FOCI is positioned for a coming fiber-array-unit bottleneck in co-packaged optics, where supply cannot meet demand. Per UDN, Largan Precision, FOCI and China's TFC have entered Nvidia's FAU supply chain; about 20,000 Spectrum-X systems shipped this year would need roughly 600k-700k FAUs, demand should reach several million units in 2027, and existing capacity cannot meet it. It is a tad early, with mass production expected in H2 2027. x.com 

FOCI Fiber Optic Communications could sit at the center of Nvidia's co-packaged optics supply chain as AI data centers move from pluggable fiber to CPO in 2026. It has built fiber array units with TSMC for over three years, has 1.6T and 3.2T specs in the pipeline, and its proprietary ReLFACon technology removes the need for separate transceivers. A patent trail linking FOCI, Himax and TSMC suggests it is Nvidia's exclusive CPO fiber array supplier. A daily SuperTrend buy signal just confirmed. … Show more

FOCI's ReLFACon reflowable lensed fiber array connector is its moat in CPO: it links fiber arrays directly into silicon-photonics CPO modules with heat-tolerant materials matching the chip's thermal expansion, holding alignment through hot packaging. Its fiber array units, about 40% of CPO module cost, partly decide whether CPO can be mass-produced. Himax and TSMC ties make it Taiwan's core FAU player. @aleabitoreddit expects Nvidia's Computex keynote to lift Taiwan optics including FOCI. x.com 

Fiber and connectors account for almost 30% of co-packaged optics costs, enlarging Corning's opportunity in optical scale-up. Fiber and InP lasers are the bottlenecks in this reading of CPO; @carrioresearch reports that Corning supplied high-density arrays and connectors for Lightmatter's OCP trays. x.com 

FOCI still has substantial upside as the confirmed sole supplier of fiber array units for TSMC's COUPE optical engine, used in NVIDIA's Vera Rubin generation, with generations 1 and 2 locked. Fiber array units are the biggest market in co-packaged optics, and its patented ReLFACon design is hard to replicate. Even if FOCI is later designed out, as @aleabitoreddit warns, it must still fill large first- and second-generation orders. Weak financials, no parent support and Chinese rivals are risks. … Show more

The shift from copper to light inside AI data centers is accelerating, and near-packaged optics is pulling optical demand forward. Lumentum's CEO said NPO demand looks bigger than CPO and arrived sooner, and he sees about $40 per share of fiscal 2028 earnings power, above sell-side estimates, with none of it in the numbers yet. Coherent's CEO said CPO and NPO engagement has jumped, with comparable content per socket. NVIDIA has moved its Spectrum-X CPO switch into full production. x.com 

Coherent should benefit as the shift from copper to light inside AI data centers accelerates, with co-packaged optics now in production and near-packaged optics pulling revenue forward. Nvidia's Spectrum-X Photonics switch is in full production, and TrendForce says CPO has entered mass production. Coherent CEO Jim Anderson says CPO and NPO engagement jumped in the past three to six months, nearly every large customer has a project, and its content per socket is similar in either design. x.com 

Lumentum stock should still perform strongly as OCS, CPO and cloud transceivers could reach 60% of revenue by 2030, more than offsetting even a full EML loss. Beyond TFLN cannibalizing 400G/lane EML modulation in 3-plus years, a shift from one laser per lane to two CW lasers for eight lanes could reduce laser sales in 3-5 years. x.com 

Fittech still looks good despite vertical-integration worries, because it addresses bottlenecks that make sense to outsource. Its known-good-die test and sort for DFB and EEL lasers tackles one key bottleneck, and its FAU assembly automation means machine sales either to companies bringing that work in-house or to companies offering it as a service. 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