Far Field Analysis of Fiber Laser Phased Array for Free-Space Communication

Zhao, Sisi; Ye, Zheng-yu; Yang, Der‐Ching; Wang, Zhiyong

doi:10.1109/sopo.2011.5780633

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…1, by applying appropriate voltages to the electrodes of OPA, a linear phase slope can be obtained across the array, and the beam can be steered [5]. The far-field radiation of the beam can be regarded as product of diffraction factor and interference factor [11]- [12].…”

Section: Model Of Opamentioning

confidence: 99%

“…OPA is widely used in raster scanning imaging [1], optical communication [2] and adaptive optics [3] due to its non-inertia and high speed [4], since Meyer [5] completed the first verification of optical phased array (OPA) at 1972. OPA related researches include large-scale array [6]- [8], high-power synthesis [9], large steering angle [10], sidelobes, grating lobes [11]- [12], parameters estimation and calibration [13]- [16].…”

Section: Introductionmentioning

confidence: 99%

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Fast Optical Phased Array Calibration Technique for Random Phase Modulation LiDAR

Chen

Zhao

et al. 2019

IEEE Photonics J.

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Optical phased array (OPA) imaging technique, which uses electro-optic modulation to achieve beam steering rather than mechanical scanning, is a raster scanning imaging method with great potential due to its noninertia and high speed. However, fabrication imperfection of an OPA causes pre-designed phase modulations not yielding desired steering angles, and a time-consuming calibration is usually required before practical use. Alternatively, it is possible to obtain images with a random phase modulation OPA. In this paper, we propose a fast calibration for the random phase modulation OPA LiDAR. Experimental results demonstrate that, to obtain images of the same quality, the proposed calibration is three times faster than the calibration used in raster scanning scheme. In the meantime, the proposed calibration simultaneously retrieves the point spread function of the imaging system during the process, which can be used to remove the image blurring caused by the sidelobes and further improve the image quality.

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Section: Model Of Opamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fast Optical Phased Array Calibration Technique for Random Phase Modulation LiDAR

Chen

Zhao

et al. 2019

IEEE Photonics J.

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Accurate calculation method of terrain viewshed for wireless signal as line of sight

Wang,

Dou

2024

Transactions in GIS

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Viewshed analysis is an important research content of digital terrain analysis. The terrain viewshed refers to the range that can be seen at the current position, which varies with the nature of the observer. When the observer is a wireless signal tower, it is the communication viewshed, which refers to the area consisted of grid cells where the receiving antennas can receive the signals from a transmitting antenna set up on a grid cell of terrain. The core of base station location problem includes two aspects: combinatorial optimization and the calculation of the coverage rate of signal. The calculation of communication viewshed is an important research content for determining signal coverage range. In this article, we propose an accurate communication viewshed computation algorithm for wireless signal (CVCWS) using the projection curve of 3D Fresnel zone analysis based on DEM. The CVCWS method can calculate the signal reception quality at different locations more precisely. Besides, a signal attenuation model is proposed to compute the theoretical attenuation value according to the signal receiving quality index. The proposed algorithm is compared with the existing DEM‐based communication viewshed algorithms, and the theoretical attenuation values are compared with the measured values. The experimental results show that the theoretical values gained by the CVCWS algorithm are close to the measured values, indicating high accuracy of the CVCWS algorithm. The proposed method can provide theoretical support for communication tower location planning and other related applications.

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A new method for all optical space network based on fiber laser phase array technology

et al. 2014

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A new method that adopt fiber laser phase array source to form all optics network in the deep space communication was proposed in this paper. The far-field light intensity figure of 1.55μm fiber laser phase array source was simulated, and the scanning range with changing among array components the phase was obtained. The number of array components was 3×3, wavelength was 1.55μm, and core radius was 10 μ m. The scanning range was ± 0.9909°when the distance of array components was 80μm. It was found that applying fiber laser phase array source can achieve scanning advantages with dynamic range in the all optics network.

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Far Field Analysis of Fiber Laser Phased Array for Free-Space Communication

Cited by 4 publications

References 7 publications

Fast Optical Phased Array Calibration Technique for Random Phase Modulation LiDAR

Fast Optical Phased Array Calibration Technique for Random Phase Modulation LiDAR

Accurate calculation method of terrain viewshed for wireless signal as line of sight

A new method for all optical space network based on fiber laser phase array technology

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