“…Nowadays, advanced fabrication techniques allow the incorporation of various nanomaterials for the tuning of sensing devices, including fiber-optic sensors [ 1 , 2 , 3 , 4 ]. Fiber-optic sensing devices can find application in many different fields of science such as chemistry (composition and content of various solutions) [ 1 , 2 , 5 , 6 ], biology [ 7 , 8 , 9 , 10 ] and physics [ 11 , 12 , 13 , 14 ]. Fiber-optics based sensors present a number of advantages, including high sensitivity, the ability to be used in demanding environments (narrow spaces, hazardous areas), as well as immunity to electromagnetic noise during operation [ 15 , 16 ].…”