Abstract
The use of coherent transceivers with higher-order quadrature-amplitude modulation (QAM) is expected to solve the capacity limit imposed in current short-haul transmission systems based on non-coherent transceivers. However, coherent transceivers are more costly than non-coherent transceivers. Indeed, most existing short-haul communication systems adopt non-coherent transceivers. To lower the cost of coherent transceivers, it is desirable to use low-cost lasers and eliminate costly booster erbium-doped fibre amplifiers (EDFAs). However, the use of low-cost lasers induces severe phase noise while the elimination of EDFAs causes SNR degradation due to modulation loss; these problems hinder the effective use of higher-order QAM signals.
© 2023 IEEE
PDF ArticleMore Like This
Jun Sakano, Yojiro Mori, and Hiroshi Hasegawa
Tu5A.6 Photonics in Switching and Computing (PS) 2021
Xun Guan, Amir Omidi, Ming Zeng, and Leslie Ann Rusch
SW4E.2 CLEO: Science and Innovations (CLEO:S&I) 2022
Allaparthi Venkata Satya Vithin and Rajshekhar Gannavarpu
JTh6A.32 Applied Industrial Spectroscopy (AIS) 2021