8×10-17 fractional laser frequency instability with a long room-temperature cavity

Sebastian Häfner, Stephan Falke, Christian Grebing, Stefan Vogt, Thomas Legero, Mikko Merimaa, Christian Lisdat, Uwe Sterr

    Research output: Contribution to journalArticleScientificpeer-review

    218 Citations (Scopus)


    We present a laser system based on a 48 cm long optical glass resonator. The large size requires a sophisticated thermal control and optimized mounting design. A self-balancing mounting was essential to reliably reach sensitivities to acceleration of below Δν/ν < 2 × 10-10/g in all directions. Furthermore, fiber noise cancellations from a common reference point near the laser diode to the cavity mirror and to additional user points (Sr clock and frequency comb) are implemented. Through comparison with other cavity-stabilized lasers and with a strontium lattice clock, instability of below 1 × 10-16 at averaging times from 1 to 1000 s is revealed.

    Original languageEnglish
    Pages (from-to)2112-2115
    Number of pages4
    JournalOptics Letters
    Issue number9
    Publication statusPublished - 1 Jan 2015
    MoE publication typeA1 Journal article-refereed


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