Networking is the next AI hardware trade after memory, whose share of rack value rose from 15% to 35%. Optics is moving inside the server, as Nvidia's Feynman architecture builds in co-packaged optics and silicon photonics. Scale-across networking could grow 30% a year just linking existing data centers, as inference moves closer to users and training spreads across sites. Supply is tight: Lumentum's CEO said it can meet only 30% of expected 2027 demand and sees optics tighter than memory. x.com 

Scale-up moving to optics adds demand for optical suppliers even if new AI architectures need fewer switches. Bigger data centers and more GPUs add to that need; Jensen Huang expects future optics requirements to be several orders of magnitude above what NVIDIA ships today. This challenges the optics bear case for Lumentum, Coherent, Tower Semiconductor and Credo. x.com 

Photonics and co-packaged optics stocks such as Lumentum have more room to correct, because a single SemiAnalysis report was enough to spook the market. SemiAnalysis claims Nvidia's Kyber rack will be delayed by its PCB midplane, which reads as negative for CPO suppliers counting on that ramp, though Nvidia has not confirmed it. x.com  x.com 

POET Technologies and Sivers, as co-packaged optics pure plays, lose because CPO adoption has moved right by a full generation. SemiAnalysis reports Nvidia's flagship Kyber NVL144 rack is delayed over 12 months to 2028 and its NVL72x2 backup was cancelled, while optical scale-up won't arrive until Feynman. Packaging and interconnect hit physical walls in the same cycle, and the entire thesis for these names rests on CPO timing. x.com 

Bizlink is a beneficiary of Nvidia's faster-than-expected co-packaged optics ramp, because CPO carries higher content for it than near-packaged optics. Spectrum-X CPO switches are in mass production as key component yields improve, with scale-out switch shipments forecast at 15k in 4Q26 and 100k in 2027. Scale-up optical engine estimates were revised to 6.5m in 2027 and 42m in 2028, as NVL576 is intact but Trainium 4 is slower. Full NPO adoption is retained for the cycle. x.com  x.com 

The photonics-as-AI-bottleneck claim has faded, leaving Lumentum facing more pain before the theme recovers. A large December options node sits at $600; the stock bot targets downside at $650 and $595, with $581 a possible liquidity sweep where smart money would buy instead of rushing in at $650 or $630. Most photonics companies will likely never come back. x.com 

Optics and photonics should be among AI's biggest winners as faster GPU networks need optical connections that suppliers cannot expand quickly enough. Lumentum says some components are sold out through early 2029; Sivers is investing $30M to target more than 100M lasers a year, with operations expected in Q4 2027. Potential US restrictions on Chinese transceivers could reshape supply in 2027. Applied Optoelectronics and Sivers are the favorites. x.com  x.com 

Rising 1.6T switching demand favors optical suppliers, though their execution risks vary. Bank of America says the market could grow ~101% annually through 2030. Marvell's leading DSPs and Lumentum's supply-short 200G EML lasers are lowest risk; Applied Optoelectronics' capacity expansion and Fabrinet's customer concentration make them medium risk. Aeluma remains pre-commercial, while Lightwave Logic's polymer modulators are a high-risk moonshot despite its TSM partnership. x.com 

Applied Optoelectronics, Lumentum and Coherent face share losses at US hyperscalers to Innolight. Channel checks favor Innolight gaining share in Q2 2026, at the expense of those three. Per @poezhao0605, a $7B Hong Kong IPO, the largest in years and upsized from $5B on strong demand, has cleared its listing hearing. x.com 

Lumentum stands to gain as the shift from copper to light inside AI data centers accelerates. Co-packaged optics is now in mass production, per TrendForce, with Nvidia shipping Spectrum-X CPO switches. Near-packaged optics is catching on fast; Lumentum CEO Michael Hurlston says its demand looks bigger than CPO's and came sooner, now late 2027 or early 2028. He sees about $40 a share of fiscal 2028 earnings power, above Street estimates, with none of CPO or NPO in the numbers yet. x.com