Coupling between copropagating core and cladding modes was implemented by acoustic generation of lateral vibration of an etched fiber. When these coupling processes were combined with counterpropagating coupling of a core mode and a cladding mode and the Bragg reflection of a fiber grating, switching of reflection wavelength between the Bragg wavelength and cladding-mode coupling wavelengths was achieved. We report the implementation of such acoustically induced switching behaviors and explain their operation principles. The implemented results can be used for wavelength-division multiplexed add–drop filtering.
© 2000 Optical Society of America
Wen-Fung Liu, I-Ming Liu, Lung-Wei Chung, Ding-Wei Huang, and C. C. Yang, "Acoustic-induced switching of the reflection wavelength in a fiber Bragg grating," Opt. Lett. 25, 1319-1321 (2000)