All-fiber multimode interference bandpass filter.
A novel design for an all-fiber bandpass filter based on a multimode interference reimaging phenomenon is presented. The filter has achieved low insertion loss with adequate bandwidth and isolation for coarse wavelength-division multiplexing. The filter can easily be made with any central wavelength that is compatible with the single-mode fiber used for its construction. The measured filter performance matches the theoretical predictions well. The filter can have broad applications in fiber-optic telecommunications, spectroscopy, and sensing.
Mohammed
Waleed S
WS
Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
Smith
Peter W E
PW
Gu
Xijia
X