North China Institute of Electronic Equipment

Beijing, China

North China Institute of Electronic Equipment

Beijing, China
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Han J.,Changchun University of Science and Technology | Sun H.,Changchun University of Science and Technology | Liu X.,Changchun University of Science and Technology | Wang T.,Changchun University of Science and Technology | And 5 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

A new method that adopt fiber laser phase array source to form all optics network in the deep space communication was proposed in this paper. The far-field light intensity figure of 1.55μm fiber laser phase array source was simulated, and the scanning range with changing among array components the phase was obtained. The number of array components was 3×3, wavelength was 1.55μm, and core radius was 10μ m. The scanning range was ± 0.9909° when the distance of array components was 80μm. It was found that applying fiber laser phase array source can achieve scanning advantages with dynamic range in the all optics network. © 2014 SPIE.


Ye Z.,Beijing University of Technology | Ye Z.,North China Institute of Electronic Equipment | Song H.,China North Vehicle Research Institute | Wang L.,North China Institute of Electronic Equipment | And 5 more authors.
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2011

This paper proposes an infrared diffusion imaging and multi-point calibration method to measure the far-field beam quality parameters of the high-power laser. The high-energy pulse laser spot's images are obtained with an imaging detector by laying the diffuse reflection target in far field. The pulse-width and peak power of the laser are measured using an energy detector which is put behind a hole at the center of the target plane. According to the energy calibration of the laser spot's images, the energy and power distribution, the total energy and the corresponding beam quality parameters of the far field high-energy pulse laser beam are attained. This method has been applied to measuring the parameters of a high-energy TEA CO2 laser. The measured cross-section radius of far-field beam was 80.2 mm and the divergence angle was 1.55 mrad.


Li F.,CAS Institute of Electronics | Li F.,University of Chinese Academy of Sciences | Wu J.,CAS Institute of Electronics | Zhao Z.,CAS Institute of Electronics | And 4 more authors.
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2012

Using optical heterodyne detection, an all-fiber laser Doppler vibrometer (LDV) was set up to investigate the air coupled vibration of scattering objects so as to recover the vibrating information of the source. Influence of the scattering object properties, such as materials, holdings, relative positions to the source, etc., on the response to the source vibration through air coupling was investigated by the LDV and the vibration frequency response curves ranging from 200 Hz to 2700 Hz for six scattering materials were obtained. Results show that in the case of air coupled vibration of scattering objects, the response vibration amplitude is generally bigger at higher frequency; and the vibration response curve is more affected by the material of the scattering object than by the holdings or relative positions of the scattering object.


Qin M.,Guangxi University of Science and Technology | Qin M.,University of Science and Technology of China | Yang K.,University of Science and Technology of China | Yang K.,CAS Beijing Institute of Applied Physics And Computational Mathematics | And 4 more authors.
Vacuum | Year: 2015

The effects of a tiny misalignment of the inner rod in a coaxial-gyrotron on the eigenvalue, quality factor Q, resonant frequency, and electronic efficiency are investigated. As a practical application, with the electronic velocity spread and cavity wall resistivity being taken into account, the beam-wave interaction of a 170 GHz MW coaxial-gyrotron operating with TE31,12 mode has been studied. The results show that the eigenvalue of the operating mode decreases slightly when the ratio of misalignment to outer radius D/R increases for the case of smaller values of the ratio of outer to inner radius C = R/Rin, but is unchanged with the increasing value of D/R for the case of large ratio of C. The electronic efficiency decrease slightly when D/R increases within the range of 0-0.015. However it decreases at a faster rate when D/R is larger than 0.015. If D/R increases to 0.024, the efficiency decreases sharply to only about 2.2%. For both cold and hot cavity, the resonant frequency decreases slightly with D/R increasing. © 2015 Elsevier Ltd. All rights reserved.


Qin M.,University of Science and Technology of China | Luo Y.,University of Science and Technology of China | Yang K.,University of Science and Technology of China | Yang K.,CAS Beijing Institute of Applied Physics And Computational Mathematics | And 3 more authors.
IEEE Transactions on Electron Devices | Year: 2014

The effects of a small misalignment of the inner rod in a corrugated coaxial-gyrotron on eigenvalue, resonant frequency, and electronic efficiency, and so forth, are presented. As a practical application, with the electronic velocity spread and cavity wall resistivity being taken into account, the beam-wave interaction of a 170 GHz megawatt corrugated coaxial-gyrotron operating with TE-{31,12} mode has been investigated. The results show that the eigenvalue increases slightly when the ratio of misalignment to outer radius D/R increases in the case of small ratio of outer to inner radius C= R/R-{\rm {in}} , but is uniform in the case of large ratio of C. The electronic efficiency decrease slightly when D/R increases within the range of 0-0.01. If D/R increases to 0.02, the efficiency decreases seriously to only about 5%. For both cold cavity and hot cavity, the resonator frequency increases with D/R increasing. © 1963-2012 IEEE.

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