Yangyu Liu, Xue Cao, Anhua Xian, Haotian Wang, Jianing Zhang, Wei Zhou, Dingyuan Tang, Deyuan Shen, Yishan Wang. Research Progress of 1 μm Band Period Ultrafast Laser[J]. Laser & Optoelectronics Progress, 2022, 59(11): 1100003
- Laser & Optoelectronics Progress
- Vol. 59, Issue 11, 1100003 (2022)
![Global and Chinese laser sales revenue, from 2014 to 2019[3]](/richHtml/lop/2022/59/11/1100003/img_01.jpg)
Fig. 1. Global and Chinese laser sales revenue, from 2014 to 2019[3]
![Mode-locked laser based on graphene-saturable absorption mirror. (a) Device diagram; (b) spectrum of mode-locked pulse (inset: output laser spot) [15]](/richHtml/lop/2022/59/11/1100003/img_02.jpg)
Fig. 2. Mode-locked laser based on graphene-saturable absorption mirror. (a) Device diagram; (b) spectrum of mode-locked pulse (inset: output laser spot) [15]
![Kerr lens Yb∶Lu2O3 disc mode-locked laser cavity type diagram[16]](/Images/icon/loading.gif){kind=icon}
Fig. 3. Kerr lens Yb∶Lu2O3 disc mode-locked laser cavity type diagram[16]
Fig. 4. Laser spectra of Kerr lens Yb∶Lu2O3 disc mode-locked laser with different pulse widths[16]
Fig. 5. Experimental results. (a) Mode-locked spectrum; (b) autocorrelation trace retrieved by the algorithm [26]
Fig. 6. Time-dissipating solitons arise in free space. (a) Installation drawings; (b) autocorrelation curve of driving pulse (yellow) and intra-cavity pulse (red) [27]
Fig. 7. Soliton pulse compression[28]
Fig. 8. Mode self-cleaning under resonant conditions. (a) Camera picture of modulated laser beam; output beam profiles measured in the far field for（b）diffractive region，（c）solitary mode，and（d）dissipative region；（e）filtering efficiency as a function of blocker position（Δx）［28］
Fig. 9. Properties characterization of output laser in Kerr lens mode-locked laser. (a) Spectrum; (b) corresponding strength autocorrelation trace[34]
Fig. 10. High power Kerr lens mode-locked Yb∶CALYO laser device diagram[35]
Fig. 11. Laser spectra and intensity autocorrelation curves of KLM pulses. (a) Laser spectrum of KLM pulse of Yb∶CYA laser with CaF2 as Kerr medium; (b) intensity autocorrelation curve of pulse[35]
Fig. 12. Mode-locked spectra and intensity autocorrelation trajectories measured in a Yb∶GdYCOB laser. (a) Mode-locked spectrum; (b) intensity autocorrelation trajectory (inset: autocorrelation trajectory in the time range of 40 ps) [37]
Fig. 13. Experimental setup of the KLM Yb∶CALYO laser [38]
Fig. 14. Experimental results. (a) Measured optical spectrum of the mode-locked pulses (blue line) and the polarized emission spectra of Yb∶CALYO crystal (black and red lines); (b) measured interferometric autocorrelation trace of the mode-locked pulses [38]
Fig. 15. Yb∶YAG laser experimental setup[41]
Fig. 16. Experimental results. Autocorrelation trajectories and corresponding spectra of pulses generated through (a) CPA and (b) SSA[41]
Fig. 17. Schematic diagram of CPA system device[42]
Fig. 18. Experimental results. (a) Solid line is the output pulse autocorrelation curve, dotted line is Fourier pulse width spectrum limit; (b) spectra of input and output[42]
Fig. 19. DPA schematic diagram[43]
Fig. 20. DPA experimental device diagram based on birefringent crystal[44]
Fig. 21. FOM diagram of PCMA-DPA compression pulses based on different YVO4 or α-BBO numbers (inset: number of 64 pulse autocorrelation curves)[46]
Fig. 22. Coherent pulse superposition amplification system[47]
Fig. 23. XCAN structure diagram[48]
Fig. 24. Experimental results. (a) Normalized spectra of single channel and 61 combined beams; (b) autocorrelation curves of compressed output combined beams[48]
