The hardware bottleneck in AI has officially migrated from compute to connectivity. As highlighted in image_11.png, Lumentum surged 13.72% amidst an explosive wave of demand for high-speed optical interconnects in AI data centers. This triggered a roaring rally across the entire optical components sector, pushing Coherent (COHR) to a brand-new all-time high.
With next-generation rack-scale compute deployments like Nvidia's GB200 and Vera Rubin accelerating, optical modules are aggressively being repriced. They are no longer viewed as commodity networking parts, but as the premier AI infrastructure "picks-and-shovels" play, following in the footsteps of the historic compute and memory trades.
The Shift from Pluggables to CPO (The [IDEA] Angle):
The prompt in image_11.png poses the vital question: Do you see AI optical interconnects as a structural opportunity — or just the latest round of hype?
My core thesis is that this is a deeply structural, multi-year paradigm shift, not transient hype. When data center racks scale from 120 kW to a staggering 600 kW, traditional copper wiring hits a physical wall due to extreme power attenuation and heat. To feed data to massive clusters of GPUs without bottlenecking, data centers must shift to optics.
Furthermore, we are witnessing an architectural evolution from traditional pluggable transceivers toward Co-Packaged Optics (CPO), which integrates the optical engines directly into the chip package. CPO minimizes electrical losses, cuts power consumption per bit, and unlocks maximum bandwidth density. The big tech consensus is already solidified: an industry alliance including Nvidia, AMD, Broadcom, and Meta was formed specifically to establish optics as the preferred scale-up interconnect. Big tech is voting with its wallet, including massive multi-billion-dollar investments pouring into leaders like Lumentum and Coherent to secure this vital silicon photonics supply chain.
However, the cautionary note in image_11.png is entirely valid: optical stocks are historically high-volatility cyclicals prone to severe drawdowns when valuations overshoot. Lumentum's massive run has pushed its trailing P/E ratio into highly elevated territory.
My Action Plan:
I am heavily leaning into the structural CPO thesis for the long term, but I am respecting the short-term cyclicality. As shown in the related stocks section of image_11.png, Lumentum (-1.76%), Coherent (-1.84%), and Applied Optoelectronics (-2.34%) are all undergoing mild 24-hour pullbacks as the market digests the recent massive surge. I am using this slight breathing room to scale into Lumentum (LITE) and Coherent (COHR) via dollar-cost averaging, building a core structural position while keeping a cash buffer to buy aggressively if a sharper cyclical flush occurs.
Over to the Community:
• Do you view Co-Packaged Optics (CPO) as the next legendary multi-bagger AI trade like HBM memory, or are you worried about the historical cyclicality of optical stocks?
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