Optical detection of femtosecond laser pulses in a ferromagnet as a result of its magnetization by the magnetic field of the laser pulse

A. H. Makaryan; V. R. Tadevosyan; A. S. Nikoghosyan; T. S. Yezekyan; M. A. Kazaryan

doi:10.1117/12.2548981

11 December 2019 Optical detection of femtosecond laser pulses in a ferromagnet as a result of its magnetization by the magnetic field of the laser pulse

A. H. Makaryan, V. R. Tadevosyan, A. S. Nikoghosyan, T. S. Yezekyan, M. A. Kazaryan

Author Affiliations +

Proceedings Volume 11322, XIV International Conference on Pulsed Lasers and Laser Applications; 113222E (2019) https://doi.org/10.1117/12.2548981
Event: XIV International Conference on Pulsed Lasers and Laser Applications (AMPL-2019), 2019, Tomsk, Russian Federation

Abstract

An experimental investigation of the detection of optical laser radiation in a magnetized transparent ferromagnet, at room temperature was made. As a source of electromagnetic radiation in the optical region we used Spectra-Physics Mai-Tai femtosecond laser with a wavelength tuning range from 710 nm to 950 nm. The laser radiation was linearly polarized, and the peak power was about 300 kW. For the detection of laser pulses a monocrystalline ferromagnet YIG was used, which is partially transparent in the laser tuning region. It is established that the detection is due to the nonlinearity of the static magnetization curve. To determine the dependence of the degree of correlation between the magnetization curve and the amplitude of the detected signal, on the external magnetic field, the detection process was modeled in Matlab. The comparison shows that the results of measurements and simulations correlate well with each other, and the magnitude and sign of the detected signal correspond to the curves of static magnetization.

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A. H. Makaryan, V. R. Tadevosyan, A. S. Nikoghosyan, T. S. Yezekyan, and M. A. Kazaryan "Optical detection of femtosecond laser pulses in a ferromagnet as a result of its magnetization by the magnetic field of the laser pulse", Proc. SPIE 11322, XIV International Conference on Pulsed Lasers and Laser Applications, 113222E (11 December 2019); https://doi.org/10.1117/12.2548981

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