A kind of lcos phase calibration method and equipment

Abstract

An LCoS phase calibration method and device. The method comprises: loading the same greyscale value on each pixel point of an LCoS, acquiring phase modulation amounts respectively corresponding to different greyscale values loaded multiple times so as to obtain an initial response relationship, and obtaining, in combination with a target response relationship, an initial greyscale value correlation; determining, according to a pre-set greyscale value range corresponding to the target response relationship, K input greyscale values corresponding to a phase modulation amount change period K, and determining, according to the initial greyscale value correlation, K output greyscales corresponding to the K input greyscale values; respectively loading corresponding output greyscale values on K pixel points corresponding to the phase modulation amount change period K to obtain actual phase modulation depth values, and determining, in combination with a target phase modulation depth value corresponding to the target response relationship, corrected phase modulation depth values and a corrected target response relationship; and obtaining, according to the initial response relationship and the corrected target response relationship, a greyscale value correlation corresponding to the phase modulation amount change period K.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to an LCoS phase calibration method and equipment. Background technique [0002] LCoS (Liquid Crystal on Silicon, liquid crystal on silicon), as a spatial intensity modulator, was mainly used in the field of image display in the early days, for image processing, display, coding, etc. With the expansion of LCoS research, LCoS has been gradually applied in the field of optical communication as a spatial phase modulator in recent years. [0003] Calibrating the phase of the LCoS by means of a LUT (Look Up Table, look-up table) is a commonly known technology in the industry at present, but there is a certain phase error in the existing method. [0004] The following are two schemes for compensating the phase error proposed in the prior art: [0005] Solution 1: In view of the phase error caused by the uneven thickness of LCoS, divide the LCoS into multiple region...

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Problems solved by technology

[0011] The embodiment of the present invention provides an LCoS phase calibration method and equipment to solve the problem of large phase error caused by a short period of change of the phase adjustment amount

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