Second-order temporal and spatial coherence of thermal electrons

1987 ◽  
Vol 99 (2) ◽  
pp. 227-245 ◽  
Author(s):  
M. P. Silverman
Keyword(s):  
Spatial Coherence ◽  
Second Order ◽  
Temporal And Spatial

scholarly journals Optical coherence encryption with structured random light

PhotoniX ◽  
2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Deming Peng ◽  
Zhaofeng Huang ◽  
Yonglei Liu ◽  
Yahong Chen ◽  
Fei Wang ◽  
...  
Keyword(s):  
Fractional Fourier Transform ◽  
Spatial Coherence ◽  
Second Order ◽  
Statistical Characteristics ◽  
Interference Effects ◽  
Complex Environments ◽  
Optical Encryption ◽  
Light Matter Interaction ◽  
Encryption Method ◽  
Promising Avenue

AbstractInformation encryption with optical technologies has become increasingly important due to remarkable multidimensional capabilities of light fields. However, the optical encryption protocols proposed to date have been primarily based on the first-order field characteristics, which are strongly affected by interference effects and make the systems become quite unstable during light–matter interaction. Here, we introduce an alternative optical encryption protocol whereby the information is encoded into the second-order spatial coherence distribution of a structured random light beam via a generalized van Cittert–Zernike theorem. We show that the proposed approach has two key advantages over its conventional counterparts. First, the complexity of measuring the spatial coherence distribution of light enhances the encryption protocol security. Second, the relative insensitivity of the second-order statistical characteristics of light to environmental noise makes the protocol robust against the environmental fluctuations, e.g, the atmospheric turbulence. We carry out experiments to demonstrate the feasibility of the coherence-based encryption method with the aid of a fractional Fourier transform. Our results open up a promising avenue for further research into optical encryption in complex environments.

Mutual effects of temporal and spatial coherence of laser radiation during wind refraction

1989 ◽  
Vol 32 (7) ◽  
pp. 606-611
Author(s):  
V. A. Aleshkevich ◽  
G. D. Kozhoridze ◽  
A. N. Matveev
Keyword(s):  
Laser Radiation ◽  
Spatial Coherence ◽  
Temporal And Spatial

Effects of random bottom bathymetry on temporal and spatial coherence in shallow water propagation

2011 ◽  
Vol 130 (4) ◽  
pp. 2349-2349
Author(s):  
Jennifer Wylie ◽  
Felipe Lourenco ◽  
Harry DeFerrari
Keyword(s):  
Shallow Water ◽  
Spatial Coherence ◽  
Temporal And Spatial

Analytical model of a double grating system with partial temporal and spatial coherence

2005 ◽  
Author(s):  
Luis Miguel Sanchez-Brea ◽  
Jose Alonso ◽  
Jose Bienvenido Saez-Landete ◽  
Eusebio Bernabeu
Keyword(s):  
Analytical Model ◽  
Spatial Coherence ◽  
Temporal And Spatial
Sign in / Sign up

Export Citation Format

Share Document