Holographic wavefront sensing with spatial light modulator in context of horizontal light propagation

2012 ◽  
Author(s):  
A. Zepp
Keyword(s):  
Spatial Light Modulator ◽  
Light Propagation ◽  
Wavefront Sensing ◽  
Light Modulator

scholarly journals Implementation of a Phase Only Spatial Light Modulator as an Atmospheric Turbulence Simulator at 1550 nm

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Carlos Font ◽  
Freddie Santiago ◽  
G. Charmaine Gilbreath ◽  
David Bonanno ◽  
Blerta Bajramaj ◽  
...  
Keyword(s):  
Atmospheric Turbulence ◽  
Free Space ◽  
Spatial Light Modulator ◽  
Light Propagation ◽  
New Technologies ◽  
Short Wave ◽  
Controlled Environment ◽  
Light Modulator ◽  
Propagation Of Light ◽  
Laser Communications

Modeling and simulating atmospheric turbulence in a controlled environment have been a focus of interest for scientists for decades. The development of new technologies allows scientists to perform this task in a more realistic and controlled environment and provides powerful tools for the study and better understanding of the propagation of light through a nonstatic medium such as the atmosphere. Free space laser communications (FSLC) and studies in light propagation through the atmosphere are areas which constantly benefit from breakthroughs in technology and in the development of realistic atmospheric turbulence simulators, in particular (Santiago et al. 2011). In this paper, we present the results from the implementation of a phase only spatial light modulator (SLM) as an atmospheric turbulence simulator for light propagation in the short-wave infrared (SWIR) regime. Specifically, we demonstrate its efficacy for its use in an FSLC system, at a wavelength of 1550 nm.

Wavefront sensing based on a spatial light modulator and incremental binary random sampling

2017 ◽  
Vol 42 (3) ◽  
pp. 603 ◽  
Author(s):  
Ben-Yi Wang ◽  
Lu Han ◽  
Yang Yang ◽  
Qing-Yang Yue ◽  
Cheng-Shan Guo
Keyword(s):  
Random Sampling ◽  
Spatial Light Modulator ◽  
Wavefront Sensing ◽  
Light Modulator

Enhancement of wavefront measurement sensitivity in a zonal wavefront sensor without curtailing the sensing speed

2021 ◽  
Author(s):  
Nagendra Kumar ◽  
Alika Khare ◽  
Bosanta Ranjan Boruah
Keyword(s):  
Spatial Light Modulator ◽  
Frame Rate ◽  
Wavefront Sensing ◽  
Ferroelectric Liquid Crystal ◽  
Measurement Sensitivity ◽  
Light Modulator ◽  
Enhanced Sensitivity ◽  
Wavefront Measurement ◽  
Active Zones ◽  
Zone Sampling

Abstract In this paper we propose a zonal wavefront sensing scheme that facilitates wavefront measurement with enhanced sensitivity at the standard video rate. We achieve this enhanced sensitivity by implementing a sequential display of binary holograms described over each zone sampling the incident wavefront with the help of a ferroelectric liquid crystal spatial light modulator. By keeping the number of active zones as 24 and using a camera with an imaging frame rate equal to the binary hologram display rate of the spatial light modulator, we are able to reach the sensing frame rate of 60 Hz. In addition to enhancement in sensitivity, the proposed scheme facilitates zone wise tuning of binary holograms and eliminates the possibility of any crosstalk between adjacent zones. We perform a proof-of-principle experiment that validates the proposed zonal wavefront sensing scheme and demonstrates its advantages.

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