Pure phase object imaging system based on photon orbit angular momentum
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A technology of orbital angular momentum and imaging system, applied in the field of quantum information, can solve problems such as the difficulty of imaging pure phase objects
Active Publication Date: 2017-08-04
黑龙江省工研院资产经营管理有限公司
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[0003] The present invention is to solve the problem that the existing imaging system is difficult to image a phase-only object, and the present invention provides a phase-only object imaging system based on photon orbital angular momentum
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specific Embodiment approach 1
[0021] Specific implementation mode one: see figure 1 Describe this embodiment mode, a kind of phase-only object imaging system based on photon orbital angular momentum described in this embodiment mode, it comprises laser 1, BBO crystal 2, two lenses 10, two filters 3, spiral phase plate 4, A spatial light modulator 5, two single photon detectors 6, two data acquisition cards 7, an associated measurement circuit 8 and a control terminal 9;
[0022] After the light emitted by the laser 1 passes through the BBO crystal 2, a photon pair entangled with the orbital angular momentum of the photon of equal magnitude and opposite sign is generated.
[0023] Wherein, a beam of photons in the photon pair is used as signal light after being concentrated by a lens 10, filtered by a filter 3, and incident to the spatial light modulator 5,
[0024] The spatial light modulator 5 forms a phase hologram according to the phase control signal sent by the control terminal 9, so that the signal ...
specific Embodiment approach 2
[0037] Specific implementation mode two: see figure 1 This embodiment is described. The difference between this embodiment and the phase-only object imaging system based on photon orbital angular momentum described in Embodiment 1 is that the spatial light modulator 5 is a transmissive phase-type spatial light modulator.
specific Embodiment approach 3
[0038] Specific implementation mode three: see figure 1 Describe this embodiment, the difference between this embodiment and the phase-only object imaging system based on photon orbital angular momentum described in the first embodiment is that the signal light transmitted by the spatial light modulator 5 is Gaussian light, The phase-converted idler light is Gaussian light.
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Abstract
Provided is a pure phase object imaging system based on photon orbit angular momentum, belonging to the technical field of quantum information and solving the problem of difficult imaging of pure phase objects in a conventional imaging system. The pure phase object imaging system includes a laser, a BBO crystal, two lenses, two filters, a spiral phase plate, a spatial light modulator, two single photon detectors, two data acquisition cards, an associated measurement circuit and a control terminal. The system analyzes the imaging process of the pure phase object on the basis of the photon orbit angular momentum entangled state, divides the generated entangled photon pair into two paths, places an all-phase object in one path which is the signal optical path and the other is an idle optical path, and can recover the intelligible image of the pure phase object by means of the correlation algorithm by recording the correlation count of the two optical paths. The system is suitable to be applied to the non-localized pure phase object imaging in the military, medical, astronomy and search and rescue fields.
Description
technical field [0001] The invention belongs to the technical field of quantum information. Background technique [0002] Traditional optical imaging technology obtains the image information of the target by recording the light intensity distribution of the radiation field, so the imaging is related to the amplitude change. For phase targets and objects, classical detection methods cannot be used for imaging, so a system that can realize pure phase object imaging is urgently needed. Contents of the invention [0003] The purpose of the invention is to solve the problem that the existing imaging system is difficult to image a phase-only object, and the invention provides a phase-only object imaging system based on photon orbital angular momentum. [0004] A phase-only object imaging system based on photon orbital angular momentum, which includes a laser, a BBO crystal, two lenses, two filters, a spiral phase plate, a spatial light modulator, two single-photon detectors, an...
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