| 摘要 |
FIELD: physics.SUBSTANCE: disclosed distributed fibre-optic sound wave detector includes an optical pulse emitting unit which causes incidence of an optical pulse on optical fibre, and a unit for receiving Rayleigh scattered light, which receives Rayleigh scattered light obtained within the optical fibre. The optical pulse emitting unit outputs an optical pulse modulated with a code sequence, having a given length based on the length of the optical fibre, and through which the optical pulse is divided into a plurality of elements of given width.EFFECT: high sensitivity and accuracy of detecting a sound wave.12 cl, 10 dwg |
