Title :
Analysis and Compensation of Third-Order Dispersion Induced RF Distortions in Highly Reconfigurable Microwave Photonic Filters
Author :
Xiaoxiao Xue ; Xiaoping Zheng ; Hanyi Zhang ; Bingkun Zhou
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A scheme to perform high-quality-factor (Q) reconfigurable microwave photonic filtering with the optical third-order dispersion (TOD) induced radiofrequency (RF) distortions compensated is demonstrated. A detailed investigation of the TOD induced RF distortions is presented both theoretically and experimentally. By programming the optical spectrum in one arm of the Mach-Zehnder structure, the distortions can be completely eliminated, giving rise to ideal RF transfer function which can achieve very high Q factors. The experimentally demonstrated Q factors are 634 and 76 when the RF center is tuned to 18 GHz and the passband shape is configured to be sinc-shape and flat-top respectively, the highest values ever reported for a single-bandpass, complex-tap, and reconfigurable microwave photonic filter.
Keywords :
microwave filters; microwave photonics; optical fibre dispersion; optical filters; Mach-Zehnder structure; RF distortion; high quality factor microwave photonic filtering; highly reconfigurable microwave photonic filter; optical spectrum; optical third order dispersion; Bandwidth; Dispersion; Microwave filters; Optical distortion; Optical interferometry; Radio frequency; Transfer functions; Mach-Zehnder interferometer; microwave photonic filter; quality factor; third-order dispersion;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2013.2265231
