| Citation: | NIU Hong-kun, ZHANG Jing, FU Xiu-hua, MA Guo-shui, JIN Hai-jun, YANG Fei. Development of phase delay mirrors for femtosecond laser systems[J]. Chinese Optics, 2024, 17(6): 1442-1449. doi: 10.37188/CO.2024-0015
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Phase delay mirrors were designed and prepared to regulate femtosecond laser systems’ group-delay dispersion (GDD). This paper systematically investigates the principle of compensating group-delay dispersion by phase-delay mirrors. Nb2O5 and SiO2 were used as the materials with high and low refractive indices. The group-delay dispersion curves were smoothed out by pairing the phase-delay mirrors with their complementary mirrors. The phase-delayed mirrors with phase modulation data of −800 GDD were prepared, and the reflectivity reached more than 99% in the range of 900 nm−
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