OPTICAL DISTRIBUTED SENSING DEVICE AND METHOD FOR SIMULTANEOUS MEASUREMENTS OF TEMPERATURE AND STRAIN

摘要

The present invention concerns an optical distributed sensing device, comprising (i) a distributed sensor with one or a plurality of polarization maintaining sensing optical fiber(s) (10) arranged along a same path and having respectively a first and a second birefringent axis, and (ii) transfer means arranged so as (i) to transfer into said sensing optical fiber(s) (10) at least a linearly polarized optical pulsed wave (17) aligned with a first birefringent axis, and a linearly polarized optical pulsed wave (17) aligned with a second birefringent axis (ii) and to transfer toward detection means (23, 50) measurement optical waves emerging from said sensing optical fiber(s) (10) and resulting respectively from scattering interactions along said first and second birefringent axes. The present invention concerns also a method implemented in the device.