Mr. Yanjun Sun Profile

Yanjun Sun

at Changchun Univ of Science and Technology

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Publications (3)

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SPIE Journal Paper | 28 July 2018

Research on optically controlled active surface filtering technology

Jun Wang, Yanjun Sun, Fengyan Du, Xue-song Ji, Li Wang, Yue Wang, Yanbing Leng

OE, Vol. 57, Issue 07, 077105, (July 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.7.077105

KEYWORDS: Thin films, Active optics, Optical filters, Filtering (signal processing), Metals, Annealing, Resistance, Crystals, Doping, Optical engineering

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In order to realize the application of active surface filtering technology in an optical window, an optically controlled active surface filtering technology is proposed. Photoelectrically conductive thin-film photovoltaic effect is used to control the dimensional change of the metal frequency-selective surface (FSS), thereby achieving active control of surface filtering. Starting from the theory, the principle of active surface filtering technology is described. CST software is used to simulate the FSS characteristics of two types of metal FSSs, “cross” bandpass type and “Jerusalem” band-stop type, under light irradiation conditions. The results show that the filter center frequency is changed from 23 and 13 GHz to 27.6 and 9.8 GHz, respectively, with the change of the structure size. In this experiment, the cross bandpass type and Jerusalem band-stop type optically controlled active FSS are, respectively, fabricated by coating, etching, and electron beam evaporation techniques. With annealing temperature of 750°C and the annealing time of 300 s, it gets the best optoelectronic performance. The experimental results are that the sensitive wavelength of photoconductive thin film is 0.6 μm and the optimal illumination power is 150 mW / cm2. The sample filter center frequency is changed from 23.8 and 13.5 GHz to 28 and 10.5 GHz, respectively, which is basically consistent with the simulation results. This paper concludes that the use of light control can realize active control of surface filtering.

Proceedings Article | 16 August 2017 Open Access

Photoelectric professional students in common universities cultivate way to explore under the background of professional certification

Yan-jun Sun, Li Wang, Yan-bing Leng

Proceedings Volume 10452, 104523V (2017) https://doi.org/10.1117/12.2264601

KEYWORDS: Optoelectronics, Information science, Engineering education

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In view of the engineering education professional certification of specialty construction and the specific requirements of the training system, combining with our school optoelectronic information science and engineering characteristics, analysis of the optoelectronic information science and engineering in our school problems and challenges, to locate the specific professional training objectives. From the service oriented industry demand for talent ability, at the same time, according to the ministry of education professional norms of the development of the photoelectric teaching steering committee, and the professional development and the characteristics of target, to build a set to conform to the goal of cultivating the professional curriculum system. At the same time set up a from fundamental to professional practice teaching system, covers the course experiment, course design, case teaching, comprehensive training, such as graduation design practice. Which implements a whole ability training from the practice of foundation to high-end chain, embodies the training goal emphasize "outstanding practical skills, quality education is distinct culture characteristic. By further speed up the professional construction, professional certification standards to standardize our training process, improved the level of professional training, and improve the comprehensive quality of the graduates and talent of social competitiveness, fostered more professional talents for the country.

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Proceedings Article | 19 October 2016 Paper

Study of cylindrical optical micro-structure technology used in infrared laser protection

Yanjun Sun, Shunrui Liu, Zhining Wang, Yixuan Zhao, Boqi Wu, Yanbing Leng, Li Wang

Proceedings Volume 10154, 101540E (2016) https://doi.org/10.1117/12.2244948

KEYWORDS: Infrared lasers, Laser optics

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The paper aimed at the problem that strong absorption in visible wavelengths and equipment or operator injury caused by specular reflection exist in infrared laser protection technology to propose an infrared laser non-specular reflection optical micro-structure formed from optical window surface. It has the function of little effect on visible light transmission and large-angle scattering to 1064nm infrared laser in order to enable laser protection. The paper uses light track method to design double-side micro-cylindrical lens arrays with dislocation construction. Array period T and curvature radius of lens units R should meet the condition:0<lt; T< R/ 2√7. Virtual-Lab optical modeling software is applied for the simulation of designed cylindrical micro-structure, the simulation results: average transmittance rate of visible light drops 7% ,which has little impact on practical result, and we can make it up by visible wavelengths fabrication antireflection coating; 1064nm infrared laser reflection is about 75%, divergence angle is greater than 30%,which greatly reduces the single-directivity reflection echo energy of laser to achieve the purpose of laser protection.

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