Ring laser for sensing angular deflection

An angular deflection laser sensor in ring configuration is presented, based on a wavelength selective filter (WSF), which was manufactured by splicing a segment of thin core fiber (Thin-Core Fiber, TCF) between two segments of single-mode fiber SMF-28 (Single-Mode Fiber). A spectral shift of the thin core fiber modal interferometer TCFMI (Thin-Core Fiber Modal Interferometer) was obtained at different angles of deflection in steps of 17.86 µrad.