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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

All solid-state high power microwave source with high repetition frequency.

J-W B Bragg¹, W W Sullivan, D Mauch

¹Department of Electrical and Computer Engineering, Center for Pulsed Power and Power Electronics, Texas Tech University, Lubbock, Texas 79409, USA.

The Review of Scientific Instruments

|June 8, 2013

Summary

This summary is machine-generated.

A novel solid-state, megawatt-class high power microwave system utilizes silicon carbide photoconductive semiconductor switches and nonlinear transmission lines. This system generates high-frequency microwave pulses with fast risetimes for advanced applications.

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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

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Area of Science:

Electrical Engineering
Materials Science
Microwave Engineering

Background:

High power microwave (HPM) systems are crucial for various applications.
Solid-state switches offer advantages over traditional vacuum devices.
Developing compact, efficient HPM sources remains a challenge.

Purpose of the Study:

To present an all solid-state, megawatt-class HPM system.
To demonstrate the integration of silicon carbide photoconductive semiconductor switches (PCSS) and nonlinear transmission lines (NLTL).
To characterize the system's performance in terms of pulse generation and microwave output.

Main Methods:

Utilized a 4H-SiC PCSS hard-switched by a 355 nm laser pulse train.
Employed a fiber optic system for optical pulse delivery at 65 MHz repetition frequency.
Fed the generated electrical pulses into a ferrimagnetic-based coaxial NLTL.

Main Results:

Achieved electrical pulses with 7 ns FWHM and 2 ns risetimes from the SiC PCSS.
Generated microwave pulses with a base frequency of 2.1 GHz at 65 MHz pulse repetition frequency (PRF).
Observed sharpened output risetimes of 120 ps and microwave oscillations at 2-4 GHz from the NLTL.

Conclusions:

The integrated SiC PCSS and NLTL system successfully generated megawatt-class HPM pulses.
Demonstrated MHz-PRF burst-mode operation and frequency agility.
The solid-state approach offers a promising alternative for future HPM systems.