[8p-Z16-1~19] 3.14 Optical control devices and optical fibers

△ [8p-Z16-1] MgO:SLT Quasi-Phase-Matched Annealed Proton-Exchanged Waveguides for High Power Second Harmonic Generation

〇Ryosuke Noro¹, Masahiro Uemukai¹, Tomoyuki Tanikawa¹, Ryuji Katayama¹ (1.Osaka Univ.)

Keywords:ferroelectrics, wavelength conversion, waveguide

Recently, a 1 W class ultroviolet laser for application for a laser direct drawing system has been required, and third harmonic wave with a wavelength of 350 nm such as a YAG laser is considered to use. MdO:SLT is an attractive material for the above application, and by increasing the guided-mode size to about 30 um, strong excitation in the 10 W class is possible, and high power output can be expected. In this work, a quasi-phase-matched second harmonic generation device in a MgO:SLT annealed proton-exchanged waveguide with a large guided mode was fabricated.