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FR-3168262-A1 - Temperature sensor with increased sensitivity

FR3168262A1FR 3168262 A1FR3168262 A1FR 3168262A1FR-3168262-A1

Abstract

A temperature sensor comprising: an optical fiber (3) having a segment containing a Bragg grating (4); a capillary (1) surrounding said segment; and a filler material (2) between the optical fiber and the capillary. The filler material (2) has a coefficient of thermal expansion strictly greater than that of the optical fiber and adheres to the fiber but not to the capillary, such that, when it expands due to temperature, the filler material exerts axial tension on the Bragg grating. Alternatively, the capillary has a coefficient of thermal expansion strictly greater than that of the optical fiber, and the filler material adheres to both the capillary and the optical fiber, such that, when it expands due to temperature, the capillary exerts axial tension on the Bragg grating through the filler material. Figure for the abstract: Fig. 2

Inventors

  • Nassim SALHI
  • Minh Chau Phan Huy

Assignees

  • SAFRAN

Dates

Publication Date
20260508
Application Date
20241107