Long tapered fiber with array of FBG

• Published in: Optical fiber technology Vol. 50; pp. 95 - 98
• Main Authors: Chamorovskiy, Yu.K., Butov, O.V., Kolosovskiy, A.O., Popov, S.M., Voloshin, V.V., Vorob'ev, I.L., Vyatkin, M.Yu, Odnobludov, M.A.
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.07.2019
• Subjects: Fiber Bragg gratings; Fiber optics sensors; Tapered optical fibers; Tapered optical fibers; Fiber optics sensors; Fiber Bragg gratings
• ISSN: 1068-5200; 1095-9912
• DOI: 10.1016/j.yofte.2019.03.006

•Tapered optical fiber with inscribed array of fiber Bragg gratings during optical fiber drawing process was developed and investigated.•The spectral width of the reflected signal value is 4 nm.•The level of the reflected signal is up to 5% at specific wavelengths. We demonstrate that propagating optical signal remains single-mode along the fiber Bragg gratings array taper even in a multimode part of it. A tapered optical fiber with an adiabatic transition from single-mode to a few-mode part has been fabricated with an array of fiber Bragg gratings being inscribed during the drawing process. We demonstrate that the propagating optical signal remains single-mode along the tapered fiber FBG array even in a multimode part of it. The spectral width of the reflected signal from the tapered optical fiber is 4 nm. The level of the reflected signal is up to 5% at some wavelengths.