Integrated dual-laser photonic chip for high-purity carrier generation enabling ultrafast terahertz wireless communications

Shi Jia (), Mu-Chieh Lo, Lu Zhang, Oskars Ozolins, Aleksejs Udalcovs, Deming Kong, Xiaodan Pang (), Robinson Guzman, Xianbin Yu, Shilin Xiao, Sergei Popov, Jiajia Chen, Guillermo Carpintero (), Toshio Morioka, Hao Hu () and Leif K. Oxenløwe
Additional contact information
Shi Jia: Technical University of Denmark, DK-2800, Kgs
Mu-Chieh Lo: Universidad Carlos III de Madrid
Lu Zhang: KTH Royal Institute of Technology
Oskars Ozolins: KTH Royal Institute of Technology
Aleksejs Udalcovs: RISE Research Institutes of Sweden
Deming Kong: Technical University of Denmark, DK-2800, Kgs
Xiaodan Pang: KTH Royal Institute of Technology
Robinson Guzman: Universidad Carlos III de Madrid
Xianbin Yu: Zhejiang University
Shilin Xiao: Shanghai Jiao Tong University
Sergei Popov: KTH Royal Institute of Technology
Jiajia Chen: KTH Royal Institute of Technology
Guillermo Carpintero: Universidad Carlos III de Madrid
Toshio Morioka: Technical University of Denmark, DK-2800, Kgs
Hao Hu: Technical University of Denmark, DK-2800, Kgs
Leif K. Oxenløwe: Technical University of Denmark, DK-2800, Kgs

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Photonic generation of Terahertz (THz) carriers displays high potential for THz communications with a large tunable range and high modulation bandwidth. While many photonics-based THz generations have recently been demonstrated with discrete bulky components, their practical applications are significantly hindered by the large footprint and high energy consumption. Herein, we present an injection-locked heterodyne source based on generic foundry-fabricated photonic integrated circuits (PIC) attached to a uni-traveling carrier photodiode generating high-purity THz carriers. The generated THz carrier is tunable within the range of 0–1.4 THz, determined by the wavelength spacing between the two monolithically integrated distributed feedback (DFB) lasers. This scheme generates and transmits a 131 Gbits−1 net rate signal over a 10.7-m distance with −24 dBm emitted power at 0.4 THz. This monolithic dual-DFB PIC-based THz generation approach is a significant step towards fully integrated, cost-effective, and energy-efficient THz transmitters.

Date: 2022
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DOI: 10.1038/s41467-022-29049-2

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