Photonic generation of terahertz dual-chirp waveforms ranging from 364 to 392 GHz | Zendy

Shiwei Wang | Zendy; Lu Zhang | Zendy; Zijie Lu | Zendy; Hongqi Zhang | Zendy; Mengyao Qiao | Zendy; Nazar Muhammad Idrees | Zendy; Muhammad Saqlain | Zendy; Shilie Zheng | Zendy; Xiaofeng Jin | Zendy; Xianmin Zhang | Zendy; Xianbin Yu | Zendy

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Photonic generation of terahertz dual-chirp waveforms ranging from 364 to 392 GHz

Author(s) -

Shiwei Wang,

Lu Zhang,

Zijie Lu,

Hongqi Zhang,

Mengyao Qiao,

Nazar Muhammad Idrees,

Muhammad Saqlain,

Shilie Zheng,

Xiaofeng Jin,

Xianmin Zhang,

Xianbin Yu

Publication year - 2021

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.422407

Subject(s) - chirp , terahertz radiation , optics , broadband , bandwidth (computing) , chirp spread spectrum , ranging , photonics , waveform , physics , radar , optoelectronics , telecommunications , computer science , laser , spread spectrum , direct sequence spread spectrum , channel (broadcasting)

In this paper, we propose and experimentally demonstrate a photonic scheme based on frequency doubling and photo-mixing to generate dual-chirp signals in the terahertz (THz) band. A broadband dual-chirp THz signal with 28 GHz bandwidth, ranging from 364 GHz to 392 GHz, is successfully generated in the proof-of-concept experiment, resulting in a chirp rate of 0.028 GHz/ns for both up chirp and down chirp signals. THz dual-chirp signals featuring a large bandwidth are beneficial to enable high resolution and high accuracy by mitigating the range measurement error induced by the range-Doppler coupling effect. Therefore, the proposed system is expected to have a great potential for future THz radar applications.

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