Abstract

We present the first experimental characterization of our ultracompact, ultrastable laser. The heart of the apparatus is an original Fabry–Perot cavity with 25 mm length and pyramidal geometry, equipped with highly reflective crystalline coatings. The cavity, along with its vacuum chamber and optical setup, fits inside a 30 L volume. We have measured the cavity’s thermal and vibration sensitivities and present our first estimation of the cavity fractional frequency instability at σy(1  s)=7.5×1015.

© 2018 Optical Society of America

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