Applying external electrical field on crysta gain media for laser parameters control

摘要

The polarization of a laser crystal by an external electrical field generates new possibilities for the wide control of laser parameters, and can expand applications for existing lasers and also create a new line of the laser devices. The direct impact of external electrical fields on the laser solid state gain media was previously estimated using as an example a Ti:Sapphire (Ti:Sa) crystal. It was demonstrated that the metal-ligands distances displacement in this crystal under the external electrical field is comparable to distortions caused by a mechanical pressure of 150 kbar, measured in early experiments. In this letter, the experimental results of the electrical field impact on (Ti:Sa) crystal optical parameters are reported. These experiments demonstrate a reduction in the luminescence spectral amplitude and an increase in bandwidth with the red-shift of the maximal amplitude after high voltage application.