Reconfigurable Phase-Shifted Fiber Bragg Grating Using Localized Micro-Strain

• Published in: IEEE photonics technology letters Vol. 28; no. 9; pp. 951 - 954
• Main Authors: Falah, A. A. S., Mokhtar, M. R., Yusoff, Z., Ibsen, M.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-05-2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Bragg gratings; continuous phase modulation; Fasteners; Fiber gratings; micro-strain; optical fiber communications; Optical fibers; optical filters; Strain; Tuning; Bragg gratings; optical filters; optical fiber communications; continuous phase modulation; micro-strain
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2016.2519249

A simple and precise method for tuning of localized phase shift in fiber Bragg grating (FBG) using mechanical micro-strain is proposed and experimentally verified. Positive and negative continuous phase shifts tuning between 0 and +π/-π in a uniform FBG is experimentally demonstrated using confined micro-strain in a beam bending configuration. The magnitudes of the temporary phase shifts can be linearly controlled by changing the load displacement, with set-and-forget capability.