title: Ultralow-threshold Kerr-lens mode-locked Ti:Al(2)O(3) laser.
abstract: An ultralow-threshold Kerr-lens mode-locked Ti:Al(2)O(3) laser achieved by use of an extended cavity design is demonstrated. Mode-locking thresholds as low as 156 mW are achieved. Pulses with durations as short as 14 fs and bandwidths of >100 nm with output powers of ~15 mW at 50-MHz repetition rates are generated by only 200 mW of pump power. Reducing the pump power requirements to a factor of 10x less than required by most conventional Kerr-lens mode-locked lasers permits inexpensive, low-power pump lasers to be used. This will facilitate the development of low-cost, high-performance femtosecond Ti:Al(2)O(3) laser technology.
authors.forename: A M
authors.initials: AM
authors.lastname: Kowalevicz
authors.forename: T R
authors.initials: TR
authors.lastname: Schibli
authors.forename: F X
authors.initials: FX
authors.lastname: Kärtner
authors.forename: J G
authors.initials: JG
authors.lastname: Fujimoto