Fiberoptic transmission of biological signals

This work presents a multiplexed transmission system for biological signals, making use of the advantages of fiberoptics as a transmission medium. The signals are pulse frequency modulated (PFM) at one end of the fiber and demodulated using the pase locked loop (PLL) technique at the other end. During tests two electrocardiogram (ECG) signals were transmitted. The signals recovered at the receptor presented very low noise and crosstalk. Following results from the test applied to the system are discussed along with possible expansions of the system which will enable transmission of eight simultaneous signals with one single fiber.