Correction of segmented mirror aberrations by phase conjugation and dynamic holography
| Autor: | V. Yu. Venediktov, M. P. Bogdanov, S. I. Kliment'ev, V. M. Irtuganov, V E Sherstobitov, I. B. Orlova, Sergei A. Dimakov, D A Goryachkin, V P Kalinin, Alexander V. Gorlanov, I. M. Kozlovskaya, A.M. Grigor'ev |
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| Rok vydání: | 1996 |
| Předmět: |
Physics
Diffraction business.industry Segmented mirror Holography Physics::Optics Radiation Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Optics law Laser beam quality Electrical and Electronic Engineering Physical and Theoretical Chemistry business Phase conjugation Beam (structure) |
| Zdroj: | Optics Communications. 129:405-413 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/s0030-4018(96)00198-8 |
| Popis: | A novel approach is proposed for using the phase conjugation phenomenon for dynamic correction of distortions in beam forming laser systems. The method is based on the well-known application of a special diffraction structure on the surface of corrected optical elements ensuring nonreciprocal beam propagation in a system including a phase conjugate mirror. The main feature of the proposed approach is that it uses the diffraction structure which is not static (as usually) but is written dynamically by a small auxiliary laser source irradiating the corrected element surface simultaneously with the working beam. This makes it possible to extend the capabilities of the known method with respect to scaling-up the size of compensated mirrors and allows replacement of a large solid mirror by a segmented one. The novel method of correction has been tested experimentally by the use of 1.06 μm radiation for recording the dynamic hologram and a 10.6 μm laser beam as the working beam, distorted by a two-segment mirror with a dynamic hologram on its surface and corrected by a phase conjugate mirror. The means of dynamic hologram recording in different spectral ranges are discussed. |
| Databáze: | OpenAIRE |
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