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Two and four 3D-printed membranes stacked on top of a fiber mirror for collective optomechanical coupling to a fiber cavity.

Close-up of the central part with the actual cavity (length ~80 µm).

Fiber micromachining setup.

Fiber cavity with membrane on the left fiber mirror.

Loop antenna realized on an optical fiber; the fiber diameter is 125 µm.

Rectangular membrane (scanning electron microscope image).

Single loop microwave near-field antenna design for driving magnetic dipole transitions of atoms and ions.

Here, a fiber cavity is used together with an ion trap. For electrostatic shielding, the fibers are guided inside thin stainless steel tubes (horizontal) ...

A single Ytterbium trapped inside the cavity volume, and its blue fluorescence (composite image).

Two optical fiber mirrors are inserted into a glass ferrule glued on a piezoelectric actuator, to form a very compact monolithic fiber cavity.