Temperature fiber Bragg grating based sensor for respiration monitoring

In this paper a new concept of human breath detection by means of fiber Bragg grating (FBG) based temperature sensor is reported. In presented approach, temperature of exhaled air is directly measured by FBG, and its Bragg wavelength changes allow for determine breathing rate. Experimental results of comparison the FBG sensor with electronic one, show significant advantages of our solution, especially when faster and/or plate breathing is detected. Another advantage of proposed fiber Bragg grating based breathing rate sensor is its ability to work in the high electromagnetic field environment, for example during the magnetic resonance imaging.