An Adaptive Calibration System for Optical Phased Array Beam Scanning
An optical phased array and beam scanning technology, which is applied to radio wave measurement systems, instruments, etc., can solve the problems that there is no method for beam scanning calibration of optical phased array systems
Active Publication Date: 2021-09-21
BEIHANG UNIV
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Problems solved by technology
[0003] In the field of optical phased array beam scanning, the existing technology mainly solves the problem of realizing beam scanning for an optical phased array system with known parameters, and does not propose a method for beam scanning calibration of an optical phased array system with unknown system parameters. method
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[0016] The technical solutions of the present invention will be further described in detail in conjunction with the accompanying drawings and examples.
[0017] In order to overcome the error in optical phased array beam scanning, the invention proposes an adaptive calibration system for optical phased array scanning. Such as figure 1 As shown, the system includes laser light source 1, polarization-maintaining optical fiber 2, optical phased array array based on electro-optic modulation 3, electronically controlled slide rail 4, photodetector 5, analog signal acquisition card (A / D) 6, and control computer 7 and an analog signal generator (D / A) 8. Laser light source 1, polarization maintaining fiber 2 and optical phased array array 3 are the optical phased array system to be calibrated; electronically controlled slide rail 4 and photodetector 5 form an optical power detection system with adjustable position; A / D6, control Computer 7 and D / A8 form the signal processing and con...
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The invention discloses an adaptive calibration system for optical phased array beam scanning, which belongs to the cross technical fields of applied optics, diffractive optics and adaptive optics. The system includes laser light source, polarization maintaining fiber, optical phased array array based on electro-optic modulation, photodetector, analog signal acquisition card, electronic control slide rail, control computer, analog signal generator and adaptive optimization algorithm. The laser light source emits laser light, which is transmitted to the optical phased array array through the polarization-maintaining optical fiber; the photodetector detects the light intensity at different positions on the electronically controlled slide rail, and transmits it to the analog signal acquisition card to convert it into a digital signal of light intensity, and then transmits it to the control computer. The control computer controls the photodetectors to move sequentially, calibrates the voltage applied to the optical phased array array, and obtains the corresponding optimal voltage distribution. The invention can realize the automatic calibration work of a large number of angles and a large number of arrays, and improves the accuracy of the scanning angle of the optical phased array light beam and the energy utilization rate.
Description
technical field [0001] The invention belongs to the interdisciplinary technical fields of applied optics, diffractive optics and adaptive optics, and in particular relates to an adaptive calibration system for optical phased array beam scanning. Background technique [0002] The optical phased array realizes the non-mechanical scanning of the beam through the arrangement of the transmitting antenna and the independent control of the beam phase. Due to differences in production and processing and the consistency of the device itself in the actual optical phased array array, there will be certain errors in the antenna arrangement position of each actual phased array system, the photoelectric coefficient of the phase modulator and the theoretical value. Due to the existence of this error, when the optical phased array scans the light beam, the accuracy of the scanning angle and the utilization rate of light energy are not optimal. [0003] In the field of optical phased array ...
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IPC IPC(8): G01S7/497
CPCG01S7/497
Inventor 李立京陈文孙鸣捷宋来亮赵新宇郑月
Owner BEIHANG UNIV