Runyu Wang, Qing Wang. Operation of femtosecond Kerr-lens mode-locked laser with all-normal dispersion at 2.4 μm (Invited)[J]. Infrared and Laser Engineering, 2021, 50(8): 20210352
- Infrared and Laser Engineering
- Vol. 50, Issue 8, 20210352 (2021)
Fig. 1. Experimental setup. DM: dichroic mirror; CM: chirped mirror; TM: third-order dispersion mirror; FL: focusing lens; H: hard aperture
Fig. 2. Curve of group delay dispersion. (a) Group delay dispersion curve of 1 mm Cr:ZnS, single CM and single TM; (b) Net round-trip group delay dispersion curve in the cavity
Fig. 3. (a) Simplified mode of resonator cavity; (b) Calculation of Kerr lens sensitivity in gain crystal
Fig. 4. Spectrum of output pulse
Fig. 5. Measurement and retrieved SHG-FROG traces of the output pulse
Fig. 6. Temporal profile retrieved from an SHG-FROG measurement
Fig. 7. Reconstructed spectrum intensity and phase distribution retrieved from an SHG-FROG measurement
Fig. 8. (a) Oscilloscope pulse trace of mode-locking pulses; (b) RF spectrum of the mode-locking pulses sequence
Fig. 9. Plot of the measured beam diameter of mode-locking pulses varied with distance
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Table 1. Parameters of SESAM or Kerr-lens mode-locked output pulses in Cr:ZnS
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