title: Ultrabroadband ring oscillator for sub-10-fs pulse generation.
abstract: A four-mirror ring cavity formed by chirped dielectric mirrors is proposed for self-mode-locked solid-state lasers. It offers, for the first time to our knowledge, the potential for approaching the gain-bandwidth limit in Ti:sapphire and related broadband lasers. Using this concept, we produced nearly bandwidth-limited 7.5-fs pulses from a feedback-initiated, self-mode-locked Ti:sapphire ring oscillator. Our experiments provide new insight into the physics and limitations of sub-10-fs oscillators.
authors.forename: L
authors.initials: L
authors.lastname: Xu
authors.forename: C
authors.initials: C
authors.lastname: Spielmann
authors.forename: F
authors.initials: F
authors.lastname: Krausz
authors.forename: R
authors.initials: R
authors.lastname: Szipöcs