A tunable fiber Fabry-Perot cavity for hybrid optomechanics stabilized at 4 K

Abstract

We describe an apparatus for the implementation of hybrid optomechanical systems at 4 K. The platform is based on a high-finesse, micrometer-scale fiber Fabry-Perot cavity, which can be widely tuned using piezoelectric positioners. A mechanical resonator can be positioned within the cavity in the object-in-the-middle configuration by a second set of positioners. A high level of stability is achieved without sacrificing either performance or tunability, through the combination of a stiff mechanical design, passive vibration isolation, and an active Pound-Drever-Hall feedback lock incorporating a reconfigurable digital filter. The stability of the cavity length is demonstrated to be better than a few picometers over many hours both at room temperature and at 4 K.

10 pages, 6 figures, 1 table

References in corpus (9)

• Quantum technologies with hybrid systems
• Fiber Fabry-Perot cavity with high finesse
• A perspective on hybrid quantum opto- and electromechanical systems
• Tunable Fiber Fabry-Perot Cavities with High Passive Stability
• A High-Mechanical Bandwidth Fabry-Perot Fiber Cavity
• Dynamical backaction in an ultrahigh-finesse fiber-based microcavity
• Photothermal optomechanics in superfluid helium coupled to a fiber-based cavity
• A millikelvin all-fiber cavity optomechanical apparatus for merging with ultra-cold atoms in a hybrid quantum system
• A mechanically stable and tunable cryogenic Fabry-Perot microcavity