Microcavity platforms 

The Qlibri Microcavity Platform was developed to lower the barrier for researchers integrating high-finesse cavities into their experiments—even within the vibration-prone environment of tabletop closed-cycle cryostats.

At its core is a planar–concave Fabry–Pérot microcavity, mounted on a custom-engineered, ultra-stiff positioning system. This system is mechanically decoupled from environmental vibrations via a passive damping stage, enabling continuous cavity length and lateral tuning over millimeter ranges with exceptional stability. The cavity signal can be collected in free space (transmission, parallel to the optical table) and/or via optical fiber (reflection). Operation is fully compatible with ambient conditions, offering flexibility for a range of experimental setups. 

Cavity control is handled by a fast, FPGA-based low-noise controller. A Python-based control software package is included, featuring standard measurement routines and with possibility for integration of additional hardware (e.g., spectrometers) for advanced experiments. 

To support your transition into high-finesse cavity physics, Qlibri offers comprehensive expert assistance—from experimental planning and cavity design simulations to hands-on troubleshooting. We provide a broad selection of stock and custom cavity mirrors, all easily exchangeable to maximize experimental versatility.

For highest stability requirements, an optional active stabilization module is available (upgradeable at any time), enabling side-of-fringe locking to a tunable, narrow-linewidth laser.

For experiments requiring magnetic fields, we offer an upgrade with Helmholtz coils capable of applying fields in the hundred-millitesla range perpendicular to the resonator axis.