Permanent Bragg wavelength tuning of polymer optical fibre Bragg grating (POFBG) at longer wavelengths has been demonstrated for the first time utilising the thermal annealing process. In general, exposing the polymer material above its β-Transition temperature, the fibre shrinks in length, the Bragg grating period becomes shorter and the Bragg wavelength shifts permanently to shorter wavelengths. In this work, a positive tuning of Bragg wavelength has been shown to be feasible when the polymer fibre is stretched during its thermal exposure. The results show that the degree of Bragg wavelength tuning strongly depends on the applying fibre strain or equivalently stress. The work presented in this paper can be used to multiplex POFBGs at any desirable wavelength.
|Title of host publication||Third International Conference on Applications of Optics and Photonics|
|Publication status||Published - 22 Aug 2017|
|Event||3rd Triennial International Conference on Applications of Optics and Photonics - Faro, Portugal|
Duration: 8 May 2017 → 12 May 2017
|Conference||3rd Triennial International Conference on Applications of Optics and Photonics|
|Period||8/05/17 → 12/05/17|
Bibliographical noteCopyright: 2017, Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic 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.
Funding: People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme FP7/2007-2013/ under REA grant agreement No. 608382.
- Bragg grating
- Bragg wavelength
- Polymer optical fibre
- Positive tuning
- Thermal annealing