Ultracompact reference ultralow expansion glass cavity

Alexandre Didier (1, 2) , Jacques Millo (2) , Baptiste Maréchal (2) , Cyrus Rocher (2) , Enrico Rubiola (2) , Roméo Lecomte (2) , Morvan Ouisse (2) , Jérome Delporte (3) , Clément Lacroute (2) , Yann Kersalé (2)

1 PTB - Physikalisch-Technische Bundesanstalt [Braunschweig]
2 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
3 CNES - Centre National d'Études Spatiales [Toulouse]

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)=7.5×10−15.

Domaines: Optique [physics.optics]

Alexandre Didier, Jacques Millo, Baptiste Maréchal, Cyrus Rocher, Enrico Rubiola, et al.. Ultracompact reference ultralow expansion glass cavity. Applied optics, 2018, 57 (22), pp.6470-6473. ⟨10.1364/AO.57.006470⟩. ⟨hal-02138795⟩