Investigating the Influence of Laser Polarization on Filamentation Thresholds in Transparent Media via Supercontinuum Coherence
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 proc...
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MDPI AG
2025-04-01
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| Online Access: | https://www.mdpi.com/1424-8220/25/7/2285 |
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| author | Yun Zhang Yu Xia Canneng Liang Yuyao Xiong Jingyuan Zhang Shuang Lin Suyu Li Mingxing Jin |
| author_facet | Yun Zhang Yu Xia Canneng Liang Yuyao Xiong Jingyuan Zhang Shuang Lin Suyu Li Mingxing Jin |
| author_sort | Yun Zhang |
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| description | 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, <i>P</i><sub>th</sub>, 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 <i>P</i><sub>th</sub> values also increase. The <i>P</i><sub>th</sub> of the CP pulses is consistently higher than that of LP pulses. The experimental measurements of <i>P</i><sub>th</sub> for femtosecond lasers with different polarization states provide basic data support for the research on nonlinear characteristics. |
| format | Article |
| id | doaj-art-fd76f9601e4c47b981a1e5873c577949 |
| institution | DOAJ |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-fd76f9601e4c47b981a1e5873c5779492025-08-20T03:03:27ZengMDPI AGSensors1424-82202025-04-01257228510.3390/s25072285Investigating the Influence of Laser Polarization on Filamentation Thresholds in Transparent Media via Supercontinuum CoherenceYun Zhang0Yu Xia1Canneng Liang2Yuyao Xiong3Jingyuan Zhang4Shuang Lin5Suyu Li6Mingxing Jin7Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, ChinaInstitute of Atomic and Molecular Physics, Jilin University, Changchun 130012, ChinaInstitute of Atomic and Molecular Physics, Jilin University, Changchun 130012, ChinaInstitute of Atomic and Molecular Physics, Jilin University, Changchun 130012, ChinaInstitute of Atomic and Molecular Physics, Jilin University, Changchun 130012, ChinaCollege of Science, Shenyang University of Chemical Technology, Shenyang 110142, ChinaInstitute of Atomic and Molecular Physics, Jilin University, Changchun 130012, ChinaInstitute of Atomic and Molecular Physics, Jilin University, Changchun 130012, ChinaIn 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, <i>P</i><sub>th</sub>, 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 <i>P</i><sub>th</sub> values also increase. The <i>P</i><sub>th</sub> of the CP pulses is consistently higher than that of LP pulses. The experimental measurements of <i>P</i><sub>th</sub> for femtosecond lasers with different polarization states provide basic data support for the research on nonlinear characteristics.https://www.mdpi.com/1424-8220/25/7/2285supercontinuum coherencepolarizationfemtosecond filamentationfilamentation threshold |
| spellingShingle | Yun Zhang Yu Xia Canneng Liang Yuyao Xiong Jingyuan Zhang Shuang Lin Suyu Li Mingxing Jin Investigating the Influence of Laser Polarization on Filamentation Thresholds in Transparent Media via Supercontinuum Coherence Sensors supercontinuum coherence polarization femtosecond filamentation filamentation threshold |
| title | Investigating the Influence of Laser Polarization on Filamentation Thresholds in Transparent Media via Supercontinuum Coherence |
| title_full | Investigating the Influence of Laser Polarization on Filamentation Thresholds in Transparent Media via Supercontinuum Coherence |
| title_fullStr | Investigating the Influence of Laser Polarization on Filamentation Thresholds in Transparent Media via Supercontinuum Coherence |
| title_full_unstemmed | Investigating the Influence of Laser Polarization on Filamentation Thresholds in Transparent Media via Supercontinuum Coherence |
| title_short | Investigating the Influence of Laser Polarization on Filamentation Thresholds in Transparent Media via Supercontinuum Coherence |
| title_sort | investigating the influence of laser polarization on filamentation thresholds in transparent media via supercontinuum coherence |
| topic | supercontinuum coherence polarization femtosecond filamentation filamentation threshold |
| url | https://www.mdpi.com/1424-8220/25/7/2285 |
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