“…In particular, the development of fiber-optic, label-free biosensors is of special interest: they can be designed to be specific and selective, they show compact size and are capable to be point-of-care devices [1][2][3]. Within the applications of fiber-optic biosensors, the detection of DNA hybridization is of much interest, due to their specific capability to detect particular DNA sequences that might be of interest for environmental, biological or health applications, epidemic controls, diagnosis, drug research, etc.…”