Abstract

Terahertz band has become a promising research field due to its advantages such as high frequency and large available bandwidth. In this paper, we realized the transmission of the 325 GHz 30 Gbaud terahertz quadrature phase shift keying (QPSK) signal with a bit error ratio (BER) less than the 7% hard-decision forward-error-correction (HD-FEC) threshold of 3.8 × 10⁻³, and 325 GHz 16 Gbaud 16-ary quadrature amplitude modulation (16QAM) signal with a BER less than the 20% soft-decision forward-error-correction (SD-FEC) threshold of 2.0 × 10⁻² over 1 m metallic hollow core fiber. In addition, the performances of the metallic hollow core fiber transmission system under different frequencies from 300 to 380 GHz have also been measured. With the help of the Volterra nonlinearity compensation (VNC) algorithm, the highest net transmission rate can be up to 140.625 Gbit/s for 300 GHz 30 Gbaud 64QAM signal with satisfying the 28% spatially coupled low density parity check (SC-LDPC) threshold of 5.2 × 10⁻². By comparing the performances of the metallic hollow core fiber transmission system and wireless transmission system, we also proved the superiority of the hollow core fiber to transmit terahertz signals. The experimental results show that compared with the commonly used free space transmission, the hollow core fiber can be a promising candidate to transmit high-frequency terahertz signals with a high speed and a low loss, and is worthy of further study in the future.

Beyond 300-Gbps/λ photonics-aided THz-over-fiber transmission employing MIMO single-carrier frequency-domain equalizer

Chen Wang, Jianjun Yu, Jiao Zhang, Min Zhu, Yuxuan Tan, Kaihui Wang, Junjie Ding, Wen Zhou, Tangyao Xie, Jianguo Yu, and Feng Zhao
Opt. Lett. 48(6) 1363-1366 (2023)

65,536-QAM OFDM signal transmission over a fiber-THz system at 320 GHz with delta-sigma modulation

Junting Shi, Jianjun Yu, Jiao Zhang, Min Zhu, Long Zhang, Kaihui Wang, Wen Zhou, Tangyao Xie, and Jianguo Yu
Opt. Lett. 48(8) 2098-2101 (2023)

Transmission of sub-terahertz signals over a fiber-FSO-5 G NR hybrid system with an aggregate net bit rate of 227.912 Gb/s

Hai-Han Lu, Wen-Shing Tsai, Xu-Hong Huang, Jia-Lian Jin, Yan-Zhen Xu, Wei-Xiang Chen, Chih-Hong Lin, and Tsai-Man Wu
Opt. Express 31(20) 33320-33332 (2023)

Photonics-aided 2 × 2 MIMO wireless terahertz-wave signal transmission system with optical polarization multiplexing

Xinying Li, Jianjun Yu, Kaihui Wang, Wen Zhou, and Jiao Zhang
Opt. Express 25(26) 33236-33242 (2017)

Transmission of 4096-QAM OFDM at D-band

Li zhao, Kaihui Wang, and Wen Zhou
Opt. Express 31(2) 2270-2281 (2023)