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17 February 2010 High-power visible-laser effect on a 37-segment Iris AO deformable mirror
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Proceedings Volume 7595, MEMS Adaptive Optics IV; 759506 (2010)
Event: SPIE MOEMS-MEMS, 2010, San Francisco, California, United States
We have tested an aluminum-coated Iris AO Micro-Electrical Mechanical System (MEMS) segmented Deformable Mirror (DM) for its behavior in the presence of high energy 532 nm laser light. The DM was subject to several tests in which the laser power and the duration of its incidence was varied. The DM experienced an irradiance of 94.5 W cm-2 at the maximum laser power of 2 W. A slight permanent reduction in the amount of bow in each segment was observed. This is most likely due to annealing. The mirror remained fully functional during and after the tests. Measurements of the mirror's temporal stability and position repeatability were performed before the laser test. We found a 1.28 nm rms variation in the bow of segments that is highly correlated over the 16 minute test. The mirror's ability to return to its initial position was within the 1.34 nm rms instrument noise. These results are encouraging for applications such as the laser uplink correction of the Visible Light Laser Guidestar Experiment (Villages) and future multi-Laser Guidestar systems (LGS).
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Andrew Norton, Donald Gavel, and Daren Dillon "High-power visible-laser effect on a 37-segment Iris AO deformable mirror", Proc. SPIE 7595, MEMS Adaptive Optics IV, 759506 (17 February 2010);

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