Modal wavefront sensor based on binary phase-only multiplexed computer-generated hologram

Abstract

We propose an approach for implementing a modal wavefront sensor using a binary phase-only multiplexed computer-generated hologram (BPMCGH). To simplify the coding and fabricating processes, a model based on tilt plane reference waves and an effective coding scheme for BPMCGH have been developed. The necessary number of subholograms to be recorded or coded is significantly reduced, from two or even more to just one per aberration mode, accordingly. The numerical and experimental demonstration results are presented and discussed and show that this approach is convenient for producing a BPMCGH and efficient for sensing the aberration modes.

Breaking of Wavelength-Dependence in Holographic Wavefront Sensors Using Spatial-Spectral Filtering

“…The next step in improving holographic methods was the use of computer technology to synthesize holograms [ 17 ]. With the development of computer and digital holography methods, the process of creating holograms became more digitalized, which led to the creation of new elements, the synthesis of which was fully realized in a computer.…”

Аппаратно-Алгоритмическое Обеспечение Корреляционного Детектирования В Голографических Датчиках Волнового Фронта

“…Такой подход положил начало развитию ГДВФ в приложениях атмосферной адаптивной оптики, так как авторами была показана возможность измерения быстро осциллирующих аберраций волнового фронта. Впоследствии были предложены и другие похожие схемы ГДВФ [7][8][9][10][11][12][13][14][15], которые позволили расширить динамический диапазон, уменьшить погрешность, увеличить скорость измерений и снизить влияние кросс-модуляционных шумов. Однако так и не удалось преодолеть ключевые ограничения таких схем [16,17].…”

BER Analysis of Coherent Free Space Optical Communication Systems with Holographic Modal Wavefront Sensor

“…In 2000, Ghebremichael et al applied computer-generated holographic elements to wavefront sensing and corrected the response curve [21][22][23][24][25]. Changhai et al used the plane wave in combination with the Fourier lens for the replacement of spherical waves to improve the efficiency of energy utilization [26][27][28]. In this paper, based-on our previous work, HMWFS is applied to the coherent FSO systems to evaluate the BER performance improvement.…”