Expanded Gain-Switched Comb Source for 180 - 260 GHz Sub-THz Analog Radio-over-Fiber 6G Wireless System

We demonstrate the successful generation and transmission of low-subcarrier spacing (up to 500 kHz) 6G compatible sub-THz OFDM signals in the 180 to 260 GHz frequency band using an expanded gain-switched laser comb source and waveguide-integrated photodiode antenna.