Polarization-selective magneto-optical modulation

We study magneto-optical coupling in a ferrimagnetic sphere resonator made of yttrium iron garnet. We find that the resonator can be operated in the telecom band as a polarization-selective optical modulator. The input state of polarization (SOP) contributing to the Stokes sideband is orthogonal to the one contributing to the anti-Stokes sideband. In the region of single sideband modulation, the SOP of both sidebands is nearly orthogonal to the SOP of the incident light. Intermodulation gain can be employed in the nonlinear regime for amplification. (C) 2022 Author(s).

Automated summary

The study demonstrates how a ferrimagnetic sphere resonator made of yttrium iron garnet can function as a polarization-selective optical modulator in the telecom band. It shows that the input state of polarization contributing to each sideband is orthogonal, leading to nearly orthogonal polarizations between the sidebands and incident light in single sideband modulation. Additionally, it suggests utilizing intermodulation gain in the nonlinear regime for amplification.