  Optical Coherence Tomography (OCT) is a key 3D imaging technology that
provides micron scale depth resolution for bio-imaging. This resolution
substantially surpasses what it typically achieved in Light Detection and
Ranging (LiDAR) which is often limited to the millimetre scale due to the
impulse response of the detection electronics. However, the lack of coherence
in LiDAR scenes, arising from mechanical motion for example, make OCT
practically infeasible. Here we present a quantum interference inspired
approach to LiDAR which achieves OCT depth resolutions without the need for
high levels of stability. We demonstrate depth imaging capabilities with an
effective impulse response of 70 {\mu}m, thereby allowing ranging and multiple
reflections to be discerned with much higher resolution than conventional LiDAR
approaches. This enhanced resolution opens up avenues for LiDAR in 3D facial
recognition, and small feature detection/tracking as well as enhancing the
capabilities of more complex time-of-flight methods such as imaging through
obscurants and non-line-of-sight imaging.
