Open AccessMulti-wavelength 128 Gbit s−1 λ −1 PAM4 optical transmission enabled by a 100 GHz quantum dot mode-locked optical frequency comb
Author(s) -
Shujie Pan,
Honggang Zhang,
Zizhuo Liu,
Mengya Liao,
Mingchu Tang,
Dingyi Wu,
Xiao Hu,
Jie Yan,
Lei Wang,
Ming-Chen Guo,
Zihao Wang,
Ting Wang,
Peter M. Smowton,
A.J. Seeds,
Huiyun Liu,
Xi Xiao,
Siming Chen
Publication year - 2022
Publication title -
journal of physics. d, applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.857
H-Index - 198
eISSN - 1361-6463
pISSN - 0022-3727
DOI - 10.1088/1361-6463/ac4365
Subject(s) - optics , photonics , optoelectronics , modulation (music) , transmission (telecommunications) , physics , wavelength , laser , quantum dot , materials science , telecommunications , computer science , acoustics
Semiconductor mode-locked lasers (MLLs) with extremely high repetition rates are promising optical frequency comb (OFC) sources for their usage as compact, high-efficiency, and low-cost light sources in high-speed dense wavelength-division multiplexing transmissions. The fully exploited conventional C- and L- bands require the research on O-band to fulfil the transmission capacity of the current photonic networks. In this work, we present a passive two-section InAs/InGaAs quantum-dot (QD) MLL-based OFC with a fundamental repetition rate of ∼100 GHz operating at O-band wavelength range. The specially designed device favours the generation of nearly Fourier-transform-limited pulses in the entire test range by only pumping the gain section while with the absorber unbiased. The typical integrated relative intensity noise of the whole spectrum and a single tone are −152 and −137 dB Hz −1 in the range of 100 MHz–10 GHz, respectively. Back-to-back data transmissions for seven selected tones have been realised by employing a 64 Gbaud four-level pulse amplitude modulation format. The demonstrated performance shows the feasibility of the InAs QD MLLs as a simple structure, easy operation, and low power consumption OFC sources for high-speed fibre-optic communications.