PMMA mPOF Bragg gratings written in less than 10 min

Ivan-Lazar Bundalo, Kristian Nielsen, Christos Markos, Ole Bang

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


Fiber Bragg grating (FBG) writing in PMMA microstructured Polymer Optical Fibers (mPOFs) using the UV Phase Mask technique is a time consuming process requiring about 40 minutes to inscribe a grating in an undoped fiber. Here we demonstrate the FBG inscription with the writing times shorter than 10 min. By careful alligning and increasing the beam intensity in the core of the fiber, writing times as short as 6 minutes and 50 second were achieved. The FBGs were written in a 125 μm PMMA mPOF having 3-rings of holes, the reflection peaks were centred at 632.6 nm and have a reflectivity as high as 26 dB. We also demonstrate how the writing dynamics depends on the intensity of the writing beam.
Original languageEnglish
Title of host publicationProceedings of SPIE
PublisherSPIE - International Society for Optical Engineering
Publication date2014
Publication statusPublished - 2014
SeriesProceedings of the SPIE - The International Society for Optical Engineering


  • Fiber optics sensors,
  • Microstructured fibers
  • Gratings
  • Fiber characterization
  • Polymers
  • Bragg gratings
  • Fiber Bragg gratings

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