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physics.optics2026
Shaping the spectra of second harmonic laser by spatial focusing
Yan-Ming Liu, Tao Xie, Xiangying Hao +1
Accurately controlling the spectral width of second harmonic generation (SHG) is critical in applications such as nonlinear microscopy, ultrafast spectroscopy, and quantum optics,…
physics.optics2026
Thermal stable nonlinear Raman-Nath diffraction and Cherenkov radiation in PPKTP crystals
Tao Xie, YangMing Liu, WenXin Zhu +2
Nonlinear Raman-Nath diffraction (NRND) and nonlinear Cherenkov radiation (NCR) are significant nonlinear diffraction phenomena in optics. Previous studies have primarily focused o…
physics.optics2025★ 4 cited
Machine learning identification of fractional-order vortex beam diffraction process
Yan Guo, Heng Lyu, Chunling Ding +2
Fractional-order vortex beams possess fractional orbital angular momentum (FOAM) modes, which theoretically have the potential to increase transmission capacity infinitely. Therefo…