Three companies stand out as early winners right now: Lumentum, Coherent, and Fabrinet. Each is using different strategies to ride current trends and tackle the EML shortage. 4M to boost its production capacity. The rapid development of AIGC has promoted the demand for 800G optical modules, and the entire industrial chain involving optical components, optical modules, and optical communication equipment is expected to fully benefit. Each EML integrates a wavelength-locked DFB laser with a monolithic electro-absorption. In 2025, the supply-demand gap for EML chips in 1. 6T optical modules will reach 40%. Also provides a detailed product description of the Optical Module, including product introduction, history, purpose, principle, characteristics, types. An EML electro-absorption modulated laser combines a distributed feedback EMLs excel in long-haul links without needing amplifiers. (DFB) laser. An EML (External Cavity Modulated Laser) Chip is a tiny device that combines laser diode technology with external cavity components to produce highly stable, tunable laser beams.