FIG. 1. System diagram: (a) FSOC system with sensor-less AO system, (b) sensor-less AO system.
FIG. 2. Aberration modes (3rd-20th): (a) Zernike mode aberrations, (b) the corresponding focal-plane intensity distributions.
FIG. 3. Flow chart for the WFS-less hybrid method.
FIG. 4. Initial wave-front aberration: (a) Zernike coefficients, (b) phase plane.
FIG. 5. Distortion correction by the JA method: (a) SR variation, (b) phase plane after 5 corrections.
FIG. 6. Correction by the SPGD algorithm: (a) SR variation, (b) phase plane after 1000 corrections.
FIG. 7. Correction by the WFS-less hybrid method: (a) SR improvement, (b) wave-front aberration phase after 5 iterations, (c) wavefront aberration phase after 300 iterations.
FIG. 8. Normalized light intensities: (a) initial distorted light, (b) after 5 iterations, (c) after 300 iterations.
FIG. 9. Improvement of SR for different initial aberrations, with the WFS-less hybrid method.
FIG. 10. Improvement of SR for different aberrations (a)-(h), with the SPGD, JA and WFS-less hybrid methods.
TABLE 1. Relation of (n,m) and t
TABLE 2. Correction results with the WFS-less hybrid method
TABLE 3. Results of aberration correction
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