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浏览/检索结果: 共9条,第1-9条 帮助

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Dynamics of Dark Pulse Affected by Higher-Order Effects in Microresonators 期刊论文  OAI收割
IEEE PHOTONICS JOURNAL, 2023, 卷号: 15, 期号: 1
作者:  
Shi, Wenmi;  Li, Zhiheng;  Fan, Xuening;  Sun, Qiyuan;  Liu, Mulong
  |  收藏  |  浏览/下载:28/0  |  提交时间:2023/02/22
Low-Threshold 4/5 Octave-Spanning Mid-Infrared Frequency Comb in a LiNbO3 Microresonator 期刊论文  OAI收割
IEEE Photonics Journal, 2019, 卷号: 11, 期号: 6, 页码: 6603407
作者:  
Fan Weichen (范炜晨);  Lu Zhizhou (卢志舟);  Li Wei (李炜);  Wang Xinyu (王信宇);  Zhou Mengyao (周梦瑶)
  |  收藏  |  浏览/下载:131/0  |  提交时间:2019/12/24
Advanced astigmatism-corrected tandem Wadsworth mounting for small-scale spectral broadband imaging spectrometer (EI CONFERENCE) 会议论文  OAI收割
作者:  
Lin G.-Y.
收藏  |  浏览/下载:35/0  |  提交时间:2013/03/25
Tandem gratings of double-dispersion mount make it possible to design an imaging spectrometer for the weak light observation with high spatial resolution  high spectral resolution  and high optical transmission efficiency. The traditional tandem Wadsworth mounting is originally designed to match the coaxial telescope and large-scale imaging spectrometer. When it is used to connect the off-axis telescope such as off-axis parabolic mirror  it presents lower imaging quality than to connect the coaxial telescope. It may also introduce interference among the detector and the optical elements as it is applied to the short focal length and small-scale spectrometer in a close volume by satellite. An advanced tandem Wadsworth mounting has been investigated to deal with the situation. The Wadsworth astigmatism-corrected mounting condition for which is expressed as the distance between the second concave grating and the imaging plane is calculated. Then the optimum arrangement for the first plane grating and the second concave grating  which make the anterior Wadsworth condition fulfilling each wavelength  is analyzed by the geometric and first order differential calculation. These two arrangements comprise the advanced Wadsworth mounting condition. The spectral resolution has also been calculated by these conditions. An example designed by the optimum theory proves that the advanced tandem Wadsworth mounting performs excellently in spectral broadband. 2012 Optical Society of America.  
Design of reimaging F/1.0 long-wavelength infrared optical system (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者:  
Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载:36/0  |  提交时间:2013/03/25
A reimaging F/1.0 long-wavelength infrared optical system is proposed. The design has a flexible opto-mechanical layout. The design process is as follows. Firstly  the catadioptric reimaging system consists of two reflecting mirrors and a relay lenses. Two reflecting mirrors make up of the first imaging system and are therefore free of chromatic aberrations  while low dispersion lenses were used in the reimaging system  so the optical system do not need achromatic design for a high image quality. Then  to correct high-order aberrations resulting from large relative aperture  more parameters need to be used with aspheric or diffractive surfaces due to modern optic technology development. Here  aspheric is selected for easily manufacture. Finally  the design is completed with the help of ZEMAX software. The effective focal length of the objective is 120mm and the field of view (FOV) is 4. The simulated final design shows adequate image quality