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Laser ceramic materials for subpicosecond solid-state lasers using Nd$$^{3+}$$ -doped mixed scandium garnets

Okada, Hajime; Tanaka, Momoko; Kiriyama, Hiromitsu; Nakai, Yoshiki*; Ochi, Yoshihiro; Sugiyama, Akira; Daido, Hiroyuki; Kimura, Toyoaki*; Yanagitani, Takagimi*; Yagi, Hideki*; Meichin, Noriyuki*

We have successfully developed and demonstrated broadband emission Nd-doped mixed scandium garnets based on laser ceramic technology. The inhomogeneous broadening of Nd$$^{3+}$$ fluorescence lines results in a bandwidth above 5 nm that is significantly broader than that for Nd:YAG and enables subpicosecond mode-locked pulse durations. We have also found the emission cross-section of 7.8$$times$$10$$^{-20}$$ cm$$^{2}$$ to be adequate for efficient energy extraction and thermal conductivity of 4.7 W/mK from these new Nd-doped laser ceramics. The new laser ceramics are good candidates for laser host material in diode-pumped subpicosecond laser system with high efficiency and high repetition rate.



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