Impact of beacon wavelength on phase-compensation performance
Document Type
Conference Proceeding
Publication Date
1-1-2017
Abstract
© 2017 SPIE. This study evaluates the effects of beacon-wavelength mismatch on phase-compensation performance. In general, beacon-wavelength mismatch occurs at the system level because the beacon-illuminator laser (BIL) and high-energy laser (HEL) are often at different wavelengths. Such is the case, for example, when using an aperture sharing element to isolate the beam-control sensor suite from the blinding nature of the HEL. With that said, this study uses the WavePlex Toolbox in MATLAB® to model ideal spherical wave propagation through various atmospheric-turbulence conditions. To quantify phase-compensation performance, we also model a nominal adaptive-optics (AO) system. We achieve correction from a Shack-Hartmann wavefront sensor and continuous-face-sheet deformable mirror using a least-squares phase reconstruction algorithm in the Fried geometry and a leaky integrator control law. To this end, we plot the power in the bucket metric as a function of BIL-HEL wavelength difference. Our initial results show that positive BIL-HEL wavelength differences achieve better phase compensation performance compared to negative BIL-HEL wavelength differences (i.e., red BILs outperform blue BILs). This outcome is consistent with past results.
Publication Title
Proceedings of SPIE - The International Society for Optical Engineering
Recommended Citation
Enterline, A.,
Spencer, M.,
Burrell, D.,
&
Brennan, T.
(2017).
Impact of beacon wavelength on phase-compensation performance.
Proceedings of SPIE - The International Society for Optical Engineering,
10410.
http://doi.org/10.1117/12.2270495
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/12070
