Laser stabilization to a cryogenic fiber ring resonator

Benjamin Merkel, Daniel Repp, Andreas Reiserer

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The frequency stability of lasers is limited by thermal noise in state-of-the-art frequency references. Further improvement requires operation at cryogenic temperature. In this context, we investigate a fiber-based ring resonator. Our system exhibits a first-order temperature-insensitive point around 3.55 K, much lower than that of crystalline silicon. The observed low sensitivity with respect to vibrations (<5 · 10−11 m−1 s2), temperature (−22(1) · 10−9 K−2), and pressure changes (4.2(2) · 10−11 mbar−2) makes our approach promising for future precision experiments.

Original languageEnglish
Pages (from-to)444-447
Number of pages4
JournalOptics Letters
Issue number2
StatePublished - 15 Jan 2021
Externally publishedYes


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