Free space optical communication using laser12/13/2023 ![]() ![]() To meet this challenge, MEMS micromirrors must meet stringent criteria on their performance in terms of flatness, roughness and resolution of position. This proposal is concerned with development of MEMS micromirrors for correction of aberrations in the primary mirror and improvement of image quality, thus reducing the optical requirements on the deployable mirrors. The key to meeting this requirement is a more ยป lightweight optics system with a deformable primary and secondary mirrors and an adaptive optic subsystem correction of wavefront distortion. To reduce cost of deployment, such a system must be dramatically lighter than a traditional satellite surveillance system with a high spatial resolution. ![]() ![]() One way to satisfy these requirements involves a constellation of satellites in low earth orbit capable of resolving a spot on the order of 20 cm. To be useful, the satellite must be able to continuously monitor objects the size of a person anywhere on the globe and do so at a low cost. Recent world events have underscored the need for a satellite based persistent global surveillance capability. Ultimately this testbed will be used to test all aspects of the system architecture for an extrasolar planet-finding AO system. Stability and repeatability of the MEMS devices was also tested. Consistent flattening required testing and characterization of the individual actuator response, including the effects of dead and low-response actuators. Such a system relies heavily on recent progress in Micro-Electro-Mechanical Systems (MEMS) deformable mirrors, as well as improved communication and computational =. In particular, we show work in progress toward a high-speed, small footprint Adaptive Optics system for horizontal and slant path laser communications. In this paper, we propose a method to improve signal quality through the use of adaptive optics. For cases of long distance optical propagation, atmospheric turbulence will ultimately limit the maximum achievable data rate. There exists a potential need to extend this pathlength to distances much greater than a 1 km, particularly for government and military applications. These solutions are geared toward solving the ''last mile'' connectivity issues. Currently, a handful of companies provide fiberless alternatives specifically aimed at corporate intranet and sporting event video applications. Free space optical communications (FSO) are beginning to provide attractive alternatives to fiber-based solutions in many situations. ![]()
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