Fibres IV., 98861O, SPIE Proceedings, vol. 9886, SPIE, Bellingham, WA (US), Micro-Structured and Specialty Optical Fibres IV, Brussels, Belgium, 4/04/16. https://doi.org/10.1117/12.2230230

Effects in ultrafast laser micromachining PMMA-based optical fibre grating. / Liu, Chen; Chen, Xianfeng; Cardoso, Marcos R.; Zhang, Wei; Webb, David J.

Micro-Structured and Specialty Optical Fibres IV. ed. / Kyriacos Kalli; Alexis Mendez. Bellingham, WA (US) : SPIE, 2016. 98861O (SPIE Proceedings; Vol. 9886).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Ultrafast laser owns extreme small beam size and high pulse intensity which enable spatial localised modification either on the surface or in the bulk of materials. Therefore, ultrafast laser has been widely used to micromachine optical fibres to alter optical structures. In order to do the precise control of the micromachining process to achieve the desired structure and modification, investigations on laser parameters control should be carried out to make better understanding of the effects in the laser micromachining process. These responses are important to laser machining, most of which are usually unknown during the process. In this work, we report the real time monitored results of the reflection of PMMA based optical fibre Bragg gratings (POFBGs) during excimer ultraviolet laser micromachining process. Photochemical and thermal effects have been observed during the process. The UV radiation was absorbed by the PMMA material, which consequently induced the modifications in both spatial structure and material properties of the POFBG. The POFBG showed a significant wavelength blue shift during laser micromachining. Part of it attributed to UV absorption converted thermal energy whilst the other did not disappear after POFBG cooling off, which attributed to UV induced photodegradation in POF.

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Liu C, Chen X, Cardoso MR, Zhang W, Webb DJ. Effects in ultrafast laser micromachining PMMA-based optical fibre grating. In Kalli K, Mendez A, editors, Micro-Structured and Specialty Optical Fibres IV. Bellingham, WA (US): SPIE. 2016. 98861O. (SPIE Proceedings). https://doi.org/10.1117/12.2230230