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

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.

Characterization of an ADP electro-optic modulator in the near-IR

1990 ◽  
Author(s):  
Indu F. Saxena ◽  
Roy B. Torbert ◽  
James C. Vandiver
Keyword(s):  
Near Ir ◽  
Electro Optic ◽  
Electro Optic Modulator

A high-speed GaAs-based electro-optic modulator for polarization, intensity, and phase modulation

2013 ◽  
Author(s):  
Hiroshi Kato ◽  
Jeffrey D. Bull ◽  
Benjamin P. C. Tsou ◽  
Nicolas A. F. Jaeger
Keyword(s):  
Phase Modulation ◽  
High Speed ◽  
Electro Optic ◽  
Electro Optic Modulator

Preparation and Characterization of a Polymeric Bulk Electro-Optic Modulator

1997 ◽  
Vol 37 (3-4) ◽  
pp. 217-235 ◽  
Author(s):  
J. Ramírez-niño ◽  
A. Lopez-mancilla ◽  
C. Perez-abad ◽  
J. H. Rodaiguez ◽  
L. Rejon ◽  
...  
Keyword(s):  
Electro Optic ◽  
Electro Optic Modulator

Self-Mixing Interferometer Based on Four-Bucket Integration Technique for Micro-Displacement Measurement

2008 ◽  
Vol 381-382 ◽  
pp. 53-56
Author(s):  
Dong Mei Guo ◽  
Ming Wang
Keyword(s):  
Phase Modulation ◽  
Signal Analysis ◽  
External Cavity ◽  
Laser Cavity ◽  
Interference Signal ◽  
Analysis Method ◽  
Integration Technique ◽  
Electro Optic ◽  
Signal Analysis Method ◽  
Electro Optic Modulator

A novel self-mixing interference signal analysis method is proposed based on the use of an electro-optic modulator (EOM). Self-mixing interference occurs in the laser cavity by reflecting the light from a mirror-like target in front of the laser. Sinusoidal phase modulation of the beam is obtained by an EOM in the external cavity. The phase of the interference signal is calculated by four-bucket integration technique. The interferometer is applied to measure the displacement of a high-precision commercial PZT with an accuracy of a few nanometers.

A high-speed retro-reflector for free-space communication based on electro-optic phase modulation

2003 ◽  
Vol 81 (4) ◽  
pp. 639-650 ◽  
Author(s):  
T Mikaelian ◽  
M Weel ◽  
A Kumarakrishnan ◽  
P R Battle ◽  
R C Swanson
Keyword(s):  
Laser Beam ◽  
Free Space ◽  
Phase Modulation ◽  
High Speed ◽  
Signal To Noise Ratio ◽  
Heterodyne Detection ◽  
Space Communication ◽  
Electro Optic ◽  
Beam Incident ◽  
Free Space Communication

We demonstrate that an electro-optic phase modulator (EOM) can be used as a constituent of a corner-cube-based modulated high-speed retro-reflector. We performed experiments to investigate the efficiency of the phase modulation produced by an EOM as a function of the angle of a laser beam incident on it. Our experiments demonstrate that the field of view of the EOM is determined by its dimensions and the diameter of the laser beam. This suggests that the device may be suitable for applications involving high-speed (GHz), free-space communication. In these applications, the retro-reflector can be mounted on a moving platform such as a satellite. We find that it is possible to detect the retro-reflected signal with an adequate signal-to-noise ratio using heterodyne detection. We also discuss some practical considerations necessary for the implementation of such a device. PACS Nos.: 42.60.–V, 42.62.Cf, 42.62.Fi, 42.79.Sz, 42.79.Hp

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