| 摘要 |
<p>There is described an optical acoustic sensor (110) that is pressure-compensated for operation in high-pressure environments such as the deep sea and that may be employed in multi-sensor arrays. The sensor (110) includes an acoustically responsive diaphragm (116) that is illuminated by light conducted through an optical fiber (112) and that reflects the light back into the fiber (112). Light waves reflected by the diaphragm (116) and fiber end (114) interfere, and the resulting interference is conducted by the optical fiber (112) to a photodetector (60) and associated signal processing electronics such as a phase generated carrier demodulator. Pressure compensation is provided to equalize the static pressure on both sides of the diaphragm (116). Additionally, an array of sensors (310) is described that employs optical time division multiplexing.</p> |
