Abstract
A photonic method to generate a dual-chirp microwave waveform (DCMW) is proposed and demonstrated by utilizing a stimulated Brillouin scattering based optoelectronic oscillator and a frequency scanning laser source (FSLS). There are no radio frequency sources or Mach–Zehnder modulators in the proposed structure, which makes the system simple and stable. In the experiment, an alternative scheme is utilized to replace the FSLS, and the DCMW signal with a central frequency of 4.69 GHz is generated; the bandwidth of the generated DCMW signal is up to 7 GHz and the chirp rate up to ${\pm}5.3\;{\rm GHz}/\unicode{x00B5} {\rm s}$. The autocorrelation and ambiguity function of the generated signal are also investigated and show good performance of pulse compression and reduction of range-Doppler coupling.
© 2021 Optical Society of America
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