Yifan Chen, Jianjun Yu, Jianyu Long, Ying Nian Wu, Ying Wang, LUHAN JIANG, Zhihang Ou, yubing zhang, Kaile Li, Xiongwei Yang, yi wei, Weiping Li, Kaihui Wang, Wen Zhou, Feng zhao
To effectively utilize existing fiber infrastructure in wireless-fiber transmission scenarios, especially for potential use in satellite-ground-user links, we propose a novel, to the best of our knowledge, D-band THz-to-photonics converter based on two electronic IQ mixers and a polarization-multiplexed intensity modulator (PM-IM), which enables polarization-insensitive transmissions and results in enhanced performance. With the help of the proposed converter, we successfully demonstrate the experimental transmission of 16-/24-Gbaud quadrature phase shift keying (QPSK) signals over a 2.92-m wireless and 5-km standard single-mode fiber (SSMF) link. Experimental results indicate that the power penalty is measured as 1.1 and 2.9 dB for the two baud rates, respectively, under the 20% soft-decision forward-error-correction (SD-FEC) threshold of 2 × 10 −2 .