Global Photonics Technology Developments and News (June–July 2025)
A global research team led by Japan’s NICT demonstrated 1.02 Pb/s transmission over 1,808 km using a 19-core fiber and custom optical amplifiers. NICT, ASTRODESIGN, and Fujikura deployed a multi-core fiber system with eight 4-core fibers (32 cores total) enabling uncompressed 8K video across a 300 m link at about 70 Gbps per stream. In early June, NICT and Sony announced the first practical 1,550 nm VCSEL using quantum dots as the gain medium, promising cheaper, lower-energy lasers for fiber-optic links. MIT unveiled an optical AI accelerator chip for wireless networks, a photonic processor using an optical neural network that