We propose a simple analysis of a single-multimode-single-mode fiber (SMSMF) filter by observing the excited modes in multimode fiber (MMF). The method is used to design a SMSMF filter demodu lator for fiber Bragg grating sensors, and a corresponding demodulation system is created. The static and dynamic measurements based on the system are given to prove the feasibility of the intensity demodulator.
© 2009 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: April 28, 2009
Revised Manuscript: July 28, 2009
Manuscript Accepted: September 18, 2009
Published: October 12, 2009
Jianzhong Zhang, Weimin Sun, Libo Yuan, and Gang-Ding Peng, "Design of a single-multimode-single-mode filter demodulator for fiber Bragg grating sensors assisted by mode observation," Appl. Opt. 48, 5642-5646 (2009)