Abstract:Frequency-swept interferometry (FSI) is a powerful ranging method with high precision and immunity to ambient light. However, the stand-off distance of the current FSI-based ranging system for non-cooperative targets is relatively short, because the weak echo power cannot provide the needed signal-to-noise ratio (SNR). Here, we report a ranging method combining FSI and the laser feedback technique. Compared with the conventional FSI, the interference between the weak echo signal and the local oscillator occurs… Show more
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