be balanced. The detection section consists of two photo-detectors (the probe detector and reference detector) that can resolve the correlated degree of freedoms of the probe and reference light. The presence or absence of the target object could be determined by analyzing the correlation between the collected light and the reference light since only probe light that is reflected by the target object could be correlated with the reference light. The *correlation enhancement* of the target detection performance is most pronounced in a noisy environment: the strong correlation between the probe and reference light can help to easily distinguish the reflected probe light from the noise background. The measurement of the correlation only requires independent and separate measurements of the probe and reference light. Therefore the non-classical entanglement between them is not directly observed. However, the correlation enhancement of the target detection performance can still be considered as a quantum benefit because the correlation strength between the probe and reference light can exceed the classical limit[@Lopaeva:2013; @england2019quantum]. For comparison, the current state-of-the-art in LIDAR simply transmits photons towards the target and observes the reflection. In other words, no correlation of any kind is used. This classical protocol will be referred 