Weak light signal simulation system under strong background radiation in laser communication

Abstract

The invention provides a weak light signal simulation system under strong background radiation in laser communication, and solves the problem that simulation fails due to annihilation of weak light signals caused by a simulation environment due to relatively high simulation magnitude of the weak light signals under the strong background radiation in the prior art. The system comprises a box body, a light trap arranged outside the box body, a background light source arranged in the box body, a first collimating mirror, a signal laser, an optical fiber attenuator, a collimating mirror group and a semi-transparent and semi-reflecting mirror, the inner wall of the box body is coated with extinction paint; the optical fiber attenuator and the collimating lens group are arranged on an emergent light path of the signal laser, the maximum attenuation ratio of the optical fiber attenuator is less than or equal to 1: 10 <-6 >, and the optical energy loss of the collimating lens group is 7%-30%; the first collimating mirror is located on an emergent light path of the background light source; the semi-transparent and semi-reflective mirror is located on emergent light paths of the collimating lens group and the first collimating lens, transmits light to the emergent light path of the collimating lens group and reflects the emergent light path of the first collimating lens; and the light trap is positioned on an emergent light path of the first collimating mirror and is used for absorbing background light transmitted by the reflecting surface of the semi-transparent and semi-reflecting mirror and residual scattered light on the inner wall of the box body.

Description

technical field [0001] The invention belongs to the field of stray light suppression and space laser communication, in particular to a weak light signal simulation system under strong background radiation in laser communication, which is used for the simulation of weak signals under complex environmental background (strong radiation). Background technique [0002] In the field of aviation and aerospace, with the development of high-sensitivity and low-threshold detectors, there are higher requirements for the imaging of space targets and the stray light suppression ability of detection systems. The target for tracking imaging and detection in spaceflight is a space-based target. The space background in which it is located is relatively complex and varied. There are strong radiation sources outside the field of view of various camera systems, and the working environment is harsh. At the same time, the signal of the detected target And very weak, these strong radiations are of...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the simulation of weak light signals under strong background radiation, the simulation level of weak light signals is relatively high, and the simulation environment will cause weak light signals to be annihilated and make the simulation The technical problem of failure, the present invention provides a weak light signal simulation system under strong background radiation in laser communication

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