Characterization of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow><mml:mi>Er</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:mo>:</mml:mo><mml:mi>YV</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math> for microwave to optical transduction

Rare-earth-ion doped crystals are a promising platform for applications in microwave-to-optical transduction. Erbium is of special interest because its telecom wavelength optical transitions. This work investigates the and electron-spin properties Er${}^{3+}$:YVO${}_{4}$. An initial transduction classical microwave signal using this material demonstrated. The measured strong dipole moment narrow ensemble inhomogeneities make Er${}^{3+}$:YVO${}_{4}$