Our comb paper is published in Scientific Reports

We are happy to share that our paper “O-band DWDM data transmission with quantum dot mode-locked comb laser and semiconductor optical amplifier” has been published in the Scientific Reports, part of the Nature Portfolio.

It is based on recent developments at Innolume, including a quantum dot (QD)-based broadband 100 GHz mode-locked comb laser and QD-based low noise WDM semiconductor optical amplifier (SOA). This study addresses a long-standing challenge of increasing data transmission rates in the O-band while meeting the power requirements needed to overcome losses in a PIC.
We use a single comb laser chip emitting multiple low-noise spectral modes and simultaneously re-amplify 23 comb lines, depleted after the PIC, using a low-noise SOA. In this way, we demonstrate O-band DWDM data transmission of a PAM4 signal with a total bit rate of up to 2.3 Tb/s in fiber using a single QD comb laser source.

This study also reports ongoing advances at Innolume in the development of single-cavity comb lasers with increased interline separation, which is important for compatibility with state-of-the-art DWDM PIC technologies. We present comb laser devices with and without a saturable absorber section, providing up to 10 lines with 138 GHz spacing, 4 lines with 163 GHz spacing, and 3 lines with 216 GHz spacing, suitable for data transmission.