Adaptive calibration system used for optical phased array beam scanning
An optical phased array and beam scanning technology, applied in radio wave measurement systems, instruments, etc., can solve the problem of not proposing a method for beam scanning calibration of optical phased array systems, and improve angular accuracy and energy utilization. Strength boosting effect
Active Publication Date: 2018-08-03
BEIHANG UNIV
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[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 used for optical phased array beam scanning, which belongs to the intersected technical field of applied optics, diffractive optics and adaptiveoptics. The system comprises a laser source, a polarization maintaining fiber, an optical phased array based on electro-optical modulation, a photodetector, an analog signal acquisition card, an electronically controlled slide rail, a control computer, an analog signal generator and an adaptive optimization algorithm. The laser source emits laser, and the laser is transmitted to the optical phasedarray through the polarization maintaining fiber. The photodetector detects light intensity at different positions on the electronically controlled slide rail, and transmits the light intensity to the analog signal acquisition card to convert the light intensity into a light intensity digital signal. The signal is transmitted to the control computer. The control computer controls the photodetector to sequentially move. Voltage applied to the optical phased array is calibrated to acquire corresponding optimal voltage distribution. According to the invention, full-automatic calibration of a large number of angles and a large number of arrays is realized, and the beam scanning angle accuracy and energy utilization rate of the optical phased array are improved.
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