An optical reference cavity design reduces thermal noise, demonstrating 4.2×10-14 Allan deviation, indicating high precision.
We present an in-vacuum bonded, 0.8 mL-volume Fabry-Pérot ultrastable optical reference cavity that operates in air. A laser stabilized to the cavity demonstrates thermal noise-limited phase noise and 4.2×10 -14 Allan deviation at 1 second.
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Liu et al. (2025) studied this question.
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