Hybrid-integrated multi-port multi-wavelength DFB laser array for optical I/O technology

This is the authors' abstract. We don't add key points for this paper.

The parallel multi-wavelength light source plays a critical role in optical input/output (I/O) systems by providing multiple wavelengths to enhance data transmission capacity and flexibility.This study proposes and experimentally demonstrates, to our knowledge, a novel on-chip parallel multi-wavelength light source based on an eight-wavelength distributed feedback (DFB) laser array, an arrayed waveguide grating (AWG), and a Y-branch light power splitter for optical I/O applications.The π-phase-shifted laser array is designed using the reconstructed equivalent chirp (REC) method for precise wavelength control.The AWG is designed for eight-wavelength multiplexing, while the Y-branches function as output interfaces, supporting 64 channels across eight ports simultaneously.An output power exceeding 6.9 dBm is achieved at each of the eight output ports.Furthermore, the linewidth of the representative wavelength is measured to be 361.5 kHz, and clear 25 Gb/s non-return-to-zero (NRZ) eye diagrams are obtained.The proposed parallel multi-wavelength source scheme offers a compact and promising solution for advancing optical I/O technology.