Birefringent π-Phase-Shifted Fiber Bragg Gratings for Sensing at 1000 °C Fabricated Using an Infrared Femtosecond Laser and a Phase Mask

• Published in: Journal of lightwave technology Vol. 36; no. 23; pp. 5697 - 5703
• Main Authors: Hnatovsky, Cyril, Grobnic, Dan, Mihailov, Stephen J.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.12.2018; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Birefringence; Bragg gratings; femtosecond laser; Femtosecond pulses; fiber Bragg gratings; Fiber gratings; Fiber lasers; Gratings (spectra); Infrared lasers; laser material processing; Lasers; Nanostructure; Optical fiber polarization; Optical fiber sensors; Optical fibers; phase mask; phase shift; Polarization; Silicon dioxide; Temperature sensors

Birefringent π-phase-shifted Bragg gratings for multi-parameter sensing at temperatures ~1000 °C are written inside a standard single mode silica optical fiber (SMF-28) with infrared femtosecond pulses and a special phase mask one half of which is shifted with respect to the other by 5/4 of the mask...