Generation of a Long Linearly Chirped Microwave Waveform Based on a Fourier Domain Mode-Locked Optoelectronic Oscillator Incorporating a Frequency Shifting Loop

Generation of a Long Linearly Chirped Microwave Waveform Based on a Fourier Domain Mode-Locked Optoelectronic Oscillator Incorporating a Frequency Shifting Loop

clockVolume: 72, Issue: 3, March 2024

authorZhenzhao Yi

Generation of a Long Linearly Chirped Microwave Waveform Based on a Fourier Domain Mode-Locked Optoelectronic Oscillator Incorporating a Frequency Shifting Loop

Abstract
DOI: 10.1109/TMTT.2023.3308193   IEEEXplore: https://ieeexplore.ieee.org/document/10242121
Device
Fourier domain mode-locked (FDML) optoelectronic oscillator (OEO) with a recirculating frequency shifting loop (FSL) to generate a broadband linearly chirped microwave waveform (LCMW) with a long pulsewidth.
Spectrum
8–12 GHz (LCMW); 1548.16–1550.06 nm (LD)
Novelty
The large time bandwidth product (TBWP) is achieved with a recirculating FSL in the OEO loop to increase the effective loop length of the FDML-OEO.
Application
Radar systems with a large pulse compression ratio.
Performance
202.67 µs increased pulsewidth from a 1.6 km FDML-OEO when light in a 3.2 km FSL circulates 12 times.