Compact 15 mJ Fiber–Solid Hybrid Hundred-Picosecond Laser Source for Laser Ablation on Copper

Wang, Tingting; Wang, Jing; Zhao, Meng; Peng, Hao; Zhou, Jianwei; Qu, Guannan; Tan, Yidong; Cai, Hongxing

doi:10.3390/app12199621

Cited by 1 publication

(1 citation statement)

References 42 publications

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“…Currently, there have been many research reports on self-phase modulation effects in picosecond pulse amplifiers at home and abroad. In 2012, S I. Kablukov et al analyzed the changes in the output pectrum using the model theory of self phase modulation in Yb doped fiber lasers [9]; In 2020, Qiao Lu et al proposed an interstage notch filtering scheme based on fiber Bragg gratings, which improved spectral splitting caused by self phase modulation [10]; In 2022, Tingting Wang et al utilized the effect fiber Bragg gratings and the dispersion characteristics of single mode fiber stretchers to effectively suppress spectrum broadening caused by self-phase modulation effects [11]. However, from the direction of injected optical power, there are few experimental studies on the spectral morphology of output pulses.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on spectral morphological changes of narrow pulse width picosecond lasers

Wang,

Zhao,

Liu

et al. 2023

3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023)

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Using ytterbium doped single-clad/double-clad fiber amplifiers, different amplification experiments were conducted on narrow pulse width picosecond light, and the influence of self-phase modulation on pulse frequency domain characteristics during amplification was analyzed. A self developed picosecond oscillator based on semiconductor saturable absorber mirror (SESAM) mode locking is used to directly enter the main amplifier device. The oscillator has a pulse width of 6.8 ps, a repetition rate of 20.76 MHz, and a center wavelength of 1064.3 nm. After amplification, the maximum output power is 315 mW, with an energy of about 15 nJ. The phenomenon of spectral changes caused by selfphase modulation of picosecond pulsed light during amplification is explored. When the output pulse optical power is about 200 mW and the pulse energy is about 10 nJ, and the injection power is 39.4 mW, 134 mW, 229.2 mW, and 326.8 mW, respectively, the corresponding spectral widths are 0.187 nm, 0.522 nm, 0.53 nm, and 0.588 nm, respectively. Experimental research shows that under the same output pulse energy conditions, the smaller the injected optical power, the better the output pulse spectral morphology. As the injected optical power decreases, the effect of pulse shape on self-phase modulation in fiber lasers decreases.

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Section: Introductionmentioning

confidence: 99%