Prof. Shaojun Du Profile

Prof. Shaojun Du

at National Univ of Defense Technology

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Author

Publications (22)

Proceedings Article | 21 March 2023 Paper

Generating the optical vortex array based on a coherent phased array

Jiayi Zhang, Jinhu Long, Hongxiang Chang, Rongtao Su, Yanxing Ma, Pengfei Ma, Shaojun Du, Pu Zhou

Proceedings Volume 12595, 1259509 (2023) https://doi.org/10.1117/12.2666961

KEYWORDS: Spiral phase plates, Phased array optics, Phased arrays, Optical vortices, Optical coherence, Optical arrays, Numerical simulations, Fiber lasers, Phase distribution

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Proceedings Article | 18 June 2021 Paper

The influence of cooling temperature on the thermal mode instability in the Yb-doped fiber oscillator

Jinming Wu, Qiong Gao, Hanwei Zhang, Peng Wang, Xiaolin Wang, Baolai Yang, Chen Shi, Xiaoming Xi, Pu Zhou, Shaojun Du

Proceedings Volume 11850, 1185010 (2021) https://doi.org/10.1117/12.2599696

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Proceedings Article | 5 November 2020 Paper

Design of a 1×K wavelength selective switch based on TEC fiber array in curved alignment

Hua Jialun, Zhujun Wan, Shaojun Du

Proceedings Volume 11569, 115690A (2020) https://doi.org/10.1117/12.2579649

KEYWORDS: Switches, Optical simulations, Liquid crystal on silicon, Diffraction, Diffraction gratings, Zemax, Switching, Solids, Silicon

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Proceedings Article | 18 December 2019 Paper

Resolution analysis of focused plenoptic camera with four types focal lengths

Jiahua Wang, Xuanzhe Zhang, Shaojun Du, Qingsong Liu, Jun Li, Yan Wang, Honggang Xiang

Proceedings Volume 11335, 1133504 (2019) https://doi.org/10.1117/12.2540199

KEYWORDS: Cameras, Microlens, Sensors, Image resolution, Image sensors, Imaging systems, Optical design, Diffraction, Microlens array

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Proceedings Article | 24 October 2017 Paper

Measurement of the wavefront distribution characteristics of a 400-1700nm supercontinuum light source

Dun Li, Chenghai Zhao, Wuming Wu, Shaojun Du

Proceedings Volume 10457, 104571W (2017) https://doi.org/10.1117/12.2284638

KEYWORDS: Wavefronts, Light sources, Wavefront sensors, Sensors

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Proceedings Article | 26 June 2017 Paper

Real-time aberration correction simulation of multimode beam by SPGD algorithm

Qiong Zhou, Wenguang Liu, Baozhu Yan, Quan Sun, Shaojun Du

Proceedings Volume 10335, 103351L (2017) https://doi.org/10.1117/12.2270470

KEYWORDS: Stochastic processes, Distortion, Control systems, Diffraction, Aberration correction, Imaging systems, Computer simulations, Optical simulations, Liquid crystals, Phase measurement, Data corrections, Fiber lasers, Thermal effects, Beam controllers

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Proceedings Article | 26 June 2017 Paper

Uncertainty analysis of optical components absorption coefficient measurement using an intra-cavity device

Baozhu Yan, Wenguang Liu, Qiong Zhou, Shaojun Du, Yi Yang

Proceedings Volume 10329, 103294E (2017) https://doi.org/10.1117/12.2270584

KEYWORDS: Reflectivity, Laser irradiation, Absorption, Optical components, Mirrors, Uncertainty analysis, High power lasers, Chemical lasers, Optical coating design

