Partially coherent light beam generation method, measurement method and device of vector special correlation

Abstract

The disclosure provides a vector-specific correlation partially coherent beam generation method, measurement method and device, including expanding and collimating the generated laser beam, and splitting the expanded and collimated laser beam into two beams with different orthogonal components The beams are loaded with special coherent structures respectively; the two beams loaded with special coherent structures are strictly superimposed to obtain vectorially coherent beams; the vectorially coherent beams are split to obtain reference beams and signal beams respectively light; the signal light is incident on a rotating ground glass plate to obtain completely incoherent light; the completely incoherent light is filtered and shaped to obtain a partially coherent light beam with special vector correlation; at the same time, based on the photoelectric coupling period, the mixed light beam is The real part and the imaginary part of the structure function of the vector partial coherent beam are obtained from the intensity gray level distribution diagram of a receiving device, and the measurement of the vector partial coherent beam is realized.

Description

technical field [0001] The present disclosure belongs to the field of laser technology, and in particular, relates to a method for generating a partially coherent beam with special vector correlation, a method for measuring and a device. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Partially coherent beams, as an important complement to fully coherent beams, have the advantage of alleviating the random fluctuations of the beams, which coincides with the requirement of beam stability in free-space communications. Over the years, research on partially coherent light has shown that it can reduce beam speckle compared to fully coherent light, reduce beam scintillation in linear random media (such as atmospheric turbulence), spot drift, and improve imaging resolution in the imaging field, etc. advantage. In addition, the specially correla...

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Problems solved by technology

However, these two methods have disadvantages such as low efficiency, large loss, and complicated operation. Therefore, it is necessary to find an effective and simple method for measuring the correlation structure of partially coherent beams with special correlation of vectors.

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