Segmented Mach-Zehnder Modulator for Orthogonal Sampling Based High Bandwidth THz Transmitters

We present the concept for a compact, integrated, photonics-assisted digital-to-analog converter and optical modulator in one single device. The system takes advantage of two ideas namely: A segmented Mach-Zehnder modulator (MZM), and orthogonal sampling. The presented and simulated proof-of-concept device with three segments has a bandwidth of 15 GHz and a sampling rate of 30 GSs. No pulse source is required as it is generated from a single radio frequency oscillator and a properly biased segmented modulator. The system can enable the generation and modulation of high-bandwidth signals within the Terahertz range.