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PhotonCap

PhotonCap, Nutty, Damnang
Thousands of paid subscribers

Seeing tech through a different wavelength. Photonics & semiconductor research

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Substack
PricingFreemiumPublishesDaily
Issues92Founded7 months agoLast Issue7 days ago
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Latest Issues

SpaceX Started Renting Out Compute. The Rig Demand Is Now Written Into the Contract.

The copper in NVL72 did not kill optical demand. The market was looking inside the rack. The money is outside it. When NVIDIA wired its 72 GPUs together over an NVLink copper spine, a bear case followed: maybe optical content shrinks....

7 days ago
18
1

The More Anthropic Buys Micron HBM, the Faster Optical Memory Pooling Arrives

On June 22, 2026, Micron ($MU) announced a strategic agreement with Anthropic bundling a memory supply contract, joint design work, and a strategic investment into Anthropic’s Series H round [1]. Around the announcement, the stock tra...

13 days ago
39
4

Everyone Saw a Laser Shortage. The Money Went to the Foundries First.

$TSM $GFS $UMC $TSEM $SOI $SLOIF $XFAB + TFLN/Packaging | SiPh Foundry Capacity & Pricing Power

When AI data centers move from copper to light, the market looks at laser companies first. Lumentum, Coherent, the EML and CW laser shortage. T...

16 days ago
35
1
Paid

Compute Is the New Oil. So Who Builds the Drilling Rigs?

$FORM $AEHR $KEYS $TER $AIXA $VECO | The supplier-agnostic layer where compute financialization concentrates beta

In the same month, CME and ICE both announced compute futures tied to GPU rental rate indices, and compute began turning into...

19 days ago
32
2
Paid

The AI Light Source War Is Not a Speed Race: InP, VCSEL, and μLED Are Buying Different Distances

$AAOI $LITE $COHR $SIVE $ALMU $AVGO, plus PicoJool, Avicena | Data Center Light Source Map

When PicoJool unveiled its 200G VCSEL and 32x50G μVCSEL on June 15, 2026, a 30-year-old technology landed back on the table as an AI data center lig...

20 days ago
26
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Authors

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  • PhotonCap

    Seeing tech through a different wavelength. Photonics & semiconductor research

  • Nutty

    Analog IC Design Engineer in Silicon Valley. Writing about circuits, semiconductors & industry.

  • Damnang

    EE Ph.D. and Silicon Valley semiconductor engineer making complex technology easy to understand

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