| 摘要 |
<p>1. Interferometric sensor using optical fibres, of the type comprising a laser source, an interferometer the arms of which are formed by optical fibres, one of these arms comprising a measuring cell, and a detector at the output of the interferometer, a first coupler dividing the wave emitted by the laser source into two, characterized in that it comprises a fibre-optical reference arm (3) transmitting one part of the wave to a second coupler (4), a fibre-optical measuring arm (5) comprising at least one measuring cell (6), and having the other part of the wave passing through it, this measuring arm (5) terminating in a reflective surface (7) which sends a reflected wave back to the first coupler (2), a fibre-optical returning arm (8) associated with the first coupler (2) receiving and transmitting one of the parts of the wave reflected by the measuring arm (5) from the first coupler (2) to the second coupler (4), and a detector (10) at which the wave transmitted hy the returning arm (8) and the wave transmitted by the reference arm (3) interfere.</p> |
