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arXiv · 1502.02608

8E-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
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Abstract

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 $\Delta \nu / \nu$ < 2E-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 to other cavity-stabilized lasers and to a strontium lattice clock an instability of below 1E-16 at averaging times from 1 s to 1000 s is revealed.

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Sebastian Häfner, Stephan Falke, Christian Grebing, Stefan Vogt, Thomas Legero, Mikko Merimaa, Christian Lisdat, Uwe Sterr. 2015-02-09. 8E-17 fractional laser frequency instability with a long room-temperature cavity. https://doi.org/10.1364/ol.40.002112

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