Ytterbium-doped fiber laser passively mode locked by evanescent field interaction with CH3NH3SnI3 perovskite saturable absorber

Xiaozhi Bao, Haoran Mu, Yao Chen, Pengfei Li, Lei Li, Shaojuan Li, Khan Qasim, Yupeng Zhang, Han Zhang, Qiaoliang Bao

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Methylammonium tin triiodide (CH3NH3SnI3) as a kind of lead-free perovskite semiconductor materials has emerged as a star material for photonic applications. Herein, for the first time, we demonstrate CH3NH3SnI3 microcrystals grown directly on D-shaped fibers as saturable absorber for generating mode-locked pulses in fiber laser. The saturable absorber device shows a high nonlinear optical modulation depth of 15.2% and considerably low saturation absorption intensity of 76.5 MW cm-2. By incorporating the CH3NH3SnI3 saturable absorber into an ytterbium-doped (Yb-doped) fiber laser, stable mode-locking pulses were produced with a duration of 1.77 ns, maximum output power of 28.19 mW, 3 dB bandwidth of about 8.09 nm and a central wavelength at 1064 nm. The output pulses show representative characteristics of dissipative soliton with excellent long term stability and an energy efficiency of 5.6%. This study may facilitate the development of ultrafast photonic and optoelectronic functional devices based on lead-free perovskites.

Original languageEnglish
Article number375106
Number of pages6
JournalJournal of Physics D: Applied Physics
Issue number37
Publication statusPublished - 14 Aug 2018


  • fiber laser
  • mode-locking
  • nonlinear optics
  • perovskite

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