Data transmission under high scattering based on OAM-basis transmission matrix

Multiplexing of orbital angular momentum (OAM) channels is an important method to increase the optical communication capacity at present, but the multiple scattering and distortion of long-distance optical communication greatly limit its application. Here, a data transmission method based on an OAM-basis transmission matrix (TM) under high scattering is proposed. In this method, OAM modes are directly encoded by the OAM-basis TM, and the incident power spectral distribution of OAM modes can be directly acquired by the intensity profile of the speckle field on the camera. This method can realize the multiplexing of a large number of OAM channels and is easy to perform. Experimentally, we have achieved a maximum of 800 OAM modes multiplexed, and a bit error rate of 0.01% in the data transmission of color images.