UTC-PD-Based Tx for Communications and Advanced Measurements

This chapter is summarizing a set of recent progress on uni-traveling carrier photodiode (UTC-PD)-based THz emitters and their application to THz communications: signal generation, 100 Gbit/s in the 300 GHz range using a linear UTC-PD, antenna testing with modulated data signals, and Tx/Rx system using a UTC-PD as Tx, coupled with III-V based GaAs receivers. Then, recent examples of testing devices based on photonics techniques are given, leveraging the photonics-based approach. In particular, the testing of non-linear behavior of active THz devices (like amplifiers) is presented, for intermodulation measurements and datacom testing of a set of passive devices as flexible waveguides.