CC BY
17LS-PS-2
Verdet constant of rare-earth-sesquioxide-based magneto-active ceramics
D. Vojna1,2, O. Slezak1, R. Yasuhara3, H. Furuse4, A. Lucianetti1, T. Mocek1
1HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, Dolni Brezany, Czech
Republic
2Faculty of Nuclear Sciences and Physical Engineering- Czech Technical University in Prague, Department of Physical Electronics, Prague, Czech Republic 3National Institute for Fusion Science- National Institutes of Natural Sciences, High-Temperature Plasma Physics Research Division, Toki, Japan
4Kitami Institute of Technology, Department of Material Science and Engineering, Kitami, Japan
Faraday devices (FDs) represent one of the fundamental components used in laser systems, for instance, in the multi-pass amplification schemes, regenerative amplifiers or for optical isolation of unwanted back-reflections from one part of the laser system to another. An indispensable part of these devices is a piece of magneto-active material, in which the Faraday rotation is induced by applying the magnetic field.
Most recently, a lot of scientific attention is dedicated to the investigation of rare-earth sesquioxides (RE2O3, RE - Tb [1-3], Dy [4,5], and Ho [6,7]) ceramics materials. The reason is that these compounds contain a high concentration of magnetically active RE3+ ions and, hence, it is possible to reduce the length of the needed magneto-optical elements in the FDs. Such a reduction is extremely beneficial for mitigation of the thermal effects arising in the high-power FDs. We report on comprehensive experimental characterization of the Verdet constant of Dy-based and Ho-based RE-sesquioxide ceramics samples in a broad spectral range from 0.6 to 2.3 p,m. These results are valuable for a proper design of 1 - 2 p,m high-power FDs.
References
[1] I. L. Snetkov et al., Wavelength dependence of Verdet constant of Tb3+:Y2O3 ceramics, Appl. Phys. Lett. 108, 161905 (2016).
[2] A. Ikesue et al., Polycrystalline (TbxYi-x)2O3 Faraday rotator, Opt. Lett. 42, 4399-4401, (2017).
[3] A. Ikesue et al., Total Performance of Magneto-Optical Ceramics with a Bixbyite Structure, Materials 12(3), 421, (2019).
[4] J. R. Morales et al., Magneto-optical Faraday effect in nanocrystalline oxides, J. Appl. Phys. 109(9), 093110, (2011).
[5] I. L. Snetkov et al., Magneto-optical Faraday effect in dysprosium oxide (Dy2O3) based ceramics obtained by vacuum sintering, Opt. Lett. 43(16), 4041-4044 (2018).
[6] H. Furuse et al., Magneto-optical characteristics of holmium oxide (Ho2O3) ceramics, Opt. Mater. Express 7, 827-833, (2017).
[7] D. Vojna et al., Faraday effect measurements of holmium oxide (Ho2O3) ceramics-based magneto-optical materials, High Power Laser Science and Engineering 6, (2018).
