Abstract
In the present paper efficiency of adaptive correction is analyzed in the turbulent atmosphere and under the conditions of thermal blooming. A numerical model of a typical adaptive optics system was developed to carry out the investigations. As it is known, phase conjugation and multidither, i.e., the algorithms commonly employed to correct for thermal and turbulent distortions of laser beams are unstable in nonlinear medium. We demonstrated that stability of phase control is possible to increase introducing the modifications of the algorithms. Also we demonstrated that phase compensation does not insure complete correction for thermal or turbulent aberrations induced by an atmospheric layer. To correct for aberrations under these conditions it is possible to employ amplitude-phase control over the beam, for example, to use the wavefront reversal algorithm. Realization of the algorithm is possible in a two-mirror adaptive system in which the control over beam phase is performed in two planes at the access to the medium. In numerical experiments it was shown that the two-mirror system insures the absolute compensation for a thin turbulent layer placed at arbitrary distance from the aperture of a laser source and high effectiveness of compensation for distributed lens comparing with phase-only algorithms.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 6341 |
| DOIs | |
| Publication status | Published - 2006 |
| Event | Speckle06: Speckles, From Grains to Flowers - Nimes, France Duration: 13 Sep 2006 → 15 Sep 2006 |
Other
| Other | Speckle06: Speckles, From Grains to Flowers |
|---|---|
| Country | France |
| City | Nimes |
| Period | 13.9.06 → 15.9.06 |
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Keywords
- Adaptive mirror
- Adaptive optics
- Numerical simulation
- Optical vortices
- Phase reconstruction
- Shack-Hartmann sensor
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics
Cite this
Adaptive control of laser beams propagating in the atmosphere. / Kanev, Feodor; Atepaeva, Natalya; Lukin, Vladimir; Makenova, Nailya Altykhanovna.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6341 2006. 634130.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Adaptive control of laser beams propagating in the atmosphere
AU - Kanev, Feodor
AU - Atepaeva, Natalya
AU - Lukin, Vladimir
AU - Makenova, Nailya Altykhanovna
PY - 2006
Y1 - 2006
N2 - In the present paper efficiency of adaptive correction is analyzed in the turbulent atmosphere and under the conditions of thermal blooming. A numerical model of a typical adaptive optics system was developed to carry out the investigations. As it is known, phase conjugation and multidither, i.e., the algorithms commonly employed to correct for thermal and turbulent distortions of laser beams are unstable in nonlinear medium. We demonstrated that stability of phase control is possible to increase introducing the modifications of the algorithms. Also we demonstrated that phase compensation does not insure complete correction for thermal or turbulent aberrations induced by an atmospheric layer. To correct for aberrations under these conditions it is possible to employ amplitude-phase control over the beam, for example, to use the wavefront reversal algorithm. Realization of the algorithm is possible in a two-mirror adaptive system in which the control over beam phase is performed in two planes at the access to the medium. In numerical experiments it was shown that the two-mirror system insures the absolute compensation for a thin turbulent layer placed at arbitrary distance from the aperture of a laser source and high effectiveness of compensation for distributed lens comparing with phase-only algorithms.
AB - In the present paper efficiency of adaptive correction is analyzed in the turbulent atmosphere and under the conditions of thermal blooming. A numerical model of a typical adaptive optics system was developed to carry out the investigations. As it is known, phase conjugation and multidither, i.e., the algorithms commonly employed to correct for thermal and turbulent distortions of laser beams are unstable in nonlinear medium. We demonstrated that stability of phase control is possible to increase introducing the modifications of the algorithms. Also we demonstrated that phase compensation does not insure complete correction for thermal or turbulent aberrations induced by an atmospheric layer. To correct for aberrations under these conditions it is possible to employ amplitude-phase control over the beam, for example, to use the wavefront reversal algorithm. Realization of the algorithm is possible in a two-mirror adaptive system in which the control over beam phase is performed in two planes at the access to the medium. In numerical experiments it was shown that the two-mirror system insures the absolute compensation for a thin turbulent layer placed at arbitrary distance from the aperture of a laser source and high effectiveness of compensation for distributed lens comparing with phase-only algorithms.
KW - Adaptive mirror
KW - Adaptive optics
KW - Numerical simulation
KW - Optical vortices
KW - Phase reconstruction
KW - Shack-Hartmann sensor
UR - http://www.scopus.com/inward/record.url?scp=33749855232&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33749855232&partnerID=8YFLogxK
U2 - 10.1117/12.695999
DO - 10.1117/12.695999
M3 - Conference contribution
SN - 0819464260
SN - 9780819464262
VL - 6341
BT - Proceedings of SPIE - The International Society for Optical Engineering
ER -