Wavefront correction algorithm based on a complete second-order DM-SHWS model for free-space optical communications
| Autor: | Haifeng Yang, Yu Zhong, Jie Zhong, Wenhao Yu, Gaojie Chen, Hongliang Mao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Wavefront
Computer science business.industry Astrophysics::Instrumentation and Methods for Astrophysics Optical communication Physics::Optics Wavefront sensor Residual 01 natural sciences Atomic and Molecular Physics and Optics Deformable mirror 010309 optics Root mean square Optics 0103 physical sciences Electrical and Electronic Engineering Adaptive optics business Engineering (miscellaneous) Free-space optical communication |
| Zdroj: | Applied optics. 60(16) |
| ISSN: | 1539-4522 |
| Popis: | Free-space optical communication brings large-capacity communication with excellent confidentiality, though fatal obstacles are set by atmospheric turbulence that causes phase shifting in laser links. Therefore, we derived a novel, to the best of our knowledge, iterative wavefront correction algorithm based on a complete second-order deformable mirror (DM) Shack–Hartmann wavefront sensor model as a solution to it. For correcting static wavefront aberration, the proposed algorithm possesses a converging speed faster than the traditional one. In terms of correcting dynamic atmospheric turbulence, it can achieve convergence within two iterations with a residual wavefront root mean square value of less than 1/8 wavelength. The input wavefront under 1.5 wavelength can be corrected on our testbed due to the deformability of the micromachined membrane DM. The research result offers a solution for atmospheric turbulence in the adaptive optics field and may contribute to the development of free-space optical communication. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|