High-speed horizontal-path atmospheric turbulence correction using a large actuator-number MEMS spatial light modulator in an interferometric phase conjugation engine

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Atmospheric propagation results for a high-speed, large-actuator-number, adaptive optics system are presented. The system uses a MEMS-based spatial light modulator correction device with 1024 actuators. Tests over a 1.35 km path achieved correction speeds in excess of 800 Hz and Strehl ratios close to 0.5. The wave-front sensor was based on a quadrature interferometer that directly measures phase. This technique does not require global wave-front reconstruction, making it relatively insensitive to scintillation and phase residues. The results demonstrate the potential of large actuator number MEMS-based spatial light modulators to replace conventional deformable mirrors.

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Baker, K; Stappaerts, E; Gavel, D; Wilks, S; Tucker, J; Silva, D et al. March 4, 2004.

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Atmospheric propagation results for a high-speed, large-actuator-number, adaptive optics system are presented. The system uses a MEMS-based spatial light modulator correction device with 1024 actuators. Tests over a 1.35 km path achieved correction speeds in excess of 800 Hz and Strehl ratios close to 0.5. The wave-front sensor was based on a quadrature interferometer that directly measures phase. This technique does not require global wave-front reconstruction, making it relatively insensitive to scintillation and phase residues. The results demonstrate the potential of large actuator number MEMS-based spatial light modulators to replace conventional deformable mirrors.

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PDF-file: 19 pages; size: 0.4 Mbytes

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  • Journal Name: Optics Letters, vol. 29, no. 15, September 1, 2004, pp. 1781-1783

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  • Report No.: UCRL-JRNL-203988
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 892790
  • Archival Resource Key: ark:/67531/metadc882838

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  • March 4, 2004

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 29, 2016, 12:47 p.m.

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Baker, K; Stappaerts, E; Gavel, D; Wilks, S; Tucker, J; Silva, D et al. High-speed horizontal-path atmospheric turbulence correction using a large actuator-number MEMS spatial light modulator in an interferometric phase conjugation engine, article, March 4, 2004; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc882838/: accessed August 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.