Fiber Fabry-Perot cavities in atomic and solid-state cavity QED
High-finesse optical cavities have become an enabling tool for applications such as spin squeezing, single photon generation, quantum optomechanics, and many others. Typical requirements are small mode volume, ultralow losses and miniature size. We have developed a fiber-based Fabry-Perot (FFP) cavity with laser-machined mirrors that combines theses features with easy tunability, open access to the cavity mode, and built-in, highly efficient coupling to a single-mode fiber.
I will discuss two recent experiments with FFP cavities in different domains.
In the first experiment, the cavity is used to generate and tomographize entangled states in a mesoscopic atomic ensemble. The second experiment demonstrates strong coupling between the fiber cavity mode and polaritons in a semiconductor quantum well.