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High power supercontinuum generation by dual-color femtosecond laser pulses in fused silica
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作者 saba zafar Dong-Wei Li +2 位作者 Acner Camino Jun-Wei Chang Zuo-Qiang Hao 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第8期436-439,共4页
High power supercontinuum(SC) is generated by focusing 800 nm and 400 nm femtosecond laser pulses in fused silica with a microlens array. It is found that the spectrum of the SC is getting broader compared with the ca... High power supercontinuum(SC) is generated by focusing 800 nm and 400 nm femtosecond laser pulses in fused silica with a microlens array. It is found that the spectrum of the SC is getting broader compared with the case of a single laser pulse, and the spectral energy density between the two fundamental laser wavelengths is getting significantly higher by optimizing the phase matching angle of the BBO. It exceeds μJ/nm over 490 nm range which is from 380 nm to 870 nm,overcoming the disadvantage of relative lower power in the ranges far from the fundamental wavelength. 展开更多
关键词 FILAMENTATION supercontinuum generation microlens array
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Intense supercontinuum generation in the near-ultraviolet range from a 400-nm femtosecond laser filament array in fused silica
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作者 李东伟 张兰芝 +5 位作者 saba zafar 宋鹤 郝作强 奚婷婷 高勋 林景全 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第7期149-152,共4页
An intense supercontinuum(SC) in the near-ultraviolet range is generated from filamentation by focusing a 400-nm laser into fused silica with a microlens array(MLA). The spectrum of the SC is shown to be sensitive... An intense supercontinuum(SC) in the near-ultraviolet range is generated from filamentation by focusing a 400-nm laser into fused silica with a microlens array(MLA). The spectrum of the SC is shown to be sensitive to the distance between the MLA and fused silica. In our optimal conditions, the near-ultraviolet SC can cover a range of 350-600 nm,where a bandwidth of approximately 55 nm above the 1μJ/nm spectral energy density and 20 nm bandwidth with tens ofμJ/nm are achieved. In addition, the energy conversion efficiency of the 400 nm laser for SC generation is further analyzed.A maximum conversion efficiency of 66% is obtained when the entrance face of fused silica is set around the focus of the MLA. 展开更多
关键词 FILAMENTATION supercontinuum generation microlens array fused silica
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