High Temperature Sapphire Optical Fiber Sensor

Abstract

A sapphire fiber optic sensor for ultra-high temperature is developed, which owns the advantages of high temperature tolerance and compact. The detecting fiber is manufactured by fusing the sapphire fiber for detector head. The developed infrared radiation light is detected and the high temperature optical fiber sensor is placed in the ultra-high temperature furnace. The sensor signal will be transmitted to the display device through a photoelectric conversion module, and data acquisition module. As a result, the temperature response sensitivity is 2.292 uV1/2/K The measurement results show that the repeatability of the sensor is good. The maximum temperature measured by the sensor is 1823 K. The sensor can withstand 10 hours at high temperature and the error is less than 1 %. The development of common optical fiber sensor can stably exist at high-temperature. The sensor owns the advantage of simple, compact, easy to fabricate, what’s more, it can tolerate ultrahigh temperature for a long time.

Keywords

• temperature measurement
• sapphire optical fiber
• optical fiber sensor
• high temperature sensing