Conference paper
LPG inscription in mPOF for optical sensing
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.
| Language: | English |
|---|---|
| Publisher: | SPIE - International Society for Optical Engineering |
| Year: | 2018 |
| Proceedings: | SPIE Photonics Europe 2018 |
| Series: | Proceedings of Spie - the International Society for Optical Engineering |
| ISBN: | 1510618880 , 1510618899 , 9781510618886 and 9781510618893 |
| ISSN: | 1996756x and 0277786x |
| Types: | Conference paper |
| DOI: | 10.1117/12.2306451 |
| ORCIDs: | Bang, Ole |
