THz generation by photomixing of integrated glass DFB lasers

Friday,  March 24, 2023 at 1pm
 

LesTerahertz applications have been extensively studied during the last decade since they allow both increasing the bandwidth of telecom systems and the detection of many organic molecules in solid and liquid phase, but also hazardous materials such as explosives. In this contribution, we present a device that allows generating frequencies in the terahertz domain through the heterodyning of signals emitted by two distributed feedback lasers made by ion exchange on a Erbium-Ytterbium co-doped glass. Thanks to the intrinsic thermal stability of the glass substrate, the slow dynamic of the amplifier medium and since the laser pairs are integrated on a single chip and identically pumped by the same sources, stable frequencies have been generated in the millimeter and sub-Terhertz frequency range, without requiring the implementation of thermal or electrical control or feedback loop.