Coupling of sub-terawatt laser into hollow core waveguide for high-harmonic generation above 200 eV
Hollow core waveguides are widely used in extreme field research to guide laser pulses. The laser peak intensity is usually several orders higher than the damage threshold of waveguide cladding material in these applications. The nonlinear drift of the spatial focus of such high power laser with the...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/161057 |
| _version_ | 1811695190267658240 |
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| author | Ran, Qiandong Wang, Lifeng Li, Lu Li, Hao Wang, Qi Jie Zhang, Ying |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Ran, Qiandong Wang, Lifeng Li, Lu Li, Hao Wang, Qi Jie Zhang, Ying |
| author_sort | Ran, Qiandong |
| collection | NTU |
| description | Hollow core waveguides are widely used in extreme field research to guide laser pulses. The laser peak intensity is usually several orders higher than the damage threshold of waveguide cladding material in these applications. The nonlinear drift of the spatial focus of such high power laser with the power or intensity fluctuation can easily destroy the waveguide in an avalanche manner. In this letter, we experimentally investigate the nonlinear drift of focal position and size of a sub-terawatt laser beam with respect to pulse energy and pulse duration. A theoretical model is derived and qualitatively explains the experimental observations. A reliable procedure to couple 3 mJ laser pulses at 27 fs into a hollow core waveguide with 150 μm bore diameter is developed. When the waveguide is filled with Helium, the high harmonics up to 212 eV are generated which confirms that the intense laser pulses with peak intensity of 1.8 × 10 15 W/cm 2 are successfully coupled into the waveguide. |
| first_indexed | 2024-10-01T07:19:32Z |
| format | Journal Article |
| id | ntu-10356/161057 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:19:32Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1610572022-08-12T08:24:54Z Coupling of sub-terawatt laser into hollow core waveguide for high-harmonic generation above 200 eV Ran, Qiandong Wang, Lifeng Li, Lu Li, Hao Wang, Qi Jie Zhang, Ying School of Electrical and Electronic Engineering Singapore Institute of Manufacturing Technology Engineering::Electrical and electronic engineering Extreme Field Hollow Core Waveguide Hollow core waveguides are widely used in extreme field research to guide laser pulses. The laser peak intensity is usually several orders higher than the damage threshold of waveguide cladding material in these applications. The nonlinear drift of the spatial focus of such high power laser with the power or intensity fluctuation can easily destroy the waveguide in an avalanche manner. In this letter, we experimentally investigate the nonlinear drift of focal position and size of a sub-terawatt laser beam with respect to pulse energy and pulse duration. A theoretical model is derived and qualitatively explains the experimental observations. A reliable procedure to couple 3 mJ laser pulses at 27 fs into a hollow core waveguide with 150 μm bore diameter is developed. When the waveguide is filled with Helium, the high harmonics up to 212 eV are generated which confirms that the intense laser pulses with peak intensity of 1.8 × 10 15 W/cm 2 are successfully coupled into the waveguide. Agency for Science, Technology and Research (A*STAR) This work was supported by the A∗STAR Science and Engineering Research Council (SERC) through the X-Ray Photonics Program under Grant 1426500049 and Grant A1890b0049. 2022-08-12T08:24:54Z 2022-08-12T08:24:54Z 2020 Journal Article Ran, Q., Wang, L., Li, L., Li, H., Wang, Q. J. & Zhang, Y. (2020). Coupling of sub-terawatt laser into hollow core waveguide for high-harmonic generation above 200 eV. IEEE Photonics Technology Letters, 32(21), 1393-1396. https://dx.doi.org/10.1109/LPT.2020.3026713 1041-1135 https://hdl.handle.net/10356/161057 10.1109/LPT.2020.3026713 2-s2.0-85092728455 21 32 1393 1396 en 1426500049 A1890b0049 IEEE Photonics Technology Letters © 2020 IEEE. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Extreme Field Hollow Core Waveguide Ran, Qiandong Wang, Lifeng Li, Lu Li, Hao Wang, Qi Jie Zhang, Ying Coupling of sub-terawatt laser into hollow core waveguide for high-harmonic generation above 200 eV |
| title | Coupling of sub-terawatt laser into hollow core waveguide for high-harmonic generation above 200 eV |
| title_full | Coupling of sub-terawatt laser into hollow core waveguide for high-harmonic generation above 200 eV |
| title_fullStr | Coupling of sub-terawatt laser into hollow core waveguide for high-harmonic generation above 200 eV |
| title_full_unstemmed | Coupling of sub-terawatt laser into hollow core waveguide for high-harmonic generation above 200 eV |
| title_short | Coupling of sub-terawatt laser into hollow core waveguide for high-harmonic generation above 200 eV |
| title_sort | coupling of sub terawatt laser into hollow core waveguide for high harmonic generation above 200 ev |
| topic | Engineering::Electrical and electronic engineering Extreme Field Hollow Core Waveguide |
| url | https://hdl.handle.net/10356/161057 |
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