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| Citation: |
Sun Quan, Lv Pin, Ning Yu, et al. Application of optical system simulation software Seelight in adaptive optics[J]. Opto-Electronic Engineering, 2018, 45(3): 180077. doi: 10.12086/oee.2018.180077
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Application of optical system simulation software Seelight in adaptive optics
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Abstract
The optical system simulation software Seelight is a system simulation software with independent intellectual property rights which can simulate beam generation, atmospheric transmission and adaptive beam control. The software provides an effective simulation tool for the application fields of optical system. In this article, we introduce the basic structure of Seelight software, the running interface, and the main modules of model libraries. Using the basic models of adaptive optics to build adaptive optics simulation systems, including the PZT deformable mirror module and the Hartmann wavefront sensor module, which improves the beam quality of the far field by correcting the wavefront aberration due to beam propagation through atmosphere. The correction effect of adaptive optics simulation system is verified under the different turbulence intensity, it is clear that correction residual greatly increased with the increasing of turbulence intensity. The Seelight software can be used to simulate various optical systems including adaptive optics system, and the system can be validated and optimized.-
Keywords:
- seelight /
- adaptive optics /
- simulation /
- verification and analysis
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References
[1] Andrews L C, Phillips R L. Laser beam propagation through random media[M]. 2nd ed. Bellingham, WA: SPIE Press, 2005. [2] Nelson W, Palastro J P, Wu C, et al. Using an incoherent target return to adaptively focus through atmospheric turbulence[J]. Optics Letters, 2016, 41(6): 1301-1305. doi: 10.1364/OL.41.001301 [3] Carbillet M, Riccardi A. Numerical modeling of atmospherically perturbed phase screens: new solutions for classical fast Fourier transform and Zernike methods[J]. Applied Optics, 2010, 49(31): G47-G52. doi: 10.1364/AO.49.000G47 [4] Sedmak G. Implementation of fast-Fourier-transform-based simulations of extra-large atmospheric phase and scintillation screens[J]. Applied Optics, 2004, 43(23): 4527-4538. doi: 10.1364/AO.43.004527 [5] Le Louarn M, Clare R, Béchet C, et al. Simulations of adaptive optics systems for the E-ELT[J]. Proceedings of SPIE, 2012, 8447: 84475D. [6] Carbillet M, Vérinaud C, Femenía B, et al. Modelling astronomical adaptive optics-Ⅰ. The software package CAOS[J]. Monthly Notices of the Royal Astronomical Society, 2005, 356(4): 1263-1275. doi: 10.1111/mnr.2005.356.issue-4 [7] Kanev F Y, Lukin V V, Makenova N A. Numerical simulation in adaptive optics[J]. Proceedings of SPIE, 2005, 6018: 139-147. [8] Widiker J J, Miller N J, Whiteley M R. Real-time coherent phased array image synthesis and atmospheric compensation testing[J]. Proceedings of SPIE, 2012, 8395: 839505. doi: 10.1117/12.921892 [9] 网络版Seelight光学系统虚拟仿真实验平台[EB/OL]. http://www.seelight.net/. [10] Tyson P K. Principles of Adaptive Optics[M]. Pittsburgh: Academic Press, 1991. -
Overview
Overview: Beam propagation and adaptive optics are two of the most important technical problems in the application of modern high energy laser systems. Numerical simulation is an effective method for studying beam atmospheric transmission and adaptive optics correction. Many researches on numerical simulation in this field were carried out in and abroad, most of which are with the simulation programs of the beam atmospheric transmission and adaptive optics system correction. We also developed an optical system simulation software Seelight which can simulate beam generation, atmospheric transmission and adaptive beam control. The software provides an effective simulation tool for the application fields of optical system. The Seelight software is based on the basic principles of wave optics theory and computer simulation, and realizes the construction and design of optical simulation system by means of the graphical interface, which is "what you see is what you get". The software has seven core model libraries, including the source library, the target library, the detector library, the beam propagation library, the control library, the optics device library and the auxiliary library. Each sub-library contains several main modules with independent functions or representative devices. Using the PZT deformation mirror module and the Hartmann wavefront sensor module to build basic adaptive optics simulation systems, which was used to correct the wavefront aberration due to beam propagation through atmosphere. The linear number of the actuators of PZT deformable mirror is 9 and the linear number of the subapertures of Hartmann wavefront sensor is 8. With the adaptive optics system closed-loop control, the beam quality of the far field calculated by CCD camera was improved from 2.9 to 1.4 times of the diffraction limit. A simulation system was built with a 4 km horizontal atmospheric propagation path which included an adaptive optics system. The parameters of the adaptive optics system were exactly the same as those shown in the previous illustration. The correction effect of adaptive optics simulation system was verified under different turbulence intensities which were represented by r0 values from 3 cm to 18 cm @1064 nm wavelength, and it was clear that correction residual errors greatly increased with the increasing of turbulence intensity. The simulation results showed consistent with the trend of the fitting curve according to the theoretical formula in the reference. The Seelight software can be used to simulate various optical systems including adaptive optics system, and the system can be validated and optimized.
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Sun Quan, Lv Pin, Ning Yu, et al. Application of optical system simulation software Seelight in adaptive optics[J]. Opto-Electronic Engineering, 2018, 45(3): 180077. doi: 10.12086/oee.2018.180077
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Figure 1.
The graphical operation interface of the simulation system
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Figure 2.
The model libraries of simulation system
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Figure 3.
(a) Schematic diagram of adaptive optics; (b) Model diagram of adaptive optics simulation system
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Figure 4.
The parameters setting interface of Hartmann wavefront sensor
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Figure 5.
The parameters setting interface of PZT deformable mirror
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Figure 6.
The simulation results of adaptive optics system. (a) The turbulence phase screen; (b) The subaperture spots of Hartmann wavefront sensor; (c) The surface shape of PZT deformable mirror; (d) The farfield spot of CCD in open-loop; (e) The farfield spot of CCD in closed-loop
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Figure 7.
The correction residual errors of adaptive optics system change with the turbulence intensity