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In order to measure the absorption coefficient and performance degradation characteristics of optical components which used in high power laser system, an intra-cavity device was established based on a discharge-drived CW chemical laser. Two pieces of 45 degree reflecting mirrors were tested. Each mirror was tested for more than twenty times, and high power laser irradiation on the testing mirrors lasted 100 seconds continuously in each test. The dependence of absorption coefficients on irradiation times was acquired. The testing results of both reflecting mirrors showed that, the differences between the experimental absorption coefficients and their fitting curve were up to 30.7% and 21.6% respectively, and the differences were independent of irradiation condition, such as irradiation energy, irradiation power and beam crosssectional area. The uncertainty of absorption coefficient was composed of two parts. For one thing, the uncertainty of the direct measurement results, such as the temperature rise of optical components, can cause the uncertainty of absorption coefficients. This part of uncertainty was about 11.3%. For another, the resonant cavity need to be adjusted again when other optical components were replaced, which lead to the change of the incident angle of the optical components to be measured. A typical film system of 24 layers (12 pairs) was calculated by Thin Film Design Software called TFCalc, which showed the absorption coefficients increased with the increase of incident angle. When the angle of incidence was 0.5 degree from the design value, there would be -60~71ppm difference of absorption coefficient from the original one, and the uncertainty was 14.5%. When there was a deviation of 1 degree, the difference of absorption coefficient and the uncertainty were -112~155ppm and 31.7% respectively. This results showed that, the deviation of incident angle was between 0.5~1 degree in the test. In order to reduce the testing uncertainty of absorption coefficients, the deviation between the incident angle of optical components and the design value should be reduced as much as possible. This provides guidance for measuring the absorption coefficients of optical components with an intra-cavity device.

Proceedings Article | 26 June 2017 Paper

Phase retrieval technology within a single shot using multi-focal lengths chromatic aberration system

Yi Yang, Xuanzhe Zhang, Shaojun Du, Qiong Zhou, Quan Sun

Proceedings Volume 10330, 103301T (2017) https://doi.org/10.1117/12.2270401

KEYWORDS: Phase retrieval, Chromatic aberrations, Optical phase space, Lens design, Cameras, Numerical simulations, Atmospheric optics

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Proceedings Article | 26 June 2017 Paper

Ghosting images processing methods for dynamic aberration detection in imaging systems

Yi Yang, Quan Sun, Xuanzhe Zhang, Shaojun Du, Baozhu Yan

Proceedings Volume 10335, 103351Z (2017) https://doi.org/10.1117/12.2270094

KEYWORDS: Imaging systems, Optical components, Stray light, Environmental sensing, Wavefront aberrations, Detection and tracking algorithms, Convolution, Wavefront sensors, Image processing, Digital signal processing

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Proceedings Article | 26 June 2017 Paper

Modeling on Bessel beam guide star beacon for wavefront sensing

Quan Sun, Ruiyao Luo, Yi Yang, Wuming Wu, Shaojun Du, Yu Ning

Proceedings Volume 10330, 103301S (2017) https://doi.org/10.1117/12.2270391

KEYWORDS: Bessel beams, Wavefront sensors, Optical simulations, Image quality, Turbulence, Wave propagation, Laser guide stars, Detection and tracking algorithms, Sensors, Laser scattering, Scattering, Atmospheric optics

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Proceedings Article | 26 June 2017 Paper

Adding polarimetric imaging to depth map using improved light field camera 2.0 structure

Xuanzhe Zhang, Yi Yang, Shaojun Du, Yu Cao

Proceedings Volume 10335, 103351Q (2017) https://doi.org/10.1117/12.2270144

KEYWORDS: Cameras, Polarization, Polarimetry, Imaging arrays, 3D acquisition, 3D image processing, Image resolution, Wavefronts, Imaging systems, Navigation systems, Target recognition, Charge-coupled devices, Glasses, Eye

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Proceedings Article | 19 October 2016 Paper

Actuators of 3-element unimorph deformable mirror

Tianyang Fu, Yu Ning, Shaojun Du

Proceedings Volume 10154, 1015424 (2016) https://doi.org/10.1117/12.2247414

KEYWORDS: Deformable mirrors, Actuators, Electrodes

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Proceedings Article | 19 October 2016 Paper

High accuracy phase retrieval method research based on Shack-Hartmann wavefront sensor

Wenhua Zeng, Yang Lv, Haotong Ma, Yu Ning, Shaojun Du

Proceedings Volume 10154, 101541D (2016) https://doi.org/10.1117/12.2246793

KEYWORDS: Wavefront sensors, Phase retrieval

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Proceedings Article | 14 May 2015 Paper

Thermal distortion real-time detection and correction of a high-power laser beam-splitter mirror based on double Shack-Hartmann wavefront sensors

