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K: Fachverband Kurzzeit- und angewandte Laserphysik

K 3: Laser Systems I

K 3.5: Vortrag

Dienstag, 19. März 2019, 15:20–15:40, HS 3

Growth and characterization of Er³⁺-doped sesquioxide crystals for 3 µm lasers — •Anastasia Uvarova, Christo Guguschev, and Christian Kränkel — Zentrum für Lasermaterialien, Leibniz-Institut für Kristallzüchtung, Berlin, Germany

Lasers in the wavelength range of 3 µm are attractive in fields like laser surgery or atmospheric detection. Er³⁺-doped sesquioxide crystals have been shown to be very suitable laser materials for this purpose. However, the melting points of these materials in excess of 2400 ^∘C make the growth of these materials very challenging. Here, we report on our recent efforts to utilize the optical floating zone method (OFZ) for the growth of sesquioxide crystals to avoid the use of expensive and sensitive crucible materials. Undoped and Er³⁺-sesquioxide crystals with diameters up to 5 mm and cm-lengths were grown in a high temperature OFZ furnace under Ar-atmosphere at elevated pressure.