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Entanglement and correlation of quantum light can enhance LiDAR sensitivityin the presence of strong background noise. However, the power of such quantumsources is fundamentally limited to a stream of single photons and cannotcompete with the detection range of high-power classical LiDAR transmitters. Tocircumvent this, we develop and demonstrate a quantum-inspired LiDAR prototypebased on coherent measurement of classical time-frequency correlations. Thissystem uses a high-power classical source and maintains the high noiserejection advantage of quantum LiDARs. In particular, we show that it canachieve over 100dB rejection (with 100ms integration time) ofindistinguishable(with statistically identical properties in every degrees offreedom) in-band noise while still being sensitive to single photon signals. Inaddition to the LiDAR demonstration, we also discuss the potential of theproposed LiDAR receiver for quantum information applications. In particular, wepropose the chaotic quantum frequency conversion technique for coherentmanipulation of high dimensional quantum states of light. It is shown that thistechnique can provide improved performance in terms of selectivity andefficiency as compared to pulse-based quantum frequency conversion.

Compact All-Fiber Quantum-Inspired LiDAR with > 100dB Noise Rejection and Single Photon Sensitivity