Ultra wideband filmless optical microphone

The ultra wideband membraneless optical microphone adopts unique technology to achieve optical detection based on the internal refractive index change of Fabry Perot standard. The detection frequency range of this acoustic sensor is extremely wide, starting from 10Hz, covering up to 1MHz, and even up to 10MHz in underwater environments. This optical microphone provides a breakthrough solution in ultrasonic testing, acoustic process monitoring, and acoustic field characterization. In process monitoring, the sound and light receiver can capture abnormal situations in the manufacturing process in real time, such as laser welding, forming, cutting, or additive manufacturing (including processes such as LPBF, WAAM, DED, etc.). In addition, the device is also highly suitable for crack detection. Therefore, this technology is widely used in various industrial fields such as aerospace, automotive, electronics, and semiconductor manufacturing.