LITE: The TSMC Of Light

Asymmetrical Bets · Asymmetrical Bets · August 11, 2026 at 23:40 · ⏱ 7 min read  | Read on Substack ↗
Summary
Lumentum is positioned as the critical bottleneck in the AI optical supply chain because it controls the largest share of EML laser production and demand is outstripping supply across every architecture. That means pricing power, capacity expansion, and long-term agreements with NVIDIA should drive outsized growth for LITE, even as dilution and a possible China InP export ban loom. The article treats the optical laser shortage as a multi-year structural trade.
  • Lumentum's EML lasers go into the majority of 800G transceivers shipped today, with customers including Innolight, Eoptolink, and Fabrinet, which assembles for NVIDIA; if Lumentum can't ship lasers, the transceiver chain slows.
  • LITE, Broadcom, and Mitsubishi Electric control 72% of global EML capacity, with Lumentum first; the industry is more than 30% short on EML supply and 200G EML ASPs are roughly double 100G EML.
  • LITE's pump lasers grew 80% YoY and narrow-linewidth laser shipments grew 120% YoY for a ninth straight quarter; management says pump supply is tight enough that they choose which customers get allocation.
  • Capacity expansion from the 4-inch InP wafer transition and Japan fab should push laser output up roughly 50% from December 2025 to December 2026; Greensboro opens in 2028 with ~$5B annual revenue capacity, half already committed to NVIDIA via LTA.
  • NVIDIA took a $2B equity stake in Lumentum and Coherent combined in March, with a purchase commitment worth several billions; preferred conversion adds ~7M shares, bringing diluted count to ~102M.
  • High-power CPO lasers consume 5-10x the InP die area of a 100G EML; Lumentum and Broadcom are a duopoly in this market, with Coherent estimated ~18 months behind and AAOI roughly 2-3 years out.
Read time 7 min
Length 7,453 chars
Category finance
Ideas
Asymmetrical Bets Substack author, Asymmetrical Bets
Article highlights LITE's 72% EML market share, 50% gross margin, 109% YoY revenue growth, and 8% guide beat, and says if Lumentum can't ship enough lasers, the whole transceiver supply chain slows do
Article highlights LITE's 72% EML market share, 50% gross margin, 109% YoY revenue growth, and 8% guide beat, and says if Lumentum can't ship enough lasers, the whole transceiver supply chain slows down — validating its role as a critical optical bottleneck with pricing power. Risk: NVIDIA preferred stock conversion adds ~7M shares, diluting to ~102M, and a China InP substrate export ban could disrupt the capacity expansion.
Asymmetrical Bets Substack author, Asymmetrical Bets
Article says Lumentum and Broadcom are a duopoly in high-power CPO lasers and AVGO is one of three controllers of EML capacity, so the same tight supply and rising ASPs that lift LITE also support Bro
Article says Lumentum and Broadcom are a duopoly in high-power CPO lasers and AVGO is one of three controllers of EML capacity, so the same tight supply and rising ASPs that lift LITE also support Broadcom's optical laser economics. Risk: AVGO's optical business is a small slice of a much larger semiconductor company, and the article provides no AVGO-specific financials or exposure sizing.
Asymmetrical Bets Substack author, Asymmetrical Bets
Article quotes AAOI saying demand for its products runs 20-40% above what it can build, and says AAOI is expanding at every level of the supply chain, implying strong near-term revenue and pricing sup
Article quotes AAOI saying demand for its products runs 20-40% above what it can build, and says AAOI is expanding at every level of the supply chain, implying strong near-term revenue and pricing support. Risk: AAOI is estimated 2-3 years behind in high-power CPO lasers, so its competitive position in next-gen architectures is weaker than LITE and AVGO.
Asymmetrical Bets Substack author, Asymmetrical Bets
Article places Coherent about 18 months behind in high-power CPO lasers, questions the stability of its MOPA architecture, and notes it hasn't published phase noise or linewidth data under real operat
Article places Coherent about 18 months behind in high-power CPO lasers, questions the stability of its MOPA architecture, and notes it hasn't published phase noise or linewidth data under real operating conditions — competitive limitations vs LITE and AVGO. Risk: NVIDIA's $2B combined equity stake in Lumentum and Coherent, plus the multi-billion purchase commitment, gives Coherent an offsetting demand backstop.
Asymmetrical Bets Substack author, Asymmetrical Bets
Article says AXTI is on track to 2x InP substrate capacity in 2026 and expand further in 2027, easing the substrate bottleneck that LITE's fab expansion depends on — a direct supplier beneficiary of t
Article says AXTI is on track to 2x InP substrate capacity in 2026 and expand further in 2027, easing the substrate bottleneck that LITE's fab expansion depends on — a direct supplier beneficiary of the laser capacity build. Risk: The easing could be halted by a Chinese InP substrate export ban, which the article explicitly flags as the main external threat to the optical supply chain.
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This newsletter, published August 11, 2026, features Asymmetrical Bets discussing LITE, AVGO, AAOI, COHR, AXTI. 5 trade ideas extracted by AI with direction and confidence scoring.

Speakers: Asymmetrical Bets  · Tickers: LITE, AVGO, AAOI, COHR, AXTI