Which Optics Stock Has Dominated in 2026: Applied Optoelectronics, Lumentum, or Coherent?

The optics complex has been one of 2026’s most rewarding corners of the AI infrastructure trade, and the spread among the three leaders is surprisingly wide. Applied Optoelectronics (NASDAQ:AAOI) shares are up roughly 441% year to date, dwarfing the gains posted by Lumentum (NASDAQ:LITE | LITE Price Prediction) and Coherent (NYSE:COHR) over the same window.

On Tuesday afternoon, AAOI stock is hovering near $184 and is down by just 1% for the day. Meanwhile, LITE stock is down 7% to around $978 and COHR shares are off 4% to $363. Today’s pullback in LITE stock and COHR shares is a reminder that even the strongest AI-linked optics names are still volatile.

Optical connectivity has emerged as one of the critical bottlenecks for AI data center buildouts, where Applied Optoelectronics, Lumentum, and Coherent compete. As GPU clusters scale to hundreds of thousands of accelerators, copper interconnect runs out of headroom and fiber optics takes over.

Applied Optoelectronics: The Pure-Play Winner

AAOI has dominated the group with the aforementioned 441% gain in 2026 so far. Furthermore, Applied Optoelectronics stock is on a stunning 934% one-year run. The catalyst is the company’s transformation into a U.S.-based high-volume producer of AI data center transceivers.

Applied Optoelectronics’ Q1 2026 revenue came in at $151.14 million, up 51% year over year, with the datacenter segment more than doubling to $81.4 million. The company also “completed our first volume shipment of our 800G products to one of our large hyperscale customers in Q1,” per Applied Optoelectronics CEO Thompson Lin.

Management guided Q2 2026 revenue to $180 million to $198 million and projected that Applied Optoelectronics’ full-year revenue could exceed $1 billion. The pure-play AI optics exposure, combined with a smaller market cap of around $14.84 billion, means each design win has outsized impact on Applied Optoelectronics shares.

Lumentum: Analyst Enthusiasm Meets Today’s Selloff

Lumentum stock has rallied 166% year to date and is up an eye-watering 1,269% over the past year, the best one-year showing of the trio. The company’s fiscal Q2 2026 revenue jumped 66% year over year to $665.5 million.

Lumentum CEO Michael Hurlston noted an Optical Circuit Switch (OCS) backlog above $400 million and an incremental multi-hundred-million-dollar co-packaged optics order deliverable in the first half of calendar 2027. Wall Street has piled in, with LITE stock price target hikes from Jefferies to $1,200, JPMorgan to $1,130, Morgan Stanley to $900, and Barclays to $1,000.

Reddit traffic captured the mood, with a thread titled “Lumentum $LITE is the next bottleneck” driving sustained engagement. Today’s 7% intraday drop is a reminder that valuation matters after a parabolic year.

Coherent: Diversified, Steadier, and NVIDIA-Backed

Coherent shares are up 97% year to date and 367% over the past year. Fiscal Q3 2026 revenue rose 21% year over year to $1.806 billion.

The big strategic story is a deepening NVIDIA (NASDAQ:NVDA) partnership, anchored by a $2 billion NVIDIA investment in Coherent and a recent $2 billion stock issuance. Coherent also entered the S&P 500, lending institutional validation.

The trade-off is the 16% year-over-year decline in the Industrial segment, which has dampened the pure AI-driven upside seen elsewhere. The Coherent forward P/E ratio sits near 159x, leaving the stock priced for continued execution.

What to Watch Next

The clear year-to-date winner is Applied Optoelectronics, though Lumentum stock has the best one-year performance. In any case, each business profile carries distinct risks worth weighing.

Applied Optoelectronics faces customer concentration and execution risk as Houston capacity ramps. Lumentum trades at a stretched 159x P/E ratio after its monster one-year run, and Coherent’s industrial cycle exposure could continue to cap near-term upside relative to its pure-play peers.

Prudent investors may want to track whether today’s pullback in LITE and COHR shares stabilizes into the close, and whether AAOI stock can hold above the $180 level as the Q2 ramp begins. The next anticipated major catalysts are Applied Optoelectronics’ Q2 2026 print and any follow-on NVIDIA capacity commentary tied to Coherent’s manufacturing buildout.