Acoustic emission is an important physical phenomenon when materials are deformed and fractured due to inner distortion or outer loading. It is also a direct parameter to show the mechanical property of rocks. Detecting or monitoring acoustic emission is significant in rock material failure theory and engineering. Because electromagnetism ultrasonic detection implements have some disadvantages of poor interference immunity, low sensitivity and inferior reliability, acoustic emission detection based on fiber Bragg grating (FBG) sensor is put forward to monitoring rocks. The strain and ultrasonic detection principles of FBG sensors are analyzed, at the same time, experimental system based on FBG...