Precise motion control improves manufacturing of fiber optical microresonators. Florian Warken and Arno Rauschenbeutel, University of Mainz, and Thomas Bartholomäus, Newport Spectra-Physics GmbHThe advent of tunable narrowband lasers in the 1970s gave scientists a powerful tool to control and probe atoms and molecules, opening the door to an exciting world of quantum physics. When atoms and molecules are exposed to the intense electromagnetic fields created by laser light, they can be cooled and trapped, becoming prime objects for studying and illustrating interactions between light and matter at the ultimate microscopic level. 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