scholarly journals Development and Characterization of a Small Spacecraft Electro-Optic Scanner for Free-Space Laser Communications

2016 ◽  
Author(s):  
Scott Davis ◽  
Michael Lichter ◽  
Daniel E. Raible
Keyword(s):  
Free Space ◽  
Small Spacecraft ◽  
Electro Optic ◽  
Laser Communications

BROAD BAND MID-INFRARED THz PULSE: MEASUREMENT TECHNIQUE AND APPLICATIONS

1999 ◽  
Vol 08 (01) ◽  
pp. 89-105 ◽  
Author(s):  
P. Y. HAN ◽  
G. C. CHO ◽  
X.-C. ZHANG
Keyword(s):  
Measurement Technique ◽  
Free Space ◽  
Broad Band ◽  
Nonlinear Material ◽  
Infrared Range ◽  
Time Resolved ◽  
Mid Infrared ◽  
Electro Optic ◽  
Ultrashort Laser

We present in this article the recent development of the measurement technique for coherent free-space THz field and applications in the mid-infrared range. The technique is based on the second-order nonlinear optical interaction both for the generation and for the detection of THz pulse. Particularly the detection process based on free-space electro-optic sampling gives us a possibility to timely trace directly the ultrabroad band coherent THz field unparalleled by other technique. Using an ultrashort laser pulse our measurement system is feasible to measure the ultrashort THz pulse with a bandwidth up to 40 THz. We present a detailed comparative study on the generation and detection using different nonlinear material. We demonstrate applications of the coherent THz technique for time-resolved semiconductor spectroscopy, time-domain imaging with high spatial resolution and broad band refractive and absorptive characterization of material in the mid-infrared range.

Electro-Optical Properties of Na0.5K0.5NbO3Films on Si by Free-Space Coupling Technique

2004 ◽  
Vol 817 ◽  
Author(s):  
Alexander M. Grishin ◽  
Sergey I. Khartsev
Keyword(s):  
Free Space ◽  
Polarized Light ◽  
Polar Axis ◽  
Rf Magnetron Sputtering ◽  
Processing Parameters ◽  
Reflected Light ◽  
Electro Optic ◽  
Bias Electric Field ◽  
Si Films

AbstractWe report electro-optic performance of highly polar axis oriented Na0.5K0.5NbO3(NKN) films grown directly on Pt(100nm)/Ti(10nm)/SiO2/Si(001) substrates by rf-magnetron sputtering. Semitransparent gold electrodes (diameter Ø= 2 mm) were deposited ontop the NKN films by a thermal evaporation through the contact mask. Processing parameters have been specially optimized to obtain “electrosoft” NKN films with a non-linear fatigue-free P-E characteristics: low remnant Pr = 3.6 μC/cm2 and high induced polarization P = 26 μC/cm2 @ 522 kV/cm, and the coercive field Ec= 39 kV/cm. Electro-optical characterization of NKN/Pt/Si films has been performed using waveguide refractometry: a free-space coupling of a light beam into the thin-film waveguide modes. Intensity of TM- andTE-polarized light of 670 nm laser diode reflected from the free surface of NKN film and Au-cladding NKN/Pt/Si waveguide was recorded at zero and 30 V (100 kV/cm) bias electric field. Extraordinary and ordinary refractive indices as well as electro-optic coefficient have been determined by fitting these experimental data to the Fresnel formulas. Applying 160 V (530 kV/cm) across the parallel plate NKN capacitor (Ø= 2 mm, thickness 3 μm), modulation of the reflected light as high as 40% was achieved.

Characterization of the phase modulation property of a free-space electro-optic modulator by interframe intensity correlation matrix

2012 ◽  
Vol 51 (19) ◽  
pp. 4457 ◽  
Author(s):  
Huimin Yue ◽  
Lei Song ◽  
Zexiong Hu ◽  
Hongxiang Liu ◽  
Yong Liu ◽  
...  
Keyword(s):  
Free Space ◽  
Correlation Matrix ◽  
Phase Modulation ◽  
Intensity Correlation ◽  
Electro Optic ◽  
Electro Optic Modulator

Free-Space Electromagnetic Characterization of Materials for Microwave and Radar Applications

PIERS Online ◽  
2005 ◽  
Vol 1 (2) ◽  
pp. 128-132 ◽  
Author(s):  
Habiba Hafdallah Ouslimani ◽  
Redha Abdeddaim ◽  
Alain Priou
Keyword(s):  
Free Space ◽  
Radar Applications ◽  
Characterization Of Materials

Simultaneous measurement of orthogonal components of polarization in a free-space propagating terahertz signal using electro-optic detection

2011 ◽  
Vol 98 (15) ◽  
pp. 151104 ◽  
Author(s):  
M. B. Byrne ◽  
M. U. Shaukat ◽  
J. E. Cunningham ◽  
E. H. Linfield ◽  
A. G. Davies
Keyword(s):  
Simultaneous Measurement ◽  
Free Space ◽  
Electro Optic ◽  
Orthogonal Components ◽  
Terahertz Signal

Electrical and electro-optic characterization of nonlinear polymer thin films on silicon substrate

2014 ◽  
Author(s):  
Stefan Prorok ◽  
Marvin Schulz ◽  
Alexander Petrov ◽  
Manfred Eich ◽  
Jingdong Luo ◽  
...  
Keyword(s):  
Thin Films ◽  
Silicon Substrate ◽  
Polymer Thin Films ◽  
Electro Optic

Electro-Optic Sampler for Characterization of Devices in a Cryogenic Environment

1988 ◽  
pp. 1097-1104 ◽  
Author(s):  
Douglas R. Dykaar ◽  
Roman Sobolewski ◽  
James M. Chwalek ◽  
Thomas Y. Hsiang ◽  
Gerard A. Mourou
Keyword(s):  
Electro Optic

scholarly journals Design and Characterization of Traveling-wave Electrodes for InP-based Rectangular Mach-Zehnder High Speed Electro-optic Modulators

2017 ◽  
Vol 46 (5) ◽  
pp. 523002
Author(s):  
赵丽亚 ZHAO Li-ya ◽  
王乐 WANG Le ◽  
杨妍 YANG Yan ◽  
刘克 LIU Ke
Keyword(s):  
Traveling Wave ◽  
High Speed ◽  
Electro Optic
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