Adaptive Optics; Laser Shaping; Linear Quadratic Regulator; Optimal Control; Adaptive optics systems; Amplitude and phase correction; Closed-loop control; External disturbances; Laser projection system; Laser shaping; Linear quadratic regulator; Optimal controls; Electronic, Optical and Magnetic Materials; Condensed Matter Physics; Computer Science Applications; Applied Mathematics; Electrical and Electronic Engineering
Abstract :
[en] The adaptive optics system performance depends on multiple factors, including the quality of the laser beam before being projected to the mesosphere. Cumbersome procedures are required in the laser system to optimize the laser beam in terms of amplitude and phase. However, aberrations of the laser beam are still detected during the operations. The performance of laser projection systems can be improved compensating the effects of aberrations in the laser source or misalignment in the transfer optics before the laser beam propagating through the aperture. Despite the algorithm previously reported predict effective amplitude and phase correction is strongly dependent of an accurate DM characterization and transfer optics alignments. The use of feedback makes the system response better in presence of modeling error and external disturbances. A 2-DM closed loop approach for amplitude and a phase correction is designed. Finally the results of simulations and comparisons are discussed.
Disciplines :
Electrical & electronics engineering Space science, astronomy & astrophysics
Author, co-author :
Escárate, Pedro; Advanced Center for Electrical and Electronic Engineering, Universidad Tecnica Federico Santa Mara, Valparaso, Chile
Zúñiga Fernández, Sebastián Gaspar ; Université de Liège - ULiège > Astrobiology ; Advanced Center for Electrical and Electronic Engineering, Universidad Tecnica Federico Santa Mara, Valparaso, Chile
Castro, Mario; Advanced Center for Electrical and Electronic Engineering, Universidad Tecnica Federico Santa Mara, Valparaso, Chile
Garcés, Javier; Advanced Center for Electrical and Electronic Engineering, Universidad Tecnica Federico Santa Mara, Valparaso, Chile
Zagals, Diego; Advanced Center for Electrical and Electronic Engineering, Universidad Tecnica Federico Santa Mara, Valparaso, Chile
Marchioni, José; Advanced Center for Electrical and Electronic Engineering, Universidad Tecnica Federico Santa Mara, Valparaso, Chile
Solar, Mauricio; Departamento de Informatica, Universidad Tecnica Federico Santa Mara, Valparaso, Chile
Language :
English
Title :
Closed-loop control for laser beam shaping system before guide star projection
Publication date :
2016
Event name :
Adaptive Optics Systems V
Event place :
Edinburgh, Gbr
Event date :
26-06-2016 => 01-07-2016
Audience :
International
Main work title :
Adaptive Optics Systems V
Editor :
Marchetti, Enrico
Publisher :
SPIE
ISBN/EAN :
978-1-5106-0197-0
Peer reviewed :
Editorial reviewed
Funders :
The Society of Photo-Optical Instrumentation Engineers (SPIE)
J. W. Hardy, Adaptive Optics for Astronomical Telescopes. Oxford University Press, July 1998.
R. J. Sasiela, "Wave-front correction by one or more synthetic beacons, " J. Opt. Soc. Am. A, vol. 11, no. 1, pp. 379-393, Jan 1994. [Online]. Available: http://josaa.osa.org/abstract.cfm?URI=josaa-11-1-379
G. D. Love, "Wave-front correction and production of zernike modes with a liquid-crystal spatial light modulator, " Appl. Opt., vol. 36, no. 7, pp. 1517-1520, Mar 1997.
K. L. Baker, E. A. Stappaerts, D. Gavel, S. C. Wilks, J. Tucker, D. A. Silva, J. Olsen, S. S. Olivier, P. E. Young, M. W. Kartz, L. M. Flath, P. Kruelevitch, J. Crawford, and O. Azucena, "High-speed horizontalpath atmospheric turbulence correction with a large-Actuator-number microelectromechanical system spatial light modulator in an interferometric phase-conjugation engine, " Opt. Lett., vol. 29, no. 15, pp. 1781-1783, Aug 2004.
A. P. Norton, D. T. Gavel, M. Helmbrecht, C. Kempf, E. Gates, K. Chloros, D. Redel, R. Kupke, and D. Dillon, "Laser guidestar uplink correction using a MEMS deformable mirror: on-sky test results and implications for future AO systems, " in Proc. SPIE, vol. 9148, 2014, pp. 91 481C-91 481C-8. [Online]. Available: http://dx.doi.org/10.1117/12.2055564
C. Bechet, A. Guesalaga, B. Neichel, V. Fesquet, H. Gonzalez-Nũnez, S. Zũniga, P. Escarate, and D. Guzman, "Beam shaping for laser-based adaptive optics in astronomy, " Opt. Express, vol. 22, no. 11, pp. 12 994-13 013, 2014. [Online]. Available: http://www.opticsexpress.org/abstract.cfm?URI=oe-22-11-12994
S. Zũniga, C. Bechet, H. Gonzalez-Nũnez, B. Neichel, V. Fesquet, V. Garrel, P. Escarate, M. Castro, D. Guzman, and A. Guesalaga, "Laboratory validation of a laser shaping system before guide star projection, " in Proc. SPIE, vol. 9148, 2014, pp. 91 483I-91 483I-10. [Online]. Available: http://dx.doi.org/10.1117/12.2056062
J. D. Barchers and B. L. Ellerbroek, "Improved compensation of turbulence-induced amplitude and phase distortions by means of multiple near-field phase adjustments, " J. Opt. Soc. Am. A, vol. 18, no. 2, pp. 399-411, 2001.
J. D. Schmidt, Numerical Simulation of Optical Wave Propagation with examples in MATLAB. Bellingham, Washington USA: SPIE Press, 2010.
A. Guesalaga, B. Neichel, M. Boccas, C. D'Orgeville, F. Rigaut, D. Guzman, and J. Anguita, "Improving stability, robustness, and performance of laser systems, " in Proc. SPIE, vol. 8447, 2012, pp. 84 474M-84 474M-11. [Online]. Available: http://dx.doi.org/10.1117/12.924908
H. Kwakernaak and R. Sivan, Linear Optimal. Control Systems. Wiley Interscience, 1972.
B.D.O. Andreson and J. Moore, Linear Optimal Control. Prentice Hall, Englewood Cliffs, N.J., 1971.