Fig. 25. Experimental setup and results. (a) Colour scanning electron microscope images of the SiN optical micro-resonator; (b) autocorrelation curve of soliton pulse[51]
Fig. 26. Experimental results. (a) Pressure-dependent output spectra of 6 m long HCF; (b) autocorrelation curves of different HCF lengths (inset: pump pulse spectra) [52]
Fig. 27. Experimental device diagram of ytterbium doped fiber chirped pulse amplifier [53]
Fig. 28. Experimental results. (a) Measured and (b) simulated trajectories;(c) spectrum in linear and logarithmic coordinates (inset); (d) pulse images with a pulse width of 10 fs (red) and 8.3 fs (black) (inset :an output spot image)[53]
Fig. 29. Diagram of experimental apparatus of single crystal fiber power amplifier and structure diagram of double ended pump amplifier. (a) Diagrams of experimental installations; (b) structural drawings[55]
Fig. 30. Experimental results. (a) Average field intensity (blue) in VECSEL’s gain quantum well is normalized to the incident field intensity and measured spectrum (red); (b) 107 fs pulse compressed to 96 fs autocorrelation trace[59]
Fig. 31. Experimental device diagram of ultrafast semiconductor laser[60]
Fig. 32. Normalized spectra and autocorrelation curves. (a) Normalized spectrum of signal amplified by fiber amplifier; (b) autocorrelation trajectory of compression pulse (blue), and 120 fs hyperbolic secant pulse (red)[60]
Fig. 33. Experimental setup of Kerr lens mode-locked Yb∶LuAG ceramic laser[62]
Fig. 34. Experimental results. (a) Second harmonic (SHG) autocorrelation trajectory, experimental data (circle), and fitting curve (solid line) of 91 fs pulse with an average power of 1.64 W; (b) laser spectrum of 91 fs pulse; (c) SHG autocorrelation trajectory from -40 ps to 40 ps[62]
Fig. 35. Schematic diagram of ultrafast fiber laser[63]
Fig. 36. Properties characterization of output laser. (a) Output spectra with (red solid line) and without (blue dotted line) deburring; (b) interference autocorrelation with (red) and without (blue) deburring[63]
Fig. 37. Experimental setup and output laser characterization of the two-stage system. (a) Schematic diagram of the experimental apparatus; (b) autocorrelation curves at repetition frequencies of 1, 4.8, and 9.6 MHz [64]
Fig. 38. Cavity diagram of mode-locked Yb∶CALGO oscillator[65]
Fig. 39. Yb∶CALGO oscillator output laser characterization.(a) Output spectra of linear and logarithmic measurements in the range from 970 nm to 1370 nm; (b) measured interferometric autocorrelation curves[65]
Fig. 40. Pulse autocorrelation curve and spectrum under space-time mode-locking. (a) Autocorrelation curve; (b) spectrum [69]
Fig. 41. Chirality controllable femtosecond LG01 vortices. (a) Experimental installations; (b) ultrafast vortex beam spot; (c) measured spectrum; (d) autocorrelation pulse trace[70]
Fig. 42. Femtosecond vortex laser. (a) Mirror photogrephs with defective points; (b) spot of the annular beam; (c) laser emission spectrum; (d) measured autocorrelation trace [71]
Fig. 43. FROG results of pulse measurement after neural network compression[75]
Fig. 44. Experimental apparatus and pulse detection results[76]
Fig. 45. Comparison of pulse width of measured and predicted autocorrelation functions (inset: predicted accuracy)[76]
Fig. 46. Optimized result. (a) Optical spectra before and after optical power enhancement ; (b) autocorrelation traces of the chirped and dechirped pulses[77]
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