1 Department of Photonics Engineering, Technical University of Denmark2 Fiber Sensors and Supercontinuum Generation, Department of Photonics Engineering, Technical University of Denmark3 Department of Mechanical Engineering, Technical University of Denmark4 Manufacturing Engineering, Department of Mechanical Engineering, Technical University of Denmark5 Singapore Institute of Manufacturing Technology6 University of Patras7 Brüel & Kjær A/S8 Ibsen Photonics A/S
In this paper we present our latest work on Fiber Bragg Gratings (FBGs) in microstructured polymer optical fibers (mPOFs) and their application as strain sensing transducers in devices, such as accelerometers and microphones. We demonstrate how the cross-sensitivity of the FBG to temperature is eliminated by using dual-FBG technology and how mPOFs fabricated from different grades of TOPAS with glass transition temperatures around 135 degrees C potentially allow high-temperature humidity insensitive operation. The results bring the mPOF FBG closer to being a viable technology for commercial applications requiring high sensitivity due to the low Young's Modulus of polymer.
Proceedings of Spie, the International Society for Optical Engineering, 2012, Vol 8421