Effects in ultrafast laser micromachining PMMA-based optical fibre grating

Liu, Chen, Chen, Xianfeng, Cardoso, Marcos R., Zhang, Wei and Webb, David J. (2016). Effects in ultrafast laser micromachining PMMA-based optical fibre grating. IN: Micro-Structured and Specialty Optical Fibres IV. Kalli, Kyriacos and Mendez, Alexis (eds) SPIE Proceedings . BEL: SPIE.

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.

Publication DOI: https://doi.org/10.1117/12.2230230
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: -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
Event Title: Micro-Structured and Specialty Optical Fibres IV
Event Type: Other
Event Dates: 2016-04-04 - 2016-04-06
Uncontrolled Keywords: Bragg grating,photodegradation,PMMA,polymer optical fibre,Electronic, Optical and Magnetic Materials,Condensed Matter Physics,Computer Science Applications,Applied Mathematics,Electrical and Electronic Engineering
Full Text Link: http://proceedi ... ticleid=2519528
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2016-04-27
Authors: Liu, Chen
Chen, Xianfeng
Cardoso, Marcos R.
Zhang, Wei ( 0000-0002-3584-8541)
Webb, David J. ( 0000-0002-5495-1296)

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