OPTICAL BIO SENSOR AND OPERATING METHOD THEREOF

摘要

Disclosed are an optical bio sensor for measuring the concentration of bio substances based on optical phenomenon and an operation method thereof. The optical bio sensor according to an embodiment of the present invention comprises a bio sensing part for receiving first and second light signals generated by phase-modulated light signals, outputting a sensing signal by transmitting the first light signal through a first light path having a sensing resonator, and outputting a reference signal by transmitting the second light signal through a second light path having a reference resonator; a detection part receiving the sensing signal and the reference signal, detecting the phase components of the sensing signal and the reference signal through signal demodulating operation, and detecting the phase difference between the sensing signal and the reference signal according to the detected phase components; and a signal processing part for calculating the concentration of bio substances based on the detected phase difference.