[15a-213-1~12] 3.5 Laser system and materials

△ [15a-213-12] Characterization of Laser Emission at 2.8 μm of Er-doped Lu₂O₃ Ceramics

〇Hiyori Uehara², Ryo Yasuhara¹, Shigeki Tokita², Masanao Murakami³, Seiji Shimizu³ (1.National Institute for Fusion Science, 2.ILE, Osaka Univ., 3.Mitsuboshi Diamond Industrial Co., Ltd.)

Keywords:mid-IR lasers, ceramic lasers, rare-earth sesquioxides

We have successfully demonstrated pulsed and CW operations of Er:Lu₂O₃ ceramic laser at around 2.8 μm wavelength with output peak power of >1 W at room temperature. The slope efficiencies of 15% and 17% were performed in pulsed and CW operation, respectively. To our knowledge, this is the highest value obtained by a Er:Lu₂O₃ ceramic laser. To achieve efficient lasing, we also have investigated the dynamics of lasing wavelengths and the lasing characteristics at various pulsed conditions.