Total Performance of Magneto-Optical Ceramics with a Bixbyite Structure
High-quality magneto-optical ceramics (Tb<i><sub>x</sub></i>Y<sub>1−<i>x</i></sub>)<sub>2</sub>O<sub>3</sub> (<i>x</i> = 0.5⁻1.0) with a Bixbyite structure were extensively investigated for the fi...
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doaj-45073d6d563c4a11912e87a2ff4320f82020-11-25T01:06:05ZengMDPI AGMaterials1996-19442019-01-0112342110.3390/ma12030421ma12030421Total Performance of Magneto-Optical Ceramics with a Bixbyite StructureAkio Ikesue0Yan Lin Aung1Shinji Makikawa2Akira Yahagi3World-Lab. Co., Ltd., Mutsuno, Atsutaku, Nagoya 456-0023, JapanWorld-Lab. Co., Ltd., Mutsuno, Atsutaku, Nagoya 456-0023, JapanShin-Etsu Chemical Co., Ltd., Advanced Functional Materials Research Center, Matsuida, Annaka, Gunma 379-0224, JapanShin-Etsu Chemical Co., Ltd., Advanced Functional Materials Research Center, Matsuida, Annaka, Gunma 379-0224, JapanHigh-quality magneto-optical ceramics (Tb<i><sub>x</sub></i>Y<sub>1−<i>x</i></sub>)<sub>2</sub>O<sub>3</sub> (<i>x</i> = 0.5⁻1.0) with a Bixbyite structure were extensively investigated for the first time. The total performances of these ceramics were far superior to those of commercial TGG (Tb<sub>3</sub>Ga<sub>5</sub>O<sub>12</sub>) crystal, which is regarded as the highest class of Faraday rotator material. In particular, the Verdet constant of Tb<sub>2</sub>O<sub>3</sub> (when <i>x</i> = 1.0) ceramic was the largest—495 to 154 rad·T<sup>−1</sup>·m<sup>−1</sup> in the wavelength range of 633 to 1064 nm, respectively. It was possible to further minimize the Faraday isolator device. The insertion loss of this ceramic was equivalent to that of the commercial TGG single crystal (0.04 dB), and its extinction ratio reached more than 42 dB, which is higher than the value for TGG crystal (35 dB). The thermal lens effect (1/f) was as small as 0.40 m<sup>−1</sup> as measured by a 50 W fiber laser. The laser damage threshold of this ceramic was 18 J/cm<sup>2</sup>, which is 1.8 times larger than that of TGG, and it was not damaged during a power handling test using a pulsed laser (pulse width 50 ps, power density 78 MW/cm<sup>2</sup>) irradiated at 2 MHz for 7000 h.https://www.mdpi.com/1996-1944/12/3/421faraday rotator materialoptical isolatortransparent ceramics |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Akio Ikesue Yan Lin Aung Shinji Makikawa Akira Yahagi |
spellingShingle |
Akio Ikesue Yan Lin Aung Shinji Makikawa Akira Yahagi Total Performance of Magneto-Optical Ceramics with a Bixbyite Structure Materials faraday rotator material optical isolator transparent ceramics |
author_facet |
Akio Ikesue Yan Lin Aung Shinji Makikawa Akira Yahagi |
author_sort |
Akio Ikesue |
title |
Total Performance of Magneto-Optical Ceramics with a Bixbyite Structure |
title_short |
Total Performance of Magneto-Optical Ceramics with a Bixbyite Structure |
title_full |
Total Performance of Magneto-Optical Ceramics with a Bixbyite Structure |
title_fullStr |
Total Performance of Magneto-Optical Ceramics with a Bixbyite Structure |
title_full_unstemmed |
Total Performance of Magneto-Optical Ceramics with a Bixbyite Structure |
title_sort |
total performance of magneto-optical ceramics with a bixbyite structure |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-01-01 |
description |
High-quality magneto-optical ceramics (Tb<i><sub>x</sub></i>Y<sub>1−<i>x</i></sub>)<sub>2</sub>O<sub>3</sub> (<i>x</i> = 0.5⁻1.0) with a Bixbyite structure were extensively investigated for the first time. The total performances of these ceramics were far superior to those of commercial TGG (Tb<sub>3</sub>Ga<sub>5</sub>O<sub>12</sub>) crystal, which is regarded as the highest class of Faraday rotator material. In particular, the Verdet constant of Tb<sub>2</sub>O<sub>3</sub> (when <i>x</i> = 1.0) ceramic was the largest—495 to 154 rad·T<sup>−1</sup>·m<sup>−1</sup> in the wavelength range of 633 to 1064 nm, respectively. It was possible to further minimize the Faraday isolator device. The insertion loss of this ceramic was equivalent to that of the commercial TGG single crystal (0.04 dB), and its extinction ratio reached more than 42 dB, which is higher than the value for TGG crystal (35 dB). The thermal lens effect (1/f) was as small as 0.40 m<sup>−1</sup> as measured by a 50 W fiber laser. The laser damage threshold of this ceramic was 18 J/cm<sup>2</sup>, which is 1.8 times larger than that of TGG, and it was not damaged during a power handling test using a pulsed laser (pulse width 50 ps, power density 78 MW/cm<sup>2</sup>) irradiated at 2 MHz for 7000 h. |
topic |
faraday rotator material optical isolator transparent ceramics |
url |
https://www.mdpi.com/1996-1944/12/3/421 |
work_keys_str_mv |
AT akioikesue totalperformanceofmagnetoopticalceramicswithabixbyitestructure AT yanlinaung totalperformanceofmagnetoopticalceramicswithabixbyitestructure AT shinjimakikawa totalperformanceofmagnetoopticalceramicswithabixbyitestructure AT akirayahagi totalperformanceofmagnetoopticalceramicswithabixbyitestructure |
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