Chinese Optics Letters, 2017, 15 (2): 021401, Published Online: Jul. 26, 2018
Propagation of a filamentary femtosecond laser beam with high intensities at an air-solid interface Download: 797次
140.3440 Laser-induced breakdown 100.6640 Superresolution 210.4770 Optical recording 180.1790 Confocal microscopy
Abstract
The propagation of a filamentary laser beam at an air-glass surface is studied by setting the incident angle satisfying the total reflection condition. The images of the trajectory of the filamentary laser beam inside the sample and the output far-field spatial profiles are measured with varying incident laser pulse energies. Different from the general total reflection, a transmitted laser beam is detected along the propagation direction of the incident laser beam. The energy ratio of the transmitted laser beam depends on the pulse energies of the incident laser beam. The background energy reservoir surrounding the filament core can break the law of total reflection at the air-glass surface, resulting in the regeneration of the transmitted laser beam.
Zuoye Liu, Yanghua Zhang, Jingjie Ding, Shaohua Sun, Bitao Hu. Propagation of a filamentary femtosecond laser beam with high intensities at an air-solid interface[J]. Chinese Optics Letters, 2017, 15(2): 021401.