Why AI Needs Lasers | Lumentum Explained

Follow me on LinkedIn:   / leo-cui-ph-d-cfa-59531439   I am a venture capital investor at FoundersX Ventures, an AI and deep-tech VC fund based in Menlo Park, Cambridge and NYC. I previously did my Ph.D. at Harvard, postdoc at MIT. Every ChatGPT response, every AI image, and every large language model depends on one thing: thousands of GPUs communicating with each other at incredible speeds. But GPUs alone aren't enough. They need light. In this video, I explain Lumentum from first principles—what the company actually does, why optical networking has become one of the biggest bottlenecks in AI, and why NVIDIA recently committed billions of dollars to secure laser supply. We'll cover: • Why AI clusters need optical networking • Why copper is reaching its limits • How fiber optics and lasers move AI data • What an EML laser actually is • Why indium phosphide matters • Lumentum's business model and competitive advantages • Financial performance and growth outlook • The bull case vs. the bear case • The key metrics investors should watch going forward Whether you're an investor, engineer, student, or simply curious about how AI infrastructure works, this video explains one of the most important—but least understood—companies enabling the AI revolution. If you enjoyed this deep dive, please like the video and subscribe. I publish in-depth explainers on AI infrastructure, semiconductors, data centers, energy, space technology, and other frontier technologies to help you understand the companies shaping the future. ⚠️ Disclaimer: This video is for educational purposes only and should not be considered financial advice. I may own positions in companies discussed. Always do your own research before making any investment decisions. #Lumentum #LITE #AI #ArtificialIntelligence #NVIDIA #OpticalNetworking #FiberOptics #DataCenter #AIInfrastructure #Semiconductors #Investing #Technology #DeepDive