LKB - Atom chips group

FFP Microcavity Technology

Progress in quantum technologies critically depends on the progress of optical cavities. This has spurred the development of optical microcavities. Our group has developed a fiber-based microcavity with exceptional properties, the Fiber Fabry-Perot (FFP) cavity. It combines small waist and high finesse F>100.000 with open access to the mode and built-in fiber coupling. This cavity is having a large impact in the field, It is now being used by many research groups around globe, using virtually all quantum emitters from trapped ions to carbon nanotubes. We collaborate with many of these groups (see publications page), further improving the technology that next-generation FFP cavities will have order-of-magnitude reduced loss, improved fiber coupling, larger length range and smaller waist. This will be breakthrough for light-matter quantum interfaces in our group and our partner groups, and may also generate new applications in telecom and other photonic technologies.