| Citation: | GUO Ya-jun, WANG Jian-ji. Generation of a high spectral power supercontinuum covering the ultraviolet to infrared by a femtosecond laser multi-filament array in fused silica[J]. Chinese Optics. doi: 10.37188/CO.EN-2026-0005
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Supercontinuum (SC) generated from femtosecond laser filamentation has found extensive applications due to its broadband spectral properties. In this study, we present a novel method to simultaneously improve the spectral coverage and power density of SC. This is realized by combining two-color femtosecond laser injection and multi-filament array arrangement in fused silica. With this method, high spectral power SC is obtained. The spectral power density is above 0.1 mW/nm over a broad wavelength range from approximately 380 nm to 950 nm. We find that both the spectral range and power density of SC are affected by the input power and the intensity ratio between the fundamental and second-harmonic laser pulses. In addition, the spectral fluctuation of the generated SC is measured to be less than 4% within 6 minutes. These results offer a feasible and effective way to enhance the spectral power and coverage of SC sources. They are of great importance for promoting the practical applications of SC.
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