System for turbulence synchronous detection by using long-pulse laser and detection method thereof

A synchronous detection, long-pulse technology, applied in radio wave measurement systems, using re-radiation, measurement devices, etc., can solve the problems of reducing the detection accuracy of the wavefront, blurring and broadening of the light spot, etc., to improve operability, accurate and reliable results, The effect of reducing the complexity of the system

Active Publication Date: 2020-03-24
CHONGQING TECH & BUSINESS UNIV
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Problems solved by technology

[0004] When the laser beam that produces the artificial beacon is focused by the beam expansion of the transmitting telescope, the atmospheric turbulence in the transmitting aperture of the uplink path will distort the uplink laser wavefront, which will cause the spot to be blurred and widened, and reduce the accuracy of wavefront detection

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  • System for turbulence synchronous detection by using long-pulse laser and detection method thereof
  • System for turbulence synchronous detection by using long-pulse laser and detection method thereof
  • System for turbulence synchronous detection by using long-pulse laser and detection method thereof

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0035] For ease of understanding, firstly, the background of this application will be further elaborated. When the sodium laser is transmitted in the atmosphere, it will inevitably produce Rayleigh scattering with atmospheric molecules. The Rayleigh return light generated by the laser is used as a beacon to detect the turbulence in the uplink path, which can not only make full use of the laser, but also avoid the use of an additional separate laser to generate a beacon to detect the turbulence in the uplink path, which simplifies the complexity of the system and improves the operability of the system sex.

[0036] And when a complete pulse is launched into the atmosphere through the transmitting telescope, the laser in this pulse will be scattered with the atmosphere. Taking the solid quasi-continuous sodium beacon laser of the Institute of Physics and Chemistr...

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Abstract

The invention discloses a system for turbulence synchronous detection by using long-pulse laser and a detection method thereof. The system comprises a beacon laser, a first light splitting mechanism,a turbulence detector, a wavefront controller, a phase modulator, a reflector and a transmitting telescope, and the beacon laser can emit the long-pulse laser. The method is mainly characterized by layering the atmospheric turbulence and carrying segmented detection on the emergent pulse laser to detect the wavefront distortion generated when each segment of pulse laser penetrates through different turbulence layers separately, and then carrying out decoupling calculation through a special decoupling algorithm, and restoring the distortion information W = f (WM, W1) of a whole uplink path. Byutilizing the transmission characteristics of the long pulses fully, and through the special decoupling algorithm, the atmospheric turbulence information on a transmitting path is obtained; and by pre-correcting a sodium beacon, the form of the sodium beacon is effectively improved, the performance of a rear-end self-adaptive optical system is improved, meanwhile, the laser energy utilization rateis increased, the complexity of the system is simplified, and the extremely good operability is achieved.

Description

technical field [0001] The invention relates to an adaptive optics system, in particular to a system for synchronous detection of turbulence by using long pulse laser and a detection method thereof. Background technique [0002] The Adaptive Optics (AO) system uses the beacon to detect the real-time wavefront of atmospheric turbulence, and the wavefront controller controls the active components in real time to compensate the distorted wavefront according to the detection signal, so that the distorted wavefront can be restored to a plane wavefront, thereby Obtain diffraction-limited imaging. When the brightness of the observed object itself does not meet the detection requirements and there is no natural beacon that meets the conditions within the equi-halo angle, artificial beacons are mainly used for wavefront detection. There are two main ways to produce artificial beacons: one uses the back Rayleigh scattered back light of atmospheric molecules to produce Rayleigh beacon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 黄建尧联群王功长
Owner CHONGQING TECH & BUSINESS UNIV
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