Coherence-free microwave photonic notch filter with a single driver intensity modulator in a Sagnac fiber loop.
A coherence-free microwave photonic filter configuration is presented. The configuration is based on a Sagnac loop interferometer containing a single-drive intensity modulator without a nonreciprocal bias unit. A notch response is obtained by modulating the clockwise and counterclockwise propagating waves inside the Sagnac loop at different times. A general theoretical analysis for both the reflected signal and the transmitted signal is obtained. Measured results verify the theoretical expressions and demonstrate a robust notch filter response.
Ning
Guoxiang
G
Network Technology Research Centre, Nanyang Technological University, Research TechnoPlaza XFrontier Block, 4th Storey 50 Nanyang Drive, Singapore 637553. ngxstone@pmail.ntu.edu.sg
Shum
Ping
P