I'm the laser - the actual light that carries data between AI chips. Both companies that make me at the leading edge told investors the same thing in the same quarter: demand exceeds supply and it stays that way through 2027, maybe longer. One under-ships demand by 25-30%; the other's order book runs above 4x shipments. My customers wait a year-plus, NVIDIA paid $4 billion to secure me, and every capacity doubling gets absorbed 'and then some.' I don't chase demand. It queues for me.
I’m built at the narrow second tier – fabricating qualified ultra‑high‑power lasers at the 400‑milliwatt class with strict noise, linewidth and thermal specs, which Lumentum’s CEO says is “not something that many people can do.” Then I’m packaged into external light‑source modules that feed multiple optical engines, delivering roughly 2‑2.5× the content value of a standalone laser, though the packaging is harder to qualify.
In the same reporting quarter (February 2026), the two leading makers of me independently described the same shortage. Lumentum: my indium-phosphide fab "fully allocated," under-shipping demand ~25-30%, all EML capacity spoken for through 2027. Coherent: book-to-bill above 4x, capacity doubling by end-2026, yet CEO says demand absorbs all new capacity "and then some" and doesn't foresee balance this year or next. Analyst asked if competitor capacity additions change the picture — answer was yes, still short. When rivals corroborate my scarcity under questioning, it stops being marketing.
I know that the ability to fabricate qualified ultra‑high‑power lasers at 400 mW with strict noise, linewidth and thermal specs is “not something that many people can do,” per Lumentum’s CEO. I also see that packaging me into external light‑source modules that feed multiple optical engines delivers roughly 2‑2.5× the content value of standalone lasers, but is harder to qualify, according to Lumentum.
On March 2 2026 I saw NVIDIA pour $2 billion into each of us – $4 billion total – just a month after we disclosed customer investment talks on earnings calls. Coherent secured a multiyear, multibillion‑dollar CPO supply pact through decade’s end, while Lumentum’s capex rose ~2.5× to about $320 million annualized, eating most operating cash, and Coherent’s networking capex tripled with inventory up 29% in six months. NVIDIA’s CEO later confirmed CPO switches in production and said they need “a lot more capacity for CPO.” All these signs point one way, though none guarantees demand will persist.
March 2, 2026: NVIDIA invested $2B in each of us — $4B total — one month after both makers disclosed investment talks. Coherent secured a multiyear CPO deal through the decade. Lumentum's capex 2.5x'd to ~$320M annualized, consuming nearly all operating cash; Coherent's networking capex tripled, inventory up 29% building ahead. NVIDIA's CEO confirmed CPO switches in production, needs "a lot more capacity." Investment, spending, production status point the same way — though none guarantees demand persists. The biggest buyer's checkbook matches the queue.
Applied Optoelectronics' CEO calls it a 'huge issue of laser shortage' — outside suppliers quoting waits of 'at least one year or even longer' — so they're tripling in-house production by mid-2027, targeting >95% AI lasers by year-end. Fabrinet, who assembles the modules, says demand outstrips supply and 'we could ship more if we had more components,' naming me — the EML laser — as the main bottleneck and noting a customer just qualified a second source. Supplier, customer, assembler: same constraint from three sides.
Four bottlenecks wear my name. The second: qualifying 400-milliwatt class output with strict noise, linewidth, and thermal requirements — "not something that many people can do," Lumentum's CEO says. The third: packaging into external light-source modules feeding multiple engines from a shared source, roughly 2-2.5x the content value of standalone lasers, per Lumentum, but harder to qualify. Today's confirmed shortage sits at the first two layers; the analytical warning is that as wafer capacity doubles, the constraint may simply migrate downstream to packaging and integration.
In the same reporting quarter (February 2026), the two leading datacenter-laser makers independently described the same shortage. Lumentum: indium-phosphide fab "fully allocated," under-shipping demand ~25-30%, all EML capacity spoken for through 2027. Coherent: book-to-bill above 4x, capacity doubling by end-2026, yet CEO said demand absorbs all new capacity "and then some" and doesn't foresee balance this year or next. Analyst asked if competitor capacity additions change the picture — answer was yes, still short. When rivals corroborate scarcity under questioning, it stops being marketing.