A femtosecond laser-induced crystallization of Fresnoite crystal (Sr₂TiSi₂O₈) from a glass of composition 40SrO–20TiO₂–40SiO₂, with the following parameters: 1.5 µJ/pulse; 1030nm; 350kHz; 10µm/s, 0.6NA; 300 fs; focal depth = 150 µm. Laser polarization is parallel to the writing direction. This was obtained by one of my former Ph.D. students, Xuan He.

—Bertrand Poumellec, ICMMO/UPSaclay

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