Quantum imaging system for quantum radar

Abstract

The invention provides a quantum imaging system for a quantum radar. The quantum imaging system comprises a transmitting end, a receiving end and a quantum imaging unit; the transmitting unit comprises a pulse laser, an intensity modulator, a phase encoder and an adjustable attenuator which are orderly connected with each other; the receiving end comprises a phase decoder and two single photon detector which are respectively connected with the phase decoder; and the quantum imaging unit comprises a first optical fiber coupler, a projecting lens, a digital micro-mirror device, a collecting lensand a second optical fiber coupler. Compared with the prior art, the system of the invention adopts a decoy state of light pulses to carry out an imaging process, so that the anti-interference capability can be effectively improved, and target object imaging is prevented from being falsified and tampered; the system adopts a phase coding scheme, and has higher stability than a polarization codingscheme; and meanwhile, the imaging efficiency is improved, and the imaging time is shortened, so that a safer bit error rate threshold is obtained, and the anti-interference capability is effectivelyimproved.

Description

technical field [0001] The invention relates to the technical field of quantum polarization encoding, in particular to a quantum imaging system for quantum radar. Background technique [0002] With the development of quantum information technology, it has become the trend of today's technology to use the principle of quantum mechanics to solve the security problems existing in the classical application field. For example, in the military field, the application of quantum imaging technology to radar detection, the so-called quantum radar, greatly improves the detection concealment and resolution, and has extremely high application value. When applying quantum imaging technology to the radar field, it may still face potential threats of jamming and spoofing. This is because when the existing radar faces a target with active jamming capability, its detection signal will be intercepted by the target object or a third party and at the same time transmit a jamming signal with the...

AI Technical Summary

Problems solved by technology

The traditional quantum imaging technology needs to divide the light source into two beams and detect the coincidence count between the two beams, the imaging efficiency is low and the speed is slow

Polarization encoding, however, means that the polarization state of photons transmitted in space will be affected by atmospheric disturbances, and will change significantly when scattered on the surface of the target object, which greatly reduces the stability of the system.

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