electro optic
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2022 ◽  
Vol 149 ◽  
pp. 106821
Xiaolei Lv ◽  
Jiguang Zhao ◽  
Xuping Wang ◽  
Xiaoping Du ◽  
Bing Liu ◽  

2022 ◽  
Vol 146 ◽  
pp. 107548
Rotem Nahear ◽  
Yechiel Bach ◽  
Salman Noach

Photonics ◽  
2022 ◽  
Vol 9 (1) ◽  
pp. 41
Lu Han ◽  
Zhan Li ◽  
Chao Chen ◽  
Xin Sun ◽  
Junyong Zhang ◽  

Vector beams (VBs) have spatially inhomogeneous polarization states distribution and have been widely used in many fields. In this paper, we proposed a method to modulate polarization states of higher-order Poincaré (HOP) beams and designed a system based on Mach-Zehnder interferometers, in which polarization state (include azimuth and ellipticity) of generated HOP beams were modulated by linear electro-optic (EO) effect of nonlinear optical crystals. Using this method, the polarization state of generated HOP beams could be controlled by voltage signal applied on EO crystals, which makes the process of the polarization state change with no optical element moving and mechanical vibrations. Besides, due to the flexibility of the voltage signal, the polarization state could be switched directly and immediately.

2022 ◽  
Daoxin Dai ◽  
Bingcheng Pan ◽  
Hongyuan Cao ◽  
Yishu Huang ◽  
zong wang ◽  

2022 ◽  
Vol 11 (1) ◽  
Eléonore Roussel ◽  
Christophe Szwaj ◽  
Clément Evain ◽  
Bernd Steffen ◽  
Christopher Gerth ◽  

AbstractRecording electric field evolution in single-shot with THz bandwidth is needed in science including spectroscopy, plasmas, biology, chemistry, Free-Electron Lasers, accelerators, and material inspection. However, the potential application range depends on the possibility to achieve sub-picosecond resolution over a long time window, which is a largely open problem for single-shot techniques. To solve this problem, we present a new conceptual approach for the so-called spectral decoding technique, where a chirped laser pulse interacts with a THz signal in a Pockels crystal, and is analyzed using a grating optical spectrum analyzer. By borrowing mathematical concepts from photonic time stretch theory and radio-frequency communication, we deduce a novel dual-output electro-optic sampling system, for which the input THz signal can be numerically retrieved—with unprecedented resolution—using the so-called phase diversity technique. We show numerically and experimentally that this approach enables the recording of THz waveforms in single-shot over much longer durations and/or higher bandwidth than previous spectral decoding techniques. We present and test the proposed DEOS (Diversity Electro-Optic Sampling) design for recording 1.5 THz bandwidth THz pulses, over 20 ps duration, in single-shot. Then we demonstrate the potential of DEOS in accelerator physics by recording, in two successive shots, the shape of 200 fs RMS relativistic electron bunches at European X-FEL, over 10 ps recording windows. The designs presented here can be used directly for accelerator diagnostics, characterization of THz sources, and single-shot Time-Domain Spectroscopy.

ACS Photonics ◽  
2022 ◽  
Miguel Montesinos-Ballester ◽  
Lucas Deniel ◽  
Natnicha Koompai ◽  
Thi Hao Nhi Nguyen ◽  
Jacopo Frigerio ◽  

Tapan Ghosh ◽  
Madalasa Mondal ◽  
Ratheesh Vijayaraghavan

Understanding the variations in the solid-state optical signals of organic semiconductor materials upon subtle structural rearrangement or intermolecular interactions would help to extract the best performance in their electro-optic devices....

Frederic Du-Burck ◽  
Karim Manamanni ◽  
Tatiana Steshchenko ◽  
Amine Chaouche Ramdane ◽  
Vincent Roncin

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