Photonic Integrated Circuit Comprising Mode-Locked Laser and Pulse Interleaver for Wavelength Tunable THz Signal Generation

We report a photonic chip comprising multiple colliding pulse mode-locked laser and delay line-assisted Mach-Zehnder interleaver to generate 350GHz wave signal. With this mode-locked laser fourth harmonics are obtained. The interleaver quadruples the repetition rate. An integrated phase modulator enables wavelength tuning up to 0.03nm.This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 642355 and Spanish Ministerio de Economia y Competitividad DiDACTIC project (TEC2013-47753-C3-3-R). The authors would like to thank SMART Photonics for the chip fabrication