Temperature and pressure monitoring of the human body based fiber Bragg grating and optical crystal fiber

Fiber optics has been embraced in the field of sensors. in this paper, uniform fiber Bragg grating have been used to measurement the pressure and temperature range of human body, where these sensors are rapidly utilized in the field of sensing technologies due to of its inherent benefits like Compact size, rapid response, distributed sensing, and electromagnetic immunity.in addition the photonic crystal fiber (PCF) also used in field of sensing applications such as monitor the temperature and pressure. The result indicated that the FBG and PCF are extremely sensitive to the variations of pressure and temperature. where the sensitivity of increasing the temperature range for each transmission and reflection FBG reached to (22pm/C° and 10pm/C°) respectively and the sensitivity of decreasing the temperature range for each transmission and reflection FBG reached to( -21pm/C° and -8pm/C°). The sensitivity of PCF when increasing and decreasing temperature range was (70pm/C° and -80pm/C°). The sensitivity of FBG pressure for high ,pre high ,ideal ,low, very low reached to (2pm/mmHg, 3pm/mmHg, 4pm/mmHg, 7pm/mmHg, 6pm/mmHg) respectively.