Presentation Information
[10p-E202-11]Growth and Optical Characterization of REF3 (RE = Tb, Dy, Ho) –AEF2 (AE = Ca, Sr) Single Crystals
〇(M1)Satoshi Yamashita1,2, Rikito Murakami3, Masao Yoshino2, Kei Kamada3,4, Kyoung Jin KIM3,4, Masahito Ichinohe4, Nobuhiko Sarukura5, Noriko Chikumoto5, Toshihiko Shimizu5, Yugo Akabe5, Satoshi Ishizawa2, Yuui Yokota6, Akira Yoshikawa2,3,4 (1.Grad. Sch. Eng., Tohoku Univ., 2.IMR Tohoku Univ., 3.NICHe Tohoku Univ., 4.C&A corporation, 5.ILE, Osaka Univ., 6.Kyushu Univ.)
Keywords:
Faraday rotator material,Rare-earth fluoride
This study focuses on the growth and optical characterization of taisonite-type rare-earth fluoride single crystals as candidate Faraday rotator materials for optical isolators. Optical isolators are important in high-power laser and optical communication systems because they suppress feedback light that can destabilize oscillation or damage light sources. Since their performance strongly depends on the magneto-optical properties and optical loss of the Faraday rotator material, fluoride single crystals containing rare-earth ions are promising candidates. In this work, single crystals composed of rare-earth fluorides containing Tb, Dy, or Ho and alkaline-earth fluorides such as CaF2 or SrF2 were grown by the micro-pulling-down method. The obtained crystals were processed into samples and evaluated by powder X-ray diffraction, X-ray rocking curve measurements, and optical transmittance measurements. The Tb-Ca-based crystal was obtained without cracks, confirmed to be a single phase, and showed favorable optical transparency. Detailed comparisons among the different rare-earth and alkaline-earth compositions will be presented in the talk.