Temperature field and influence analysis of magneto-optical modulation system

Wei Cai; Youan Xu; Zhiyong Yang

doi:10.1117/12.2533776

17 May 2019 Temperature field and influence analysis of magneto-optical modulation system

Wei Cai, Youan Xu, Zhiyong Yang

Author Affiliations +

Proceedings Volume 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019); 111702Y (2019) https://doi.org/10.1117/12.2533776
Event: Fourteenth National Conference on Laser Technology and Optoelectronics, 2019, Shanghai, China

Abstract

In the actual operation of the magneto-optical modulation system based on the Faraday effect, the internal temperature change will cause the drift of the Faraday rotation angle signal, which is a key problem that further improves the accuracy of the system. In this paper, the system heat transfer model is constructed by in-depth analysis of the system heat generation mechanism. Then the finite element simulation software is used to establish the equilibrium process of the system temperature field, and the internal temperature change of the magneto-optical material is analyzed. Finally, the typical paramagnetic material TGG is taken as an example. Analyze the effect of temperature changes on the Faraday rotation angle and the accuracy of the magneto-optical modulation system. The results show that with the increase of working time, the internal temperature of the system gradually increases, causing the attenuation of the magnetic field amplitude and the decrease of the Verdet constant of the magneto-optical material. Both of them work together on the solution of the Faraday rotation angle, which ultimately affects the overall accuracy of the magnetooptical modulation system.

Citation Download Citation

Wei Cai, Youan Xu, and Zhiyong Yang "Temperature field and influence analysis of magneto-optical modulation system", Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 111702Y (17 May 2019); https://doi.org/10.1117/12.2533776

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