Yusuke MORI,¹ Takatomo SASAKI,¹ Takahiro OBANA,¹ Masashi YOSHIMURA,¹ Norio OHNISHI² and Tsuguo FUKUDA³

¹Department of Electrical Engineering, Faculty of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka, 565 Japan ²Electrotechnical Laboratory, Ministry of International Trade and Industry, 1-1-4, Umezono, Tsukuba, Ibaraki, 305 Japan ³Institute for Material Research, Tohoku University, 2-1-1, Katahira, Aoba, Sendai, Miyagi, 980 Japan

(Accepted October 12, 1994)

Potassium lithium niobate (KLN) fiber crystals have been grown by μ-pulling down method. The KLN fibers doubled around 806 nm radiation for type I noncritical phase matching at room temperature. We observed ~0.6 mW output power from single-pass second harmonic generation at an input power of 700 mW.

Key words : KLN, fiber, SHG, μ-PD method, compact blue laser