Microwave Photonic Link Based on Coherent Detection Using Low-Cost Free-Running Laser Sources Incorporating Optical Independent Sideband and Optical Orthogonal Modulation for 4×4 MIMO

2017 ◽  
Author(s):  
Xiang Chen ◽  
Jianping Yao
Keyword(s):  
Low Cost ◽  
Coherent Detection ◽  
Microwave Photonic ◽  
Free Running ◽  
Laser Sources ◽  
Orthogonal Modulation

Effect of the degree of phase-correlation of laser sources on the transmission and optical coherent detection in radio-over-fibre systems

2013 ◽  
Author(s):  
Ramón Maldonado-Basilio ◽  
Ran Li ◽  
Sawsan Abdul-Majid ◽  
Hamdam Nikkhah ◽  
Kin-Wai Leong ◽  
...  
Keyword(s):  
Coherent Detection ◽  
Phase Correlation ◽  
Laser Sources ◽  
Radio Over Fibre

Experimental demonstration of 100/40 Gb/s OFDM-PON with Bi-directional Low-cost Coherent Detection

2015 ◽  
Author(s):  
Y.N. Huang ◽  
M.Z. Mao ◽  
R.J. Lin ◽  
C.X. Kuang ◽  
R.R. Chen ◽  
...  
Keyword(s):  
Low Cost ◽  
Coherent Detection ◽  
Experimental Demonstration

EYESAFE ACTIVE IMAGING OF HARD TARGETS: AN OVERVIEW OF TECHNIQUES UNDER INVESTIGATION BY NVESD

2008 ◽  
Vol 18 (02) ◽  
pp. 375-391 ◽  
Author(s):  
BRADLEY W. SCHILLING ◽  
STEPHEN R. CHINN ◽  
BRIAN THOMAS ◽  
TIMOTHY J. SCHOLZ
Keyword(s):  
Target Identification ◽  
Imaging Techniques ◽  
Low Cost ◽  
Short Wave ◽  
Laser Radar ◽  
Ground Vehicles ◽  
Atmospheric Propagation ◽  
Active Imaging ◽  
Resolution Imaging ◽  
Laser Sources

The U.S. Army is actively pursuing 3D active imaging techniques using laser sources emitting at 1.5 μm. This eyesafe short wave infrared (SWIR) waveband is advantageous due to both the improved eye safety and atmospheric propagation through obscurants. NVESD has several active programs in this area, which will be reviewed in this paper. These are: 1) single-pixel scanned imaging laser radar, 2) 2D gated SWIR imaging, and 3) 3D-flash laser radar. These systems are being evaluated for various targeting scenarios, including as potential payloads on unmanned air-vehicles, ground vehicles and other sensor suites. Applications include low-cost long-range target identification, identification of heavily obscured targets, obstacle avoidance, and high resolution imaging.

scholarly journals Simultaneous Classical Communication and Quantum Key Distribution Based on Plug-and-Play Configuration with an Optical Amplifier

Entropy ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 333 ◽  
Author(s):  
Xiaodong Wu ◽  
Yijun Wang ◽  
Qin Liao ◽  
Hai Zhong ◽  
Ying Guo
Keyword(s):  
Quantum Key Distribution ◽  
Finite Size ◽  
Key Distribution ◽  
Optical Amplifier ◽  
Coherent Detection ◽  
Secret Key ◽  
Plug And Play ◽  
Classical Communication ◽  
Laser Sources ◽  
Simulation Results

We propose a simultaneous classical communication and quantum key distribution (SCCQ) protocol based on plug-and-play configuration with an optical amplifier. Such a protocol could be attractive in practice since the single plug-and-play system is taken advantage of for multiple purposes. The plug-and-play scheme waives the necessity of using two independent frequency-locked laser sources to perform coherent detection, thus the phase noise existing in our protocol is small which can be tolerated by the SCCQ protocol. To further improve its capabilities, we place an optical amplifier inside Alice’s apparatus. Simulation results show that the modified protocol can well improve the secret key rate compared with the original protocol whether in asymptotic limit or finite-size regime.

Research on Double Laser Sources Location System Based on Incremental PID Algorithm

2013 ◽  
Vol 401-403 ◽  
pp. 1623-1627
Author(s):  
Ya Hui Luo ◽  
Ping Jiang ◽  
Wen Wu Hu
Keyword(s):  
High Precision ◽  
Paddy Field ◽  
Low Cost ◽  
Emission Angle ◽  
Location System ◽  
Pid Algorithm ◽  
Automatic Driving ◽  
Small Machine ◽  
Laser Sources ◽  
Laser Emitter

Precision location technology is one of basic technologies to realize the farmland working machine automatic driving and prescription agriculture; it is an important content of modern intelligent agricultural machinery research. In order to study a low-cost and high-precision location system which can be applied in the small machine worked in the south paddy field, the study proposed a double laser sources location technology. With the known distance between two laser emitter, the dynamic emission angle of laser emitter can be acquired and the location coordinate of the moving machine can be accumulated. Then the real-time coordinate information and moving attitude also can be obtained. It lays a foundation for unmanned working machine and data acquisition from fixed-point in the paddy field. First, the principle of laser location was introduced in the paper, and it focused on the design of mechanical structure and controlling unit. Then, the automatic tracking and location experiment was carried when the system was fixed on the rice transplanter. And the experiment shows, the distance shifting of tracking curve is less than 7cm in the measurement of 100m, and the advantage of the high precision, low cost and high portability is very suitable for the location requirement of south farmland working machine.

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