Thermal blooming compensation using coherent optical adaptive techniques (COAT)
نویسندگان
چکیده
منابع مشابه
Capacity of coherent free-space optical links using atmospheric compensation techniques.
We analyze the ergodic capacity and epsilon-outage capacity of coherent optical links through the turbulent atmosphere. We consider the effects of log-normal amplitude fluctuations and Gaussian phase fluctuations, in addition to local oscillator shot noise, for both passive receivers and those employing active modal compensation of wavefront phase distortion. We study the effect of various para...
متن کاملExperimental Observations of Thermal-Blooming Compensation Using a Deformable-Mirror System
A laboratory experiment has demonstrated the effectiveness of compensating for forced-convection-dominated CW thermal blooming by using a deformable mirror to add phase corrections to the laser beam. In agreement with theoretical predictions, the peak focal-plane irradiance has been increased by a factor of 3 under severely bloomed conditions.
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We present recent studies on the impact of phase and amplitude fluctuations on Doppler lidars using coherent detection. As there is an emphasis on elucidating those implications of the atmospheric propagation problem that bear on the design and reliability of optical coherent lidar systems, we consider in a unified framework the effects of atmospheric turbulence and diffuse target speckle on th...
متن کاملThermal-Blooming Laboratory Experiments
• We conducted a multiphase series of laboratory experiments to explore the adaptive optics compensation of a laser beam distorted by strong thermal blooming. Our experimental approach was to create on a small, low-power beam the same phase distortion that would be experienced by a large, high-power beam propagating through the atmosphere and to apply phase compensation via deformable mirrors. ...
متن کاملPerformance of synchronous optical receivers using atmospheric compensation techniques.
We model the impact of atmospheric turbulence-induced phase and amplitude fluctuations on free-space optical links using synchronous detection. We derive exact expressions for the probability density function of the signal-to-noise ratio in the presence of turbulence. We consider the effects of log-normal amplitude fluctuations and Gaussian phase fluctuations, in addition to local oscillator sh...
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 1975
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.88248