The dispersion characteristics of superstructure fiber gratings written in multimode fibers and side-polished multimode fibers are investigated at different bending curvatures. The experimental results show that the group time delay in multimode superstructure fiber gratings can be tuned more easily than that of superstructure gratings in single-mode fiber. This method can provide tunable dispersion of superstructure fiber gratings by controlling the bending curvatures for application in dispersion compensators, fiber sensors, or suitable optical filters of optical communication systems.
© 2009 Optical Society of America
Photonic Crystals and Gratings
Original Manuscript: February 2, 2009
Revised Manuscript: March 21, 2009
Manuscript Accepted: March 22, 2009
Published: April 9, 2009
Ming-Yue Fu, Wen-Fung Liu, Hao-Jan Sheng, Lung Ai, Hsin-Wen Peng, and Chuen-Lin Tien, "Optical characteristics of bending multimode superstructure fiber gratings," Appl. Opt. 48, F1-F5 (2009)