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Tunable microwave sawtooth waveform generation based on one single-drive Mach-Zehnder modulator
Author(s) -
Chao Wei,
Yang Jiang,
Hao Luo,
Ruyang Dong,
Jing Tian,
Yuejiao Zi,
Hongfang Liu,
Rong Wang
Publication year - 2020
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.387950
Subject(s) - sawtooth wave , electro optic modulator , optics , waveform , physics , superposition principle , polarization (electrochemistry) , modulation (music) , microwave , duty cycle , phase modulation , optical modulator , computer science , telecommunications , voltage , acoustics , phase noise , chemistry , quantum mechanics
A photonic method of sawtooth waveform generation by using one single-drive Mach-Zehnder modulator is proposed and experimentally demonstrated. Depending on the polarization-sensitive characteristic of the modulator, the modulation sidebands and optical carrier can independently exist on two orthogonal polarization directions. Therefore, the required Fourier components can be manipulated on two polarization dimensions separately, and the superposition of the orthogonal optical envelopes synthesize a sawtooth waveform in time domain. The feasibility of the scheme is theoretically analyzed. In the experiment, sawtooth waveforms with full duty cycle at 3, 5, and 8 GHz are obtained, which agree with the simulation results well.

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