Researchers demonstrate an 8×240 Gbps DWDM transmitter on a thin-film lithium tantalate platform for the O-band, using a novel flat-top optical filter based on coupled Fabry–Perot cavities. It achieves low insertion loss (0.1–0.4 dB), a high extinction ratio (~26 dB), and a 12 nm free spectral range, showing promise for high-capacity optical links in AI and data centers.
- Mingyu Zhu
- Dajian Liu
- Daoxin Dai
