Switchable down-, up- and dual-chirped microwave waveform generation with improved time-bandwidth product based on polarization modulation and phase encoding

doi:10.1088/1674-1056/ac5982

Abstract A switchable down-, up- and dual-chirped microwave waveform generation technique with improved time-bandwidth product (TBWP) is proposed and demonstrated based on a dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM) cascaded with a polarization modulator (PolM). By properly controlling the phase shifts of the radio frequency signals applied to the DP-DPMZM, switchable down-, up- and dual-chirped waveforms with simultaneous frequency and bandwidth doubling can be generated. To enlarge the TBWP further, splitting parabolic signal and phase-encoding splitting parabolic signal are used to drive the PolM for the enhancement of bandwidth and time duration. Numerical results demonstrate the generation of down-, up- and dual-chirped microwave waveform with TBWP of 8, 160 and 10240. The proposed method may find applications in future multifunction radar systems due to the high performance and flexibility.

Keywords: microwave photonics linearly chirped waveform generation time-bandwidth product

Received: 20 October 2021
Revised: 01 January 2022
Accepted manuscript online: 02 March 2022

PACS:	84.40.-x	(Radiowave and microwave (including millimeter wave) technology)
	07.57.-c	(Infrared, submillimeter wave, microwave and radiowave instruments and equipment)
	42.79.-e	(Optical elements, devices, and systems)
	42.79.Sz	(Optical communication systems, multiplexers, and demultiplexers?)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. U2006217, 61775015, and 62101027) and the Fundamental Research Funds for the Central Universities (Grant Nos. 2021JBZ103 and 2021YJS002).

Corresponding Authors: Muguang Wang
E-mail: mgwang@bjtu.edu.cn

Cite this article:

Yuxiao Guo(郭玉箫), Muguang Wang(王目光), Hongqian Mu(牟宏谦), and Guofang Fan(范国芳) Switchable down-, up- and dual-chirped microwave waveform generation with improved time-bandwidth product based on polarization modulation and phase encoding 2022 Chin. Phys. B 31 078403

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Switchable down-, up- and dual-chirped microwave waveform generation with improved time-bandwidth product based on polarization modulation and phase encoding

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