Investigating the Influence of Laser Polarization on Filamentation Thresholds in Transparent Media via Supercontinuum Coherence
Year: 2025
Type: article
Abstract: In this work, we experimentally investigate the characteristics of supercontinuum (SC) generation induced by femtosecond laser pulses with different polarization states in transparent medium. We employ a Mach–Zehnder Interferometer (MZI) to capture interference patterns during the filamentation process. The relative filamentation threshold, Pth, is measured for femtosecond laser pulses with different polarization states. The results demonstrate that the intensity of SC is strongly correlated with the polarization state of the incident laser pulses. At the same pulse energy, circularly polarized (CP) pulses suppress SC generation compared to linearly polarized (LP) pulses. Compared with weak external focusing, short-focal-length focusing significantly broadens the spectral range of SC. As the focal length of the focusing lens increases, the measured Pth values also increase. The Pth of the CP pulses is consistently higher than that of LP pulses. The experimental measurements of Pth for femtosecond lasers with different polarization states provide basic data support for the research on nonlinear characteristics.
Source: Sensors
DOI: 10.3390/s25072285
Authors: Yun Zhang, Yu Xia, Canneng Liang, Yuyao Xiong, Jingyuan Zhang, Shuang Lin, Suyu Li, Mingxing Jin
Institutions: Jilin University, Shenyang University of Chemical Technology
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
OpenAlex ID: W4409173000