Bi-terminal bidirectional distant transmission simulation of satellite laser communication and gourd detection apparatus

Abstract

Disclosed is a bidirectional long distance transmission simulation for two terminals in a laser satellite communication system and the ground testing device thereof. The device uses space dual channel structure to realize the independent positive and reverse direction bidirectional transmission of a laser beam, uses Fourier lens with long focal length to realize the optic Fourier far field transformation, uses a 4-f optic imaging amplifier with multi-level concatenated center sampling to simulate the long distance transmission of the optic field, and uses a scanning two-facet reflective mirror to realize the principle of reverse scanning with the same angle of the dual channels in the optic path to simulate the relative motion between satellites. The bidirectional long distance transmission simulation for two terminals in a laser satellite communication system of the invention can realize the laser beam transformation from the near field distribution to the far field distribution at the space scale of laboratory and can simulate the relative far field motion of two laser communication terminals being tested at the same time. The bidirectional long distance transmission simulation for two terminals in a laser satellite communication system and the ground testing device of the invention are mainly used in the bidirectional aiming, capture and tracking of two satellite laser communication terminals and in the ground testing and validating of the communication performance.

Description

technical field The invention relates to satellite laser communication, in particular to a dual-terminal two-way long-distance transmission simulation and ground detection device for satellite laser communication, which is mainly used for aiming, capturing and tracking of satellite laser communication terminals and detection and verification of communication performance. Background technique Satellite laser communication includes free space laser communication between satellites, between satellites and other flying objects, between satellites and the ground, etc. In order to maintain a stable communication link between two relatively moving laser communication terminals, a laser communication terminal must include two subsystems: laser communication and optical capture and aiming. Since the range of satellite laser communication is hundreds to tens of thousands of kilometers, it is impossible to directly complete the performance detection and verification of the laser commun...

AI Technical Summary

Problems solved by technology

The collimator is used to emit a wavefront for testing the laser communication terminal under test or to receive the emitted beam of the laser communication terminal under test (see: [1] B.Lauren and G.Planche, "Silex overview after flight terminals campaign," Proc. SPIE, Vol.2990, pp.10-22, 1997), this scheme can test a laser communication terminal alone, but it cannot directly implement the detection and verification of the tracking and communication performance of the two tested laser communication terminals

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