Chinese Optics Letters, Vol. 17, Issue 12, 123201 (2019)
Intensity modulation of filaments by shaped laser pulses in fused silica
Junwei Chang1, Ruihan Zhu1, Tingting Xi2,*, Mengning Xu2, Di Wang1, Lanzhi Zhang3, Dongwei Li1,3, and Zuoqiang Hao1,3,**
- 1School of Science, Changchun University of Science and Technology, Changchun 130022, China
- 2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- 3Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
We show the intensity control of filamentation in fused silica by temporally shaping the femtosecond laser pulse. The arbitrary control of filamentation intensity has been obtained by the feedback control based on the genetic algorithm, and the peak intensity of filament has changed from about 670 to around 2100 (charge-coupled device counts). This modulation is in qualitative agreement with the simulation results. It is shown that the control of the intensity is realized by modulating the peak power of the shaped pulse.