Photon Orbital Angular Momentum Measurement System and Method Based on Wavefront Conversion Method

A technology of orbital angular momentum and measurement system, which is applied in the field of single photon detection, can solve problems such as large error, detection error, and exponential increase in cascading difficulty, and achieve a large degree of freedom of operation, enhanced imaging effect, and strong repeatability Effect
CN106289526BActive Publication Date: 2017-11-17黑龙江省工研院资产经营管理有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
黑龙江省工研院资产经营管理有限公司
Publication Date
2017-11-17

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Abstract

The invention discloses a photon orbit angular momentum measurement system and a method based on a wave-front conversion method, which belong to the technical field of single photon detection in a quantum technology, solve the problem that the existing photon-magnitude orbit angular momentum detection needs multiple interferometers to be cascaded, and can simply, conveniently and accurately measure the photon-magnitude orbit angular momentum. Transmitted laser signals are modulated through multiple times of a spatial light modulator and a Fourier transformation system; the modulated signal pulses with the orbit angular momentum are gathered to a CCD detection array; and the quantum number in the orbit angular momentum in the signals can be distinguished through a pattern position on the detector, different azimuth angles are corresponding to different lateral coordinates, and the quantum number 1 in the orbit angular momentum can be determined as coordinates are measured. The system and the method of the invention are applied to measurement on the quantum number in the single-photon magnitude orbit angular momentum.
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Description

technical field

[0001] The invention relates to a photon orbital angular momentum measurement system and method, and relates to the technical field of single photon detection in quantum technology. Background technique

[0002] Photon orbital angular momentum can load infinite multi-dimensional information, and it is a good carrier of information in the fields of communication and detection. Sometimes the echo signal is very weak, and there is currently a lack of detection methods for photon-level orbital angular momentum. The traditional intensity interference method is not suitable for the measurement of orbital angular momentum of weak signals at the photon level. The traditional interferometer cascade detection method, for the case of many types of orbital angular momentum, the difficulty of cascading increases exponentially, and a large number of analysis Beamers will cause detection errors due to instrument imperfections and transmission losses, and the more types, the...

Claims

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