One of My Favorite Investments. 12 Ways to Play.

Gaetano · Gaetano · May 28, 2026 at 14:30 · ⏱ 1 min read  | Read on Substack ↗
Summary
The author argues that a structural shift in optical networking is underway, driven by AI training demand, and that multiple companies across the optical stack are signaling this supercycle. This means the entire optical supply chain—from components to fiber to systems—is poised for sustained growth, making sector exposure a compelling thematic play.
  • Ciena mentions distributed AI training; Nokia highlights AI and cloud orders; Lumentum notes pump lasers and narrow-linewidth components; Coherent discusses indium phosphide expansion; Corning has long-term hyperscaler fiber agreements; Lumen is signing dark fiber contracts.
  • The author sees these separate signals converging into a single architectural shift in optical networking infrastructure.
  • The report promises to detail '12 companies that have exposure' to this optical supercycle, though the full list is not provided in the excerpt.
Read time 1 min
Length 1,296 chars
Category finance
Trade Ideas
Gaetano Substack author, Gaetano
Author notes that Ciena's language around 'distributed AI training' is a recurring signal of the optical supercycle, indicating the company is benefiting from AI-driven demand for optical systems.
Author notes that Ciena's language around 'distributed AI training' is a recurring signal of the optical supercycle, indicating the company is benefiting from AI-driven demand for optical systems. Risk: Execution risk in scaling to meet hyperscaler demand; competition from Nokia and other vendors.
Gaetano Substack author, Gaetano
Author points to Nokia's 'AI and cloud orders' as a key thread in the optical supercycle narrative, suggesting the company's optical networking segment is seeing increased orders from AI infrastructur
Author points to Nokia's 'AI and cloud orders' as a key thread in the optical supercycle narrative, suggesting the company's optical networking segment is seeing increased orders from AI infrastructure buildouts. Risk: Legacy telecom exposure may dilute optical growth; market share dynamics with Ciena and Huawei.
Gaetano Substack author, Gaetano
Author highlights Lumentum's comments on 'pump lasers and narrow-linewidth components,' which are critical for high-power optical amplification in AI data centers, implying direct revenue exposure to
Author highlights Lumentum's comments on 'pump lasers and narrow-linewidth components,' which are critical for high-power optical amplification in AI data centers, implying direct revenue exposure to the supercycle. Risk: Customer concentration and cyclicality in telecom spending; supply chain constraints for specialty components.
Gaetano Substack author, Gaetano
Author cites Corning's 'long-term hyperscaler fiber agreements,' indicating that hyperscalers are locking in fiber capacity for AI training networks, directly benefiting Corning's optical fiber and ca
Author cites Corning's 'long-term hyperscaler fiber agreements,' indicating that hyperscalers are locking in fiber capacity for AI training networks, directly benefiting Corning's optical fiber and cable segment. Risk: Fiber demand is lumpy and tied to hyperscaler capex cycles; pricing pressure from alternative suppliers.
Gaetano Substack author, Gaetano
Author mentions Coherent's 'indium phosphide expansion plans,' a key material for high-speed optical transceivers used in AI clusters, signaling capacity investment to capture supercycle demand.
Author mentions Coherent's 'indium phosphide expansion plans,' a key material for high-speed optical transceivers used in AI clusters, signaling capacity investment to capture supercycle demand. Risk: Integration risks from prior acquisitions; competition from Lumentum and new entrants in InP lasers.
Gaetano Substack author, Gaetano
Author notes Lumen's 'dark fiber contracts' as part of the optical supercycle signal, implying the company is monetizing its fiber network to support AI-driven data transport needs.
Author notes Lumen's 'dark fiber contracts' as part of the optical supercycle signal, implying the company is monetizing its fiber network to support AI-driven data transport needs. Risk: High debt load and legacy business drag; competition from other fiber providers and new entrants.
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