A superchirped moiré grating has multiple superimposed chirped Bragg gratings. We show that a superchirped moiré grating can be formed in an acousto-optic superlattice with a chirped fiber Bragg grating. There are multiple transmission peaks related to Fabry–Perot resonance in the transmission spectrum. The peak spacing is varied by the acoustic frequency. The proposed devices can be used as tunable multiple-passband transmission filters and switches.
© 1999 Optical Society of America
(050.1590) Diffraction and gratings : Chirping
(050.2770) Diffraction and gratings : Gratings
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.2310) Fiber optics and optical communications : Fiber optics
Xiang-fei Chen, Zheng-bai Ma, Wei-hon Li, Xiao-ning Yin, and Zhi-jian Wu, "Superchirped moiré grating based on an acousto-optic superlattice with a chirped fiber Bragg grating," Opt. Lett. 24, 1558-1560 (1999)