Temporal imaging system based on four-wave mixing interaction which do not require synchronization to a pump wave

2020 ◽  
Author(s):  
Avi Klein ◽  
Inbar Sibony ◽  
Sara Meir ◽  
Ori Friedman ◽  
Shir Shahal ◽  
...  
Keyword(s):  
Pump Wave ◽  
Imaging System ◽  
Four Wave Mixing ◽  
Wave Mixing

scholarly journals Transient four-wave mixing in a transparent two-component medium

2018 ◽  
Vol 42 (2) ◽  
pp. 227-235
Author(s):  
V. V. Ivakhnik ◽  
M. V. Savelyev
Keyword(s):  
Pump Wave ◽  
Four Wave Mixing ◽  
Spatial Spectrum ◽  
Object Wave ◽  
Wave Radiation ◽  
Wave Mixing ◽  
Angular Rotation ◽  
Spatial Frequencies ◽  
Two Component ◽  
Pump Waves

We analyze changes in the spatial structure of an object wave under four-wave mixing in a transparent two-component medium in schemes with opposing and concurrent pump waves. It is shown that in the spatial spectrum of the object wave there is a dip, whose position is determined by the propagation direction of the second pump wave. Angular rotation and frequency shift of the pump waves lead to a decrease in the conversion efficiency of high spatial frequencies. The bandwidth of the spatial frequencies cut out by the four-wave radiation converter decreases monotonically over time, whereas the bandwidth of the most efficiently converted spatial frequencies increases.

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