| 摘要 |
Laser microphone, laser-based microphone, and optical microphone utilizing mirrors having different properties. A laser microphone includes at least two mirrors: a front-side mirror, and a rear-side mirror. The reflectivity of the front-side mirror, is different from the reflectivity of the rear-side mirror; thereby increasing the efficiency or the accuracy of self-mixing of signals in the laser microphone. Additionally or alternatively, the front-side mirror has a first number of Distributed Bragg Reflector (DBR) layers; and the rear-side mirror has a second, different, number of DBR layers; thereby increasing the efficiency or the accuracy of self-mixing of signals in the laser microphone. |
