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Fig. 6 | PhotoniX

Fig. 6

From: Frequency-swept feedback interferometry for noncooperative-target ranging with a stand-off distance of several hundred meters

Fig. 6

SNR and detection limits of the system. a The normalized power spectra versus the beat frequency fb. b The SNR with and without PD noise. c The SNR versus various feedback power attenuations. The red solid line is the linear fitting result. The black dash-dotted line is when the SNR = 1. d The ranging results with a 460 m stand-off distance

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