A pulsed optoelectronic microwave source with high power and frequency tunability.

Area of Science:

• Optoelectronics
• Semiconductor devices
• Microwave engineering

Background:

• Conventional electronic microwave sources face limitations in balancing output power and tunability.
• Optoelectronic methods present a viable alternative by integrating optical bandwidth with semiconductor power capabilities.

Purpose of the Study:

• To demonstrate a novel optoelectronic microwave source utilizing silicon carbide.
• To achieve picosecond-scale control over photogenerated carrier lifetime for high-power microwave generation.

Main Methods:

• Employed fast-response silicon carbide (SiC) for optoelectronic microwave generation.
• Utilized picosecond-scale control of photogenerated carrier lifetime.
• Achieved power handling up to 55 MW.

Main Results:

• Generated continuously tunable pulsed microwave emission in the P-L band (0.25–1.3 GHz).
• Delivered peak output power exceeding 1 MW with stable nanosecond-scale pulse operation.
• Demonstrated low timing jitter and efficient power combining in array configurations.

Conclusions:

• The developed optoelectronic source offers a scalable solution for high-power, broadband, and flexible microwave generation.
• This technology enables precise control over microwave frequency, energy, and spatial distribution.
• Potential applications span radar, directed energy, and medical technologies.