Adaptive optics system for a short wavelength mid-IR laser based on a Shack-Hartmann wavefront sensor and analysis of thermal noise impacts

0564267 - FZÚ 2023 RIV US eng J - Článek v odborném periodiku
Zhou, Huang - Pilař, Jan - Smrž, Martin - Chen, Liyuan - Čech, M. - Mocek, Tomáš
Adaptive optics system for a short wavelength mid-IR laser based on a Shack-Hartmann wavefront sensor and analysis of thermal noise impacts.
Applied Optics. Roč. 61, č. 27 (2022), s. 7958-7965. ISSN 1559-128X. E-ISSN 2155-3165
Grant CEP: GA MŠMT EF15_006/0000674
GRANT EU: European Commission(XE) 739573 - HiLASE CoE
Grant ostatní: OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institucionální podpora: RVO:68378271
Klíčová slova: mid-IR laser * Shack-Hartmann wavefront sensor * analysis of thermal noise impacts
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 1.9, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1364/AO.464676

We present an adaptive optics (AO) system for a 1.94-µm laser source. Our system consists of a home-made Shack– Hartmann wavefront sensor and silver-coated bimorph deformable mirror operating in a closed-loop control scheme. The wavefront sensor used an uncooled vapor phase deposition PbSe focal-plane array for the actual light sensing. An effect of thermal afterimage was found to be reducing the centroid detection precision significantly. The effect was analyzed in detail and finally has been dealt with by updating the background calibration. System stability was increased by reduction of control modes. The system functionality and stability were demonstrated by improved focal spot quality. By replacing some of the used optics, the range of the demonstrated mid-IR AOS could be extended to cover the spectral range of 1–5 µm. To the best of our knowledge, it is the first AO system built specifically for mid-IR laser wavefront correction.
Trvalý link: https://hdl.handle.net/11104/0335968