Photonic Scheme for the Generation of Background-Free Phase-Coded Microwave Pulses and Dual-Chirp Microwave Waveforms

Photonic Scheme for the Generation of Background-Free Phase-Coded Microwave Pulses and Dual-Chirp Microwave Waveforms

We propose a photonic scheme to generate binary phase-coded microwave pulses and dual-chirp microwave waveforms without baseband-modulated signals (background noise) based on a dual-polarization dual-drive Mach-Zehnder modulator (DP-DDMZM) which contains <italic>x</italic>-DDMZM and <...

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Bibliographic Details
Main Authors: Guangyi Li, Difei Shi, Zhiyao Jia, Lu Wang, Ming Li, Ning Hua Zhu, Wei Li
Format: Article
Language:English
Published: IEEE 2021-01-01
Series:IEEE Photonics Journal
Subjects:
Microwave photonics
microwave generation
phase-coded signal
dual-chirp
Online Access:https://ieeexplore.ieee.org/document/9395208/
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Summary:We propose a photonic scheme to generate binary phase-coded microwave pulses and dual-chirp microwave waveforms without baseband-modulated signals (background noise) based on a dual-polarization dual-drive Mach-Zehnder modulator (DP-DDMZM) which contains <italic>x</italic>-DDMZM and <italic>y</italic>-DDMZM at two different polarization states. A radio frequency (RF) signal from a microwave source is transferred into two differential RF signals and employed into one arm of <italic>x</italic>-DDMZM and one arm of <italic>y</italic>-DDMZM, while a baseband signal from an arbitrary waveform generator is divided by an electronic coupler and then driven into the two other arms of DP-DDMZM. By adjusting the phase differences between the <italic>x</italic>-DDMZM and the <italic>y</italic>-DDMZM, binary phase-coded pulses and dual-chirp signals without baseband-modulated signals are generated. The proposed scheme can eliminate the interference caused by baseband-modulated signals, and satisfy different radar applications for different frequency bands. Experimental results show that phase-coded signals at 15 GHz with the bit rates of 1 Gb&#x002F;s and 2 Gb&#x002F;s and dual-chirp signals at 10 GHz and 15 GHz with the time durations of 0.5 &#x03BC;s are successfully generated. The reported scheme is well analyzed in theory and verified by experiment.
ISSN:1943-0655

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