Improving suppression ratio of microwave photonic filters using high-precision spectral shaping

Yang Yu; Shangyuan Li; Jinxin Liao; Xiaoping Zheng; Hanyi Zhang; Bingkun Zhou

doi:10.1117/1.OE.54.5.050501

4 May 2015 Improving suppression ratio of microwave photonic filters using high-precision spectral shaping

Yang Yu, Shangyuan Li, Jinxin Liao, Xiaoping Zheng, Hanyi Zhang, Bingkun Zhou

Author Affiliations +

Optical Engineering, Vol. 54, Issue 5, 050501 (May 2015). https://doi.org/10.1117/1.OE.54.5.050501

Abstract

The main-to-sidelobe suppression ratio (MSSR) is significant to filters. The tap weight errors worsen the MSSR of the finite impulse response (FIR) microwave photonic filters (MPFs). The MSSR can be improved by shaping the multicarrier optical source spectra with high precision. By compensating the errors with an iteration method, the sidelobes of the amplitude response can be optimized to increase the MSSR. Such a method is simple, effective, and compatible with all FIR MPF approaches. In the experiment, optical spectra of Gaussian profiles were taken as an example, and an MSSR improvement from 50 to 63 dB was demonstrated.

Citation Download Citation

Yang Yu, Shangyuan Li, Jinxin Liao, Xiaoping Zheng, Hanyi Zhang, and Bingkun Zhou "Improving suppression ratio of microwave photonic filters using high-precision spectral shaping," Optical Engineering 54(5), 050501 (4 May 2015). https://doi.org/10.1117/1.OE.54.5.050501

Published: 4 May 2015

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