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Proceedings Paper

LPG inscription in mPOF for optical sensing
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Paper Abstract

We demonstrate a long period grating (LPG) inscription in microstructured polymer optical fibers (mPOFs) using a single 248 nm UV laser pulse of 15 ns duration for every inscription point using a point by point technique with total length of 25 mm. The fabrication time indicates shortening for a single coupling point (15 ns against 42 s reported in literature). A grating with 20 dB transmission dip has been fabrication by using two UV pulses for each coupling point. The device has been fabricated in mPOF with a core that has been doped with benzyl dimethyl ketal (BDK) for photosensitivity increase. The strain and temperature responses of the fabricated gratings under different conditions have been characterized in order to assess the viability for sensing applications. Better performance was achieved with suitable post annealing process of the gratings.

Paper Details

Date Published: 9 May 2018
PDF: 7 pages
Proc. SPIE 10681, Micro-Structured and Specialty Optical Fibres V, 1068108 (9 May 2018); doi: 10.1117/12.2306451
Show Author Affiliations
Rui Min, Univ Politècnica de València (Spain)
Carlos Marques, Instituto de Telecomunicações (Portugal)
I3N (Portugal)
Univ. de Aveiro (Portugal)
Ole Bang, DTU Fotonik (Denmark)
Beatriz Ortega, Univ. Politècnica de València (Spain)

Published in SPIE Proceedings Vol. 10681:
Micro-Structured and Specialty Optical Fibres V
Kyriacos Kalli; Alexis Mendez; Christian-Alexander Bunge, Editor(s)

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