Microwave-Band Chirped Pulse Amplification Technique Based on a System of Helically Corrugated Waveguides

We consider the possible implementation of the Chirped Pulse Amplification (CPA) technique, widely used in optics, for the microwave frequency band. We propose using helically-corrugated waveguides for pulse stretching and compressing as their dispersion properties strongly depend on geometrical parameters. For stretched pulse amplification, a helical-waveguide gyro-TWT can be used as a broadband amplifier. Simulations with parameters of the experimentally realized 30 GHz gyro-TWT show that for a 300 W, 200 ps incident pulse, amplification up to 4 MW (40 dB) can be achieved in this system, while in the linear regime of the same gyro-TWT the output power is only about 250 kW.