The generation of the high-carrier-frequency linearly frequency-modulated waveforms based on the single optial frequency comb
Year: 2026
Type: conference-paper
Abstract: High-carrier-frequency linearly frequency-modulated (HCF-LFM) signals feature more accurate detection performance and are widely applied in both military battlefields and civilian fields. Based on the above, this thesis focuses on the generation of HCF-LFM signals. First, an optical frequency comb is generated by an external modulator to provide multi-channel local oscillator sources for frequency conversion. Subsequently, the optical signal is split into upper and lower branches and one optically injected semiconductor laser is used as a channelized filter. The upper branch acts as the optical frequency-converted signal, which the baseband LFM radar signal is electro-optically loaded via carrier-suppressed single-sideband modulation, while the lower branch outputs different optical oscillation signal by changing its oscillating frequency under free-running state. Thus, arbitrary frequency conversion of the baseband radar signal to different high-carrier frequency can be realized through a photodetector. This scheme fully exploits the superiority of semiconductor lasers in realizing flexible channelized filtering. Simulation results verify that the proposed scheme successfully achieves frequency conversion of 0–6 GHz LFM signals across the 54–60 GHz frequency range, exhibiting excellent waveform reconstruction flexibility. It provides a potential technical approach for the low-cost generation of HCF-LFM radar signals
Institution: PLA Army Engineering University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7203835451