Yu Ning, Quan Sun, Hongyan Wang, Wuming Wu, Shaojun Du, Xiaojun Xu

Proceedings Volume 9513, 95130Y (2015) https://doi.org/10.1117/12.2176741

KEYWORDS: Adaptive optics, Wavefront sensors, Sensors, Distortion, Mirrors, Data fusion, High power lasers, Detection and tracking algorithms, Beam splitters, Wavefronts

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Proceedings Article | 12 May 2015 Paper

Research on thermal effects of beam-splitter mirror in high-power laser system

Quan Sun, Yu Ning, Zongfu Jiang, Wenguang Liu, Shaojun Du

Proceedings Volume 9513, 951318 (2015) https://doi.org/10.1117/12.2179234

KEYWORDS: Mirrors, Thermal effects, Crystals, Absorption, Laser energy, Spinel, Reflection, High power lasers, 3D modeling, Distortion

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Proceedings Article | 5 May 2015 Paper

Application research in nonuniformity correction algorithm of IRFPA for infrared measuring system

Yi Yang, Baihong Shu, Chengdong Zhang, Shaojun Du

Proceedings Volume 9506, 950624 (2015) https://doi.org/10.1117/12.2178895

KEYWORDS: Infrared imaging, Nonuniformity corrections, Infrared radiation, Sensors, Linear filtering, Infrared cameras, Thermography, Artificial neural networks, Optical filters, Cameras

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Proceedings Article | 5 May 2015 Paper

3D imaging of translucent media with a plenoptic sensor based on phase space optics

Xuanzhe Zhang, Bohong Shu, Shaojun Du

Proceedings Volume 9506, 95061U (2015) https://doi.org/10.1117/12.2178349

KEYWORDS: Sensors, Translucency, Stereoscopy, Optical phase space, Transparency, Light, Fourier transforms, Atmospheric optics, Imaging technologies, Spherical lenses

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Proceedings Article | 22 August 2014 Paper

A new phase retrieval algorithm based on multi-layered intensity distribution

Shaojun Du, Xuanzhe Zhang, Baihong Shu

Proceedings Volume 9148, 91485N (2014) https://doi.org/10.1117/12.2057681

KEYWORDS: Phase retrieval, Fourier transforms, Argon, Wavelet transforms, Optical phase space, Wavelets, Zoom lenses, Fractional fourier transform, Chromium, Light wave propagation

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Proceedings Article | 19 August 2014 Paper

Wavefront detection of extended-beacon based on phase-space optics

Xuanzhe Zhang, Baihong Shu, Shaojun Du

Proceedings Volume 9151, 915126 (2014) https://doi.org/10.1117/12.2057530

KEYWORDS: Optical phase space, Image quality, Light, Atmospheric optics, Astronomy, Spatial resolution, Fourier transforms, Image enhancement, Image resolution, Cameras

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Proceedings Article | 24 July 2014 Paper

Analysis of turbulent atmospheric anisoplanatism influence on adaptive optics system over horizontal path

Quan Sun, Yu Ning, Baihong Shu, Shaojun Du

Proceedings Volume 9148, 91484W (2014) https://doi.org/10.1117/12.2055828

KEYWORDS: Adaptive optics, Turbulence, Atmospheric propagation, Laser beam propagation, Wave propagation, Atmospheric modeling, Atmospheric optics, Optical simulations, Telescopes, Diffraction

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Proceedings Article | 19 September 2013 Paper

Phase retrieval based on the Wigner distribution

Wenda Cui, Shaojun Du

Proceedings Volume 8905, 89051C (2013) https://doi.org/10.1117/12.2034030

KEYWORDS: Phase retrieval, Electronic filtering, Interference (communication), Diffraction, Fourier transforms, Radio optics, Optoelectronics, Defense technologies, Numerical simulations, Radiometry

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Proceedings Article | 5 November 2010 Paper

Simulated annealing algorithm applied in adaptive near field beam shaping

Zhan Yu, Hao-tong Ma, Shao-jun Du

Proceedings Volume 7848, 78480Q (2010) https://doi.org/10.1117/12.871683

KEYWORDS: Algorithms, Beam shaping, Near field, Zernike polynomials, Evolutionary algorithms, Control systems, Diffraction, Laser applications, Laser systems engineering, Annealing

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Showing 5 of 22 publications

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