Study on ocean temperature and depth measurement system based on fiber Bragg grating

Ocean temperature and depth are important parameters. At present ocean temperature and depth measurement almost depend on electric signal inspection, so the sensor is not safety in the water.In order to overcome this shortage and improve measurement veracity and safety, a new ocean temperature and depth inspection system was presented based on fiber Bragg grating sensor with its advantages of all optic sensors, underwater safety and feasibility of sensor network, etc.Its measurement principle was described; its system and sensor structure was designed and manufactured.The experiments proved that sensor's linearity was very good and its value was up to 0.9999.It provides a new way to detect ocean temperature and depth.