A mixed light encoding method and device

Abstract

The invention belongs to the technical field of optical communication, and specifically provides a hybrid optical encoding method and device. The method comprises the following steps: 1) modulating and encoding a laser pulse signal in a pulse amplitude modulation and encoding PAM mode; 2) modulating and encoding control information in a pulse position modulation PPM mode; 3) mixing the laser pulse signal with the control information through a laser wave mixer; 4) transmitting a hybrid signal of the laser pulse signal and the control information to a laser phased array through an optical fiber link; 5) separating out the laser pulse signal and the control information by an amplitude comparator according to different amplitudes; and 6) controlling a phase adjustment unit array of the laser phased array through the control information, and controlling the emission direction of the laser pulse. According to the hybrid optical encoding method and device provided by the invention, the hybrid optical encoding method is adopted to not only ensure the high-power pulse laser signals of the transmitting end, and fully use the time intervals between the laser pulses to improve the alignment precision of antenna arrays.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to a hybrid optical encoding method and device. Background technique [0002] In recent years, due to the advantages of large capacity, electromagnetic compatibility, good confidentiality, and high flexibility, laser communication has overcome the shortcomings of optical fiber communication in flexibility on the one hand, and solved the shortcomings of radio communication in capacity on the other hand Most people value. [0003] For a laser communication system, the function of the transmitter is to modulate various forms of information generated by the source onto the optical carrier, and transmit it through the atmosphere or free space. In laser communication, there are problems such as large attenuation, large path loss, and the transmitting antenna is easily affected by atmospheric fluctuations or atmospheric turbulence during signal transmission. [...

AI Technical Summary

Problems solved by technology

[0005] In traditional mobile laser communication, data information and control information are separated from each other and transmitted separately. Usually, laser pulse signals are used to transmit data information, and control information is used to control the precise alignment of the optical transmitting antenna. Therefore, at the transmitting end, it is necessary Two sets of different devices realize the transmission of data information and control information respectively, such two sets of devices will not only increase the complexity of the system, but also increase the cost

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