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Updated: May 10, 2026
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Published on: February 11, 2020
Lunar silicon cavity
Summary
Scientists propose deploying an ultrastable optical resonator in the Moon's permanently shadowed regions (PSRs). This technology will enable highly coherent laser systems for space-based quantum applications and lunar exploration.
Area of Science:
- Space Science
- Quantum Physics
- Optical Engineering
Background:
- Lunar permanently shadowed regions (PSRs) are extremely cold environments, ideal for sensitive experiments.
- PSRs offer proximity to solar power and potential resources, making them crucial for future lunar missions.
Purpose of the Study:
- To propose the deployment of a passive, ultrastable optical resonator in lunar PSRs.
- To leverage the unique lunar environment for advanced laser systems with unprecedented phase-coherence.
Main Methods:
- Utilizing the cryogenic conditions of lunar PSRs to construct a monolithic silicon cavity.
- Achieving ultra-low thermal noise-limited stability and coherence times exceeding 1 minute.
Main Results:
- Demonstrating a coherence time over a decade better than current terrestrial systems.
- Developing a laser system with unprecedented phase-coherence for space applications.
Conclusions:
- The proposed optical resonator is an enabling infrastructure for space-based quantum technology.
- Applications include lunar time standards, long-baseline optical interferometry, and testing fundamental physics.
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