| 摘要 |
<p>The present invention relates to an actuator arrangement for exciting longitudinal displacement pulses, or waves, in an optical fibre. The arrangement comprises a bracket, a washer element, a piezo member arranged between the bracket and the washer element, and an optical fibre that is engaged with an extending through a passage in the washer element. The piezo member is operative, responsive to an applied voltage, to displace the washer element and the fibre engaged therewith, in the longitudinal direction of the fibre, with respect to the bracket. Thereby, a longitudinal displacement pulse may be excited in the optical fibre. The actuator arrangement may also operate as a sensor for sensing longitudinal displacements in optical fibres. A set-up and a method for repeatedly sending longitudinal displacement pulses through a length of optical fibre is also disclosed.</p> |
