Adaptive Half-Symmetric Unstable Resonator With Internal Axicon (HSURIA) Studies II: Deformable Mirror Located In The Annular Beam Region

J. M. Spinhirne; D. Anafi

doi:10.1117/12.934201

23 August 1983 Adaptive Half-Symmetric Unstable Resonator With Internal Axicon (HSURIA) Studies II: Deformable Mirror Located In The Annular Beam Region

J. M. Spinhirne, D. Anafi

Author Affiliations +

Proceedings Volume 0365, Adaptive Optics Systems and Technology; (1983) https://doi.org/10.1117/12.934201
Event: 26th Annual Technical Symposium, 1982, San Diego, United States

Abstract

Intracavity adaptive optics (ICAO) studies were performed using a deformable mirror in the annular beam region of an HSURIA (half symmetric unstable resonator with internal axicon). Figuring of the deformable mirror to remove the residual aberrations of the conical optics results in good resonator mode quality, however, convergence of the multidither control to this optimum configuration occurs only for small perturbations of the resonator from its optimum operating condition. For example, w-axicon tilt aberration correction studies show control convergence to the global maximum only up to 5 Irad tilt, but the deformable mirror is shown to have the capability to correct for at least 30 Arad w-axicon tilt. Control convergence to a local maxima will occur whenever a barrier such as a resonator mode crossing point exists between the initial state and the global maximum of the resonator. The limited range of global maximum convergence by the hill-climbing servo controller is directly tied to the experimentally verified extreme perturbation sensitivity of the HSURIA.

Citation Download Citation

J. M. Spinhirne and D. Anafi "Adaptive Half-Symmetric Unstable Resonator With Internal Axicon (HSURIA) Studies II: Deformable Mirror Located In The Annular Beam Region", Proc. SPIE 0365, Adaptive Optics Systems and Technology, (23 August 1983); https://doi.org/10.1117/12.934201

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