First InP-based CDM operating in C+L bands has record transmission capacity per wavelength

https://phys.org/news/2024-02-inp-based-modulator-high-bit.html

"compact 11.9 × 29.8 × 4.35 mm3 indium phosphide (InP)-based coherent driver modulator (CDM)... single module optical transmitter covers C+L band... optimized semiconductor layer and waveguide.. wide wavelength range: electro-optic 3-dB bandwidth >90 GHz, insertion loss at maximum transmission <8 dB, and extinction ratio >= 28 dB... using 180 Gbaud probabilistically constellation-shaped PCS-144QAM signals: net bit rate  1.8 Tbps over 80-km standard single mode fiber in the C+L band"