In this paper, we will demonstrate a photonics-based 300 GHz THz wireless communication with our new-type dual-mode laser(DML) beating light source which is directly modulated at a rate of more than10 Gbps. Also, we verified that using of the DML is superior in terms of stability and linewidth than other technique of photomixing using a two distributed-feedback(DFB) LDs.
The properties of terahertz (THz) radiation make it possible to inspect a variety of non-conductive materials, such as paper, plastic, cloth, etc., without causing damage to the human body. THz wave characteristics have been used in numerous studies on application systems for non-destructive and manufacturing process monitoring as a result.
In this presentation, we introduce how to set up a contactless thickness monitoring system with long-term signal stabilization of CW THz signals to achieve signal stabilization within 1% for 12 hours insensitive to changes in ambient temperature.
This conference presentation, “Waveguide packaged UTC-PD module for terahertz applications” was presented at the Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XV conference at SPIE Photonics West 2022.
In this work, we reported the 1.55 ㎛ ridge-type dual mode laser(R-DML) as a THz communication beating source. It have many advantages of cost effects, compactness and simplification of fabrication by introducing the ridge-type waveguides. We have demonstrated 10Gbps THz wireless communications with 10-3 BER (bit-error-rate) without digital signal processing.