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Optical quantum technologies such as quantum sensing, quantum cryptographyand quantum computation all utilize properties of non-classical light, such asprecise photon-number and entangled photon-pair states, to surpass technologiesbased on the classical light. A common route for obtaining heralded singlephotons is spontaneous four-wave mixing in optical fibers, allowing for awell-defined spatial mode, for high efficiency integration into optical fibernetworks. These fibers are typically pumped using large, commercial, pulsedlasers requiring high-power (~10 W) pump lasers and are limited to ~MHzrepetition rate. Here we propose a cost-efficient, compact and mobilealternative. Photon pairs at 660 nm and 960 nm will be created using four-wavemixing in commercial birefringent optical fiber, pumped using transform limitedpicosecond pulses with GHz repetition rates derived from a 785 nm CW laserdiode using cavity-enhanced optical frequency comb generation. The pulses arepredicted to have average power of 275 mW, a peak power of >40 W, and predictedphoton yield of >2000 pairs detected per second. This design will be laterutilized to implement a quantum illumination scheme based on a coincidencecount between idler and signal photons - instead of joint measurement betweensignal and idler. This will allow for quantum advantage over classic LIDARwithout the requirement for maintaining an interferometric stability in freespace.

A practical compact source of heralded single photons for simple detection LIDAR