Development

A laser design reaches a coherence length spanning the solar system

development2026-04-26

Claim

US and German physicists revived a 1990s concept to design lasers with about a hundred-microhertz linewidth, corresponding to a coherence length stretching from the Sun to the orbit of Uranus, a potential optical backbone for solar-system-scale links.

Reporting date: 2026-04-26 (not necessarily the event date)

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Welcome to April 26, 2026 (theinnermostloop.substack.com)

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Welcome to April 26, 2026

Evidence for

Supersedes

Artemis II validates laser links as the nervous system for orbital compute

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A laser design reaches a coherence length spanning the solar system
Innermost Loop KB — secondary record
Reporting date: 2026-04-26
KB permalink: https://nicholsn.github.io/innermost-loop-kb/developments/2026-04-26-a-laser-coherent-from-here-to-uranus
Claim: US and German physicists revived a 1990s concept to design lasers with about a hundred-microhertz linewidth, corresponding to a coherence length stretching from the Sun to the orbit of Uranus, a potential optical backbone for solar-system-scale links.
Attributed sources:
- Welcome to April 26, 2026 — https://theinnermostloop.substack.com/p/welcome-to-april-26-2026
This citation does not imply independent verification of linked-source claims.

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