STT High-Speed Link: Optical Communication & Supply Chain Weekly | 2026.05.01 - 2026.05.07

1. Earnings Tracker: Lumentum Revenue Up 90%, 1.6T Optical Transceivers Confirmed to Ramp This Quarter

   • Lumentum (LITE) reported fiscal Q3 2026 results on May 5, 2026, with revenue of $808 million, roughly double the prior year. The highlight was 40% QoQ growth in its cloud service provider (CSP) business, and management guided that 1.6T products will enter volume production in fiscal Q4 (this quarter). However, CEO Michael Hurlston acknowledged that supply chain constraints on key components mean shipments still can't keep up with strong customer demand.

   • STT View: Lumentum's results confirm the market is on the eve of the 800G-to-1.6T transition. The biggest challenge isn't orders but capacity execution, especially the supply of EML (electro-absorption modulated laser) chips. Investors should note that Lumentum is raising the share of its in-house CW (continuous wave) lasers to lift gross margin. For Taiwan's supply chain, LandMark Optoelectronics (3081), a key upstream laser epi supplier, will see its yield performance directly cap how much profit it captures from this 1.6T shortage.

   • Source: Earnings call transcript: Lumentum Holdings Q3 2026 exceeds earnings expectations - Investing.com

2. Strategic Alliance: NVIDIA Invests $2B to Help Coherent Expand, Securing Indium Phosphide (InP) Supply

   • Coherent (COHR) reported results after the US market close on May 6, with revenue of $1.8 billion, above expectations. On the call it disclosed that NVIDIA (NVDA) has reached a strategic agreement to invest $2 billion to help Coherent expand its indium phosphide (InP) manufacturing capacity. The investment aims to secure stable laser chip supply for the 1.6T and 3.2T generations, with a target of doubling capacity in 2026.

   • STT View: After OSAT, this is NVIDIA's key move to reach even deeper into upstream materials. For NVIDIA, optical links now matter as much as compute; funding Coherent to lock up InP capacity effectively builds a moat for the 1.6T generation. For competitors such as Broadcom (AVGO) or Marvell (MRVL), it will push them to move to silicon photonics earlier to reduce dependence on specific laser chips — which also explains why silicon photonics adoption is arriving faster than originally expected.

   • Source: Coherent earnings up next: Can AI optics boom sustain margins? - Investing.com

3. Geopolitics: China's NDRC Blocks Meta's Acquisition, Extending AI Supply Chain "De-Risking" to Talent and IP

   • On May 5, 2026, China's National Development and Reform Commission (NDRC) formally announced that it had blocked Meta's (META) $2 billion acquisition of AI agent startup Manus under its national security review mechanism. The NDRC argued that moving the company's core team and R&D capabilities abroad would endanger supply chain security. It is the first time China has publicly used this power to stop AI technology from flowing to the West.

   • STT View: This marks the US-China tech rivalry extending from hardware to intellectual property and talent pools. For optical communications, it will accelerate the build-out of a "non-red" supply chain. When North American cloud service providers like Meta can't acquire innovative technology with Chinese roots, they will lean toward shifting R&D orders and technical partnerships to Taiwan. That is a long-term tailwind for Taiwanese startups with silicon photonics PIC design capability and for OSAT players such as ShunSin Technology (6451) and ASE (ASX).

   • Source: China Bulletin: May 5, 2026 - U.S.-China Economic and Security Review Commission

4. Technology Benchmark: TSMC COUPE Platform Counts Down to Commercialization; Silicon Photonics to Pass 50% Share in 2026

   • According to the latest reports from the OCP summit in early May, TSMC's COUPE silicon photonics integration platform is ready to enter high-volume production in the second half of 2026. Meanwhile, SEMI forecasts that silicon photonics modules will account for over 50% of the global optical transceiver market in 2026, up sharply from 33% in 2024.

   • STT View: Mass production of TSMC's COUPE is the optical industry's "iPhone moment." By using SoIC to solve the power bottleneck of electrical-optical integration, it will push co-packaged optics (CPO) from validation into mainstream commercialization. Investors should note that standard-setting power for the 3.2T generation is tilting toward foundries and OSATs. FOCI's (3363) close collaboration with TSMC on CPO connectors, along with demand for automated optical inspection equipment from All Ring Tech (6187) and Chroma ATE (2360), will be key things to watch over the next two quarters.

   • Source: TSMC's Silicon Photonics Platform COUPE to Enter Mass Production This Year, Targeting AI Data Center Optical Interconnect Opportunities - BigGo Finance

5. Market Trend: AI Optical Transceiver Market Expected to Reach $26 Billion in 2026

   • According to the latest market analysis, driven by NVIDIA's Rubin platform, the global market for AI-specific optical transceivers is expected to reach $26 billion in 2026. 1.6T has become standard across cloud service providers, and the market is now watching how quickly the transition to 3.2T happens in 2027.

   • STT View: At $26 billion, optical communications is no longer a niche supporting player in servers. As NVIDIA positions the Vera Rubin platform as a rack-scale "token factory," the share of optical interconnect in total system cost is rising fast. While watching Chinese leaders like Innolight (300308) and Eoptolink (300502), investors must keep an eye on their share of overseas capacity, because North American customers are now clearly more willing to accept pricing for "non-China-made" optical transceivers than for China-made products — which favors Foxconn (2317) and Accton (2345) with their global manufacturing footprints.

   • Source: AI Optical Transceiver Market Sees Explosive Growth, Projected to Reach $26 Billion in 2026 - BigGo Finance