title: Enhanced spectral breathing for sub-25 fs pulse generation in a Yb-fiber laser.
abstract: We demonstrate a dispersion-mapped Yb-fiber laser with enhanced intracavity spectral breathing. A staged filtering by dissipation through a 30 nm bandpass filter and nonlinear spectral compression results in a transform-limited narrow bandwidth seed pulse for the amplifier fiber. The pulse evolves in the active fiber without gain bandwidth limitation. Further spectral scaling is achieved by single mode fiber. Simulation predicts an overall spectral breathing ratio of as high as 40. Pulse duration of sub-25 fs with 2.3 nJ pulse energy was achieved in experiment.
authors.affiliation: Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Technical Science of Ministry of Education, College of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Lan
authors.forename: Youjian
authors.initials: Y
authors.lastname: Song
authors.forename: Minglie
authors.initials: M
authors.lastname: Hu
authors.forename: Bowen
authors.initials: B
authors.lastname: Liu
authors.forename: Lu
authors.initials: L
authors.lastname: Chai
authors.forename: Chingyue
authors.initials: C
authors.lastname: Wang
mesh_terms: D007834:Lasers; D055620:Optical Phenomena; D013057:Spectrum Analysis; D015018:Ytterbium
chemical_list: D015018:Ytterbium