A new light-switching chip just hit speeds of 50 GHz, potentially making our internet backbones much faster.
April 15, 2026
Original Paper
High bandwidth traveling wave electro-optic modulator at 1μm on thin-film lithium tantalate
arXiv · 2604.09825
The Takeaway
The speed of the internet is limited by how fast we can turn light signals on and off. This paper describes the first-ever demonstration of an electro-optic modulator made from thin-film lithium tantalate that works at a specific wavelength (1 micron) at an incredible 50 billion cycles per second. Previously, this material was thought to be too difficult to work with for these high speeds. This breakthrough means we can pack way more data into fiber optic cables than we currently do. For you, it’s a step toward 'instant' downloads and glitch-free 8K streaming, as the 'switch' that moves your data through the web just got a major speed upgrade.
From the abstract
We present the first experimental demonstration of a high-bandwidth thin-film lithium tantalate (TFLT) electro-optic modulator operating at 1 {\mu}m, with a V{\pi} of 2.4 V, and less than 2 dB electro-optic roll-off up to 50 GHz and stable DC bias operation.