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search.filters.applied.f.access: openAccess × DDC: 530 × Type: Text × Publisher: Washington, DC : Soc. × Subject: Fiber lasers × Subject: Laser mirrors × Subject: Pulse repetition rate ×

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    Semiconductor saturable absorber mirror mode-locked Yb:YAP laser
    (Washington, DC : Soc., 2022) Lin, Zhang-Lang; Xue, Wen-Ze; Zeng, Huang-Jun; Zhang, Ge; Zhao, Yongguang; Xu, Xiaodong; Xu, Jun; Loiko, Pavel; Mateos, Xavier; Lin, Haifeng; Petrov, Valentin; Wang, Li; Chen, Weidong
    We report on sub-30 fs pulse generation from a semiconductor saturable absorber mirror mode-locked Yb:YAP laser. Pumping by a spatially single-mode Yb fiber laser at 979 nm, soliton pulses as short as 29 fs were generated at 1091 nm with an average output power of 156 mW and a pulse repetition rate of 85.1 MHz. The maximum output power of the mode-locked Yb:YAP laser amounted to 320 mW for slightly longer pulses (32 fs) at an incident pump power of 1.52 W, corresponding to a peak power of 103 kW and an optical efficiency of 20.5%. To the best of our knowledge, this result represents the shortest pulses ever achieved from any solid-state Yb laser mode-locked by a slow, i.e., physical saturable absorber.
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    Watt-level femtosecond Tm-doped “mixed” sesquioxide ceramic laser in-band pumped by a Raman fiber laser at 1627 nm
    (Washington, DC : Soc., 2022) Zhang, Ning; Wang, Zhanxin; Liu, Shande; Jing, Wei; Huang, Hui; Huang, Zixuan; Tian, Kangzhen; Yang, Zhiyong; Zhao, Yongguang; Griebner, Uwe; Petrov, Valentin; Chen, Weidong
    We report on a semiconductor saturable absorber mirror mode-locked Tm:(Lu,Sc)2O3 ceramic laser in-band pumped by a Raman fiber laser at 1627 nm. The nonlinear refractive index (n2) of the Tm:(Lu,Sc)2O3 ceramic has been measured to be 4.66 × 10-20 m2/W at 2000 nm. An average output power up to 1.02 W at 2060 nm is achieved for transform-limited 280-fs pulses at a repetition rate of 86.5 MHz, giving an optical efficiency with respect to the absorbed pump power of 36.4%. Pulses as short as 66 fs at 2076 nm are produced at the expense of output power (0.3 W), corresponding to a spectral bandwidth of 69 nm. The present work reveals the potential of Tm3+-doped sesquioxide transparent ceramics for power scaling of femtosecond mode-locked bulk lasers emitting in the 2-μm spectral range.