Structured fiber optic sensor incorporating a tunable Vernier effect laser emission device

摘要

The invention relates to a structured optical fiber sensor, comprising a light source (1), a detection system (2) and a Bragg grating optical fiber (3) connected to said source and to said system. The light source is a wavelength tunable laser emission device (1) which comprises a cavity (CA) delimited by a first and a second Sagnac mirror (M1, M2). The cavity comprises an amplifying medium (MA) and a tunable spectral filter using the Vernier effect (F), said filter (F) comprising at least three resonant rings (R1, R2, RN-1, RN) arranged in cascade, each resonant ring incorporating a wavelength-tunable reflectivity (MBR) loop mirror. Figure for the abstract: Figure 1