ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,503, issued on Jan. 13, was assigned to SAFRAN (Paris).
"Bragg wavelength spectral interrogation device" was invented by Nassim Salhi (Moissy-Cramayel, France) and Minh Chau Phan Huy (Moissy-Cramayel, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A spectral interrogation device, including: an optical source for emitting a light signal, a measurement optical fibre comprising a series of successive Bragg gratings for reflecting the light signal in different wavelength bands, a reflective optical fibre comprising a total reflection element, a wavelength detector, and an optical switch for switching between a sequence of three operating modes. I...