title: High average power, widely tunable femtosecond laser source from red to mid-infrared based on an Yb-fiber-laser-pumped optical parametric oscillator.
abstract: We report on the highly efficient generation of widely tunable femtosecond pulses based on intracavity second harmonic generation (SHG) and sum frequency generation (SFG) in a MgO-doped periodically poled LiNbO(3) optical parametric oscillator (OPO), which is pumped by a Yb-doped large-mode-area photonics crystal fiber femtosecond laser. Red and near infrared from intracavity SHG and SFG and infrared signals were directly obtained from the OPO. A 2 mm β-BaB(2)O(4) is applied for Type I (oo → e) intracavity SHG and SFG, and then femtosecond laser pulses over 610 nm ~ 668 nm from SFG and 716 nm ~ 970 nm from SHG are obtained with high efficiency. In addition, the oscillator simultaneously generates signal and idler femtosecond pulses over 1450 nm ~ 2200 nm and 2250 nm ~ 4000 nm, respectively.
authors.affiliation: Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, College of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
authors.forename: Chenglin
authors.initials: C
authors.lastname: Gu
authors.forename: Minglie
authors.initials: M
authors.lastname: Hu
authors.forename: Limeng
authors.initials: L
authors.lastname: Zhang
authors.forename: Jintao
authors.initials: J
authors.lastname: Fan
authors.forename: Youjian
authors.initials: Y
authors.lastname: Song
authors.forename: Chingyue
authors.initials: C
authors.lastname: Wang
authors.forename: Derryck T
authors.initials: DT
authors.lastname: Reid
mesh_terms: D007834:Lasers; D055620:Optical Phenomena; D013997:Time Factors; D015018:Ytterbium
chemical_list: D015018:Ytterbium