A novel formation method of a long-period fiber grating (LPFG) based on a magnetic-force-induced microbend is proposed and experimentally demonstrated. The LPFG employs a permanent magnet that exerts transversal force to the fiber by attracting a steel coil spring. The transversal force causes periodic microbending to the fiber, and therefore the transmission wave attenuates at the core-to-cladding mode resonance. This device has advantages of ease of fabrication, reconfigurability, and available for any type of fiber.
© 2012 Optical Society of America
Diffraction and Gratings
Original Manuscript: January 25, 2012
Manuscript Accepted: February 14, 2012
Published: March 28, 2012
Hajime Sakata and Kosuke Yamahata, "Magnetic-force-induced long-period fiber gratings," Opt. Lett. 37, 1250-1252 (2012)