Femtosecond frequency combs are among the most precise measurement tools in existence. Sarah Hutter will provide an easy-to-implement guide for designing extremely stable femtosecond frequency combs. She will explain how you can tailor the noise properties and achieve extremely sharp comb lines at specific frequency positions and over an ultrabroadband spectrum. Since the approach maximizes the passive frequency stability, it does not require additional resources and is not limited by any locking bandwidth. She’ll also present a highly stable Er:fiber laser system and a new technology for generating 4-fs pulses with an extremely clean temporal envelope.