Renyan Wang, Liang Jin, Jiazhu Wang, Shangzhi Xie, Xiaohui Li, Yingtian Xu, He Zhang, Xin Zhao, Xiaohui Ma. Harmonic mode-locked fiber laser based on microfiber-assisted nonlinear multimode interference[J]. Chinese Optics Letters, 2022, 20(1): 010601
- Chinese Optics Letters
- Vol. 20, Issue 1, 010601 (2022)
Fig. 1. Schematic diagram of the tapered SMS structure.
Fig. 2. (a) Relationship between the diameter of GIMF and the beat length. (b) The number of self-imaging points. (c) Self-imaging points in the tapered GIMF.
Fig. 3. (a) Microscope image of the tapered SMS. (b) Nonlinear transmission curves of tapered SMS.
Fig. 4. Diagram of fiber laser based on SMS-tapered ultrafast optical switch.
Fig. 5. (a) Pulse trains of various harmonic orders. (b) Pulse profiles of various harmonic orders. (c) RF spectrum of 16th harmonic order. (d) Repetition rates of 16th HML observed at different times.
Fig. 6. Relationship between pump power and harmonic order at different waist diameters of tapered SMS.
Fig. 7. Spectra of laser with various waist diameters.
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Table 1. Pump Threshold for Harmonic Orders at Different Waist Diameters
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