Alphabet's X division has developed a silicon photonic chip for its Taara project, which transmits internet via laser beams instead of fiber optic cables. The system delivers 20Gbps through "light bridges" that establish line-of-sight connections between transceiver units. The second-generation technology [1]miniaturizes previous mechanical components -- including gimbals, mirrors, and lenses -- into solid-state circuitry the size of a fingernail.

This chip enables a single laser transmitter to potentially pair with multiple receptors, significantly reducing costs from the current ~$30,000 per bridge setup. Taara has already demonstrated real-world viability by connecting Brazzaville and Kinshasa across the Congo River, providing the latter with five-fold cheaper internet access, and supplementing bandwidth at Coachella 2024. Project leader Mahesh Krishnaswamy claims Taara can deliver "10, if not 100 times more bandwidth" than Starlink in dense areas. X's Astro Teller suggests this technology could form the foundation for 7G networks as radio frequency bands become increasingly congested. Taara will soon "graduate" from X and seek external funding, with Alphabet maintaining a significant stake.

Further reading : [2]Official blog post .



[1] https://www.wired.com/story/plaintext-google-taara-chip-internet-by-light/

[2] https://x.company/blog/posts/taara-chip/