AXT (AXTI): The Indium Phosphide Bottleneck Behind AI Optics

Trading floor screens showing a semiconductor substrate stock surging on AI optical demand

AXT (AXTI): The Indium Phosphide Bottleneck Behind AI Optics

AXT (AXTI): The Indium Phosphide Bottleneck Behind AI Optics Every few quarters the AI buildout finds a new component it cannot get enough of. In 2024 it was high bandwidth memory. In 2025 it was advanced packaging. In 2026 the constraint moved somewhere far less visible: the crystal wafer that high speed laser chips are…

Leave a comment AI Data Center, AXT, AXTI, Coherent, Indium Phosphide, Lumentum, Optical Networking, Semiconductor Substrates, Silicon Photonics

Cinematic trading floor screens showing Tower Semiconductor TSEM stock alongside optical data streams

Tower Semiconductor (TSEM): Inside the Silicon Photonics Bet

Jeffrey Bong AI Chips, Photonics

Tower Semiconductor (TSEM): Inside the Silicon Photonics Bet 1. Introduction For most of its history, Tower Semiconductor was a company investors filed under “specialty analog foundry” and then stopped thinking about. It made image sensors, power management chips, and radio frequency components in older fabs nobody would confuse with a leading-edge logic megafab. In 2022…