Ling Yun, Yang Qiu, Conghao Yang, Jie Xing, Kehan Yu, Xiangxing Xu, Wei Wei. PbS quantum dots as a saturable absorber for ultrafast laser[J]. Photonics Research, 2018, 6(11): 1028
- Photonics Research
- Vol. 6, Issue 11, 1028 (2018)
Fig. 1. (a) TEM image and (b) corresponding size distribution histogram of PbS QDs.
Fig. 2. (a) Linear absorption spectrum of the PbS QDs and (b) nonlinear transmission curve of the PbS QD-based SA.
Fig. 3. PbS QD mode-locked laser setup. Inset: digital photograph of the PbS QD mode locker fabricated on the fiber connector end.
Fig. 4. Mode-locked pulse characteristics. (a) Spectrum, (b) autocorrelation trace, (c) pulse train, and (d) radio frequency spectrum.
Fig. 5. (a) Average output power versus pump power in mode-locking states and (b) corresponding spectra at different pump powers.
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