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Wave front aberration detection method and detection device

A wavefront aberration and detection method technology, applied in the field of adaptive optics, can solve the problems of sensitive laser flicker effect, inability to apply free space optical communication, poor real-time performance, etc.

Inactive Publication Date: 2012-09-19
JILIN UNIV
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Problems solved by technology

[0005] In order to solve the technical problems of the wavefront aberration detection method in the prior art, such as poor real-time performance and sensitive laser flicker effect, which cannot be applied to free space optical communication, a wavefront image with high real-time performance and can overcome the flicker effect is proposed. Difference detection method and detection device

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  • Wave front aberration detection method and detection device

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[0107] attached figure 1 It is a flowchart of a film-based holographic wavefront aberration detection method. A beam of the first laser carrier signal with a certain Zernike mode minimum amplitude aberration is interfered with a spherical first reference light wave converging at point A, and the light Strongly recorded on the film to form the first sub-hologram film; then another beam of the second laser carrier signal with the largest amplitude aberration of the same Zernike mode interferes with a spherical second reference light wave converging on point B, and the light The strong recordings on the film form a second sub-hologram film. Among them, A and B are two different points. Superimpose the first sub-hologram film and the second sub-hologram film to form a multi-element hologram film containing the mode aberration information; When filming, two beams of spherical waves will be reproduced at the same time, converging at A and B respectively, and the magnitude of the a...

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Abstract

The invention relates to a wave front aberration detection method and detection device. According to the wave front aberration detection method, aiming at a light carrier signal in free space light communication, a film replaces a holographic grating; and the wave front aberration of a light carrier wave in the free space light communication is calculated according to a holography and a mode wave front sensing theory, so that the algorithm complexity is reduced, and the detection efficiency is improved. The wave front aberration detection device detects the aberration by adopting the detection method and feeds the aberration back to an aberration correction part for correcting the aberration in real time. According to the wave front aberration detection method and detection device, the holography completely adopts an optical measure, and the film replaces the holographic grating, so the cost is reduced, the thickness can be ignored, a detection process is not delayed, and the energy concentration degree is increased, thus the communication distance is increased, and the performance of a communication system is improved; and furthermore, the wave front aberration is calculated by adopting relative light intensity, and the method is nonsensitive to twinkling of light waves so that the problem that the conventional detection device can not overcome the twinkling of the light waves is solved, and the reliability of the communication system is improved.

Description

technical field [0001] The invention relates to the technical field of adaptive optics applied in free-space optical communication, in particular to a wavefront aberration detection method and detection device. Background technique [0002] In recent years, free space optical communication has become the focus of research at home and abroad because of its strong wireless access advantages. Free space optical communication uses the atmosphere as a medium to transmit laser carrier signals, which has the advantages of high modulation rate, wide frequency band, and high utilization rate of spectrum resources. When there is no line-of-sight occlusion between two points, free-space optical communication can be used to realize point-to-point full-duplex communication, which does not occupy municipal resources, can be disassembled flexibly, and can be easily relocated to other places with low cost. The free space optical communication system can play a role in many aspects. For exa...

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Application Information

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IPC IPC(8): G01J9/02
Inventor 石文孝刘维王继红
Owner JILIN UNIV
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