Open AccessTheoretical investigation of photonic generation of frequency quadrupling linearly chirped waveform with large tunable range
Author(s) -
Yulei Liu,
Jun Liang,
Xuan Li,
Nan Xiao,
Zhenghao Zhang,
Xiao-bing Yuan
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.016196
Subject(s) - optics , bandwidth (computing) , pulse compression , phase modulation , physics , frequency modulation , photonics , free spectral range , materials science , phase noise , wavelength , telecommunications , computer science , radar
To generate linearly chirped microwave signals with a large frequency tunable range, a photonic approach is proposed. Firstly, A dual-output dual-parallel Mach-Zehnder modulator (DPMZM) followed by the polarization beam combiner and an optical filter is utilized to generate orthogonally polarized ± second-order optical sidebands. Then a polarization modulator is employed to achieve the phase modulation of the two wavelengths. Finally, the balanced detection is applied to suppress the distortion and background noise. The key advantages of the proposed scheme are the central frequency multiplying operation and large frequency tunable range. Simulation results show that a linearly chirped pulse product with time-bandwidth as well as a compression ratio for the pulse of 11 and 9.3 respectively, and a peak-to-sidelobe ratio (PSR) of 7.4 dB is generated. The system has both good reconfigurability and tunability, its frequency can be continuously adjusted from about 10 GHz to as much as 50 GHz in principle.