A Traceable High-Accuracy Velocity Measurement by Electro-Optic Dual-Comb Interferometry

Xue, Bin; Zhang, Haoyun; Zhao, Tuo; Jing, Haoming

doi:10.3390/app9194118

Cited by 10 publications

(8 citation statements)

References 22 publications

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“…The proposed setup uses an optical power measurement scheme, i.e., as opposed to measurement of wavelength, and thus would be relatively cheaper when compared to the utilization of complex optical spectrum analyzers for the target application. Moreover, two additional research papers presented by Xie et al [4] and Xue et al [5] have also been categorized under the rubric "fiber optic sensing". For instance, Xie et al [4] reported the application of an integrated optical electric-field sensor on the measurements of transient voltages in AC high-voltage power grids.…”

Section: Fiber Optical Sensingmentioning

confidence: 99%

Editorial on Special Issue “Modern Applications in Optics and Photonics: From Sensing and Analytics to Communication”

2021

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Section: Fiber Optical Sensingmentioning

confidence: 99%

Editorial on Special Issue “Modern Applications in Optics and Photonics: From Sensing and Analytics to Communication”

2021

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“…Therefore, research on the measuring method of the projectile's velocity and how to improve the measuring accuracy of the projectile's velocity have always been the key contents in the field of the weapon's performance evaluation [5][6][7]. At present, the measuring methods of the projectile's velocity are mainly to use interval velocity measuring devices [8][9][10][11]. The laser screen velocity measuring (LSVM) system is a typical interval velocity measuring device.…”

Section: Introductionmentioning

confidence: 99%

Research on Target Deviation Measurement of Projectile Based on Shadow Imaging Method in Laser Screen Velocity Measuring System

Chu

Zhao

Liu

et al. 2020

Sensors

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In the laser screen velocity measuring (LSVM) system, there is a deviation in the consistency of the optoelectronic response between the start light screen and the stop light screen. When the projectile passes through the light screen, the projectile’s over-target position, at which the timing pulse of the LSVM system is triggered, deviates from the actual position of the light screen (i.e., the target deviation). Therefore, it brings errors to the measurement of the projectile’s velocity, which has become a bottleneck, affecting the construction of a higher precision optoelectronic velocity measuring system. To solve this problem, this paper proposes a method based on high-speed shadow imaging to measure the projectile’s target deviation, ΔS, when the LSVM system triggers the timing pulse. The infrared pulse laser is collimated by the combination of the aspherical lens to form a parallel laser source that is used as the light source of the system. When the projectile passes through the light screen, the projectile’s over-target signal is processed by the specially designed trigger circuit. It uses the rising and falling edges of this signal to trigger the camera and pulsed laser source, respectively, to ensure that the projectile’s over-target image is adequately exposed. By capturing the images of the light screen of the LSVM system and the over-target projectile separately, this method of image edge detection was used to calculate the target deviation, and this value was used to correct the target distance of the LSVM to improve the accuracy of the measurement of the projectile’s velocity.

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“…As the demands for high-speed and large bandwidth information processing are increasing, electro-optic (EO) devices such as modulators, sensors, deflectors, multipliers, switches, and spatial light modulators, which are developed using EO effect, are gaining important applications in data processing and signal transmission [1][2][3][4][5][6]. EO coefficients are quantitative parameters of the EO effect, their accurate measurements are the key for designing these EO devices, and a study on the dispersion of the EO coefficients is of great significance for designing the EO devices that are suitable for wide spectrum applications [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Dispersion Measurement of Electro-Optic Coefficient γ22 of Lithium Niobate Based on Photoelastic Modulation

Wang

Han

et al. 2020

Applied Sciences

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A novel method for determining the electro-optic (EO) coefficient γ 22 of lithium niobate and its dispersion using photoelastic modulation is presented. A spectroscopic polarimetry was constructed with the photoelastic modulator (PEM), and a monochromator was selected to automatically scan the wavelength of a light source. Phase retardation induced by an EO sample was loaded into the modulation signals to demodulate the EO coefficients. The PEM and data processing were controlled in the same field programmable gate array (FPGA), and the DC and harmonic terms were extracted simultaneously by employing digital phase-locked technology. An experimental system was built to analyze the principle of this scheme in detail. After the modulation phase retardation amplitude of the PEM was precisely calibrated, the EO coefficient γ 22 of a Y-cut lithium niobate crystal plate was measured in the spectral range from 0.42 to 0.8 µm. The experimental results demonstrated that the measurement sensitivity of the system was 1.1 × 10 − 14 m / V for a sampling time of 198.9 ms. Plotting the measured results against the light wavelength, the dispersion of the EO coefficients was obtained similar to the Cauchy dispersion formula γ 22 = 5.31 × 10 − 12 + 4.071 × 10 − 13 λ 2 + 7.184 × 10 − 14 λ 4 in the visible light range. This method is suitable for studying dispersion of the EO coefficients of crystals as well as of thin films and two-dimensional materials.

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A Traceable High-Accuracy Velocity Measurement by Electro-Optic Dual-Comb Interferometry

Cited by 10 publications

References 22 publications

Editorial on Special Issue “Modern Applications in Optics and Photonics: From Sensing and Analytics to Communication”

Editorial on Special Issue “Modern Applications in Optics and Photonics: From Sensing and Analytics to Communication”

Research on Target Deviation Measurement of Projectile Based on Shadow Imaging Method in Laser Screen Velocity Measuring System

Dispersion Measurement of Electro-Optic Coefficient γ22 of Lithium Niobate Based on Photoelastic Modulation

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