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浏览/检索结果: 共13条，第1-10条 帮助

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A nonparametric point-by-point method to measure time-dependent frequency in wavelength modulation spectroscopy 期刊论文  OAI收割
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2025, 卷号: 324, 页码: 11
作者:  Li, Renjie;  Li, Jing;  Song, Ziyu;  He, Dong;  Li, Fei
  |  收藏  |  浏览/下载：31/0  |  提交时间：2024/10/08
Simultaneous Control of Absorbing Frequency and Amplitude Using Graphene Capacitor and Active Frequency Selective Surface 期刊论文  OAI收割
IEEE Transactions on Antennas and Propagation, 2020, 卷号: 69, 期号: 3, 页码: 1793-1798
作者:  Cheng Huang;  Jiakun Song;  Chen Ji;  Jianing Yang;  Xiangang Luo
  |  收藏  |  浏览/下载：14/0  |  提交时间：2021/05/11
Wavelength-Tunable Ultra-Stable Optical Frequency Comb Based on All-Polarization-Maintaining Fiber Laser 期刊论文  OAI收割
FRONTIERS IN PHYSICS, 2020, 卷号: 8, 页码: 8
作者:  He, Xin;  Zhang, Pan;  Zhang, Yanyan;  Lin, Qimeng;  Guo, Hongyu
  |  收藏  |  浏览/下载：64/0  |  提交时间：2021/11/29
Broadband Polarization-Insensitive Tunable Absorber Using Active Frequency Selective Surface 期刊论文  OAI收割
IEEE Antennas and Wireless Propagation Letters, 2020, 卷号: 19, 期号: 6, 页码: 982-986
作者:  Zhao, Bo;  Huang, Cheng;  Yang, Jianing;  Song, Jiakun;  Guan, Chunlin
  |  收藏  |  浏览/下载：59/0  |  提交时间：2021/05/11
Broadband and Tunable Radar Absorber Based on Graphene Capacitor Integrated with Resistive Frequency-Selective Surface 期刊论文  OAI收割
IEEE Transactions on Antennas and Propagation, 2020, 卷号: 68, 期号: 3, 页码: 2446-2450
作者:  Song, Jiakun;  Huang, Cheng;  Yang, Jianing;  Zhang, Xu;  Peng, Jinqiang
  |  收藏  |  浏览/下载：57/0  |  提交时间：2021/05/11
Tunable output-frequency filter algorithm for imaging through scattering media under LED illumination 期刊论文  OAI收割
OPTICS COMMUNICATIONS, 2018, 卷号: 410, 页码: 160-163
作者:  Zhou, Meiling;  Singh, Alok Kumar;  Pedrini, Giancarlo;  Osten, Wolfgang;  Min, Junwei
  |  收藏  |  浏览/下载：36/0  |  提交时间：2018/12/12
A Frequency Reconfigurable Directive Antenna With Wideband Low-RCS Property 期刊论文  OAI收割
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2016, 卷号: 64, 期号: 3, 页码: 1173-1178
作者:  Huang, Cheng;  Pan, Wenbo;  Ma, Xiaoliang;  Luo, Xiangang
收藏  |  浏览/下载：28/0  |  提交时间：2016/06/27
Tunable femtosecond laser in the visible range with an intracavity frequency-doubled optical parametric oscillator 期刊论文  OAI收割
CHINESE PHYSICS B, 2013, 卷号: 22, 期号: 5
Zhu, JF; Xu, L; Lin, QF; Zhong, X; Han, HN; Wei, ZY
收藏  |  浏览/下载：37/0  |  提交时间：2014/01/17
Compensation of moire fringe sinusoidal deviation in photoelectrical encoder based on tunable filter (EI CONFERENCE) 会议论文  OAI收割
2011 Symposium on Photonics and Optoelectronics, SOPO 2011, May 16, 2011 - May 18, 2011, Wuhan, China
作者:  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y.
收藏  |  浏览/下载：35/0  |  提交时间：2013/03/25
In order to improve the precision of the absolute photoelectrical encoder  a compensating method is put forward  which restrains the harmonics in moire fringe signal. After analyzing the relationship between the subdividing error and the sinusoidal index  a low-pass digital filter which can make the moire signal satisfy the need of 1024 subdivision is designed. Considering with the fundamental frequency varies with the rotating speed of encoder  the tunable filter is adopted  whose cutoff frequency is calculated according to the coarse information of the encoder. The simulating results show that the proposed method can improve the sinusoidal index  especially at high rotating speed. At last  the compensating algorithm is implemented in the terminal of satellite optical communication  which needs high resolution. The experimental results show indicate that the developed method is feasible. 2011 IEEE.  
Characteristics of ZnMgO-based metal-semiconductor-metal photodetectors (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Photoelectronic Imaging and Detection, September 9, 2007 - September 12, 2007, Beijing, China
作者:  Zhang J.;  Li B.;  Li B.;  Li B.;  Zhao Y.
收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25
In recent years  ZnMgO semiconductor alloys  with a direct bandgap tunable between 3.37 eV and 7.8 eV  become one of the most suitable materials for the fabrication of ultraviolet detectors. In this paper  we have fabricated metal-semiconductor-metal photodetectors on 1-m thick Zn 0.8Mg0.2O films. The interdigital metal electrodes are 500 m long and 5 m wide with an interelectrode spacing 2 m  5 m and 10 m  respectively. Zn0.8Mg0.2O films were grown on quartz by ratio frequency magnetron sputtering at 500C. Dark current  spectral responsivity and pulse response were carried out for the devices with different finger pitches. All the photodetectors showed the peak responsivity at 330 nm and the ultraviolet-visible rejection ratio (R330 nm/R400 nm) is more than four orders of magnitude at 3 V bias. For the device with 2 m finger pitch  the detectivity was calculated as 4.21011 cm Hz 1/2/W at 330 nm. Furthermore  the transient response measurement for all devices revealed similar rise time of 10 ns. The 90%-10% fall times are 130 ns  170 ns and 230 ns for the devices with different finger pitches of 2 m  5 m and 10 m  respectively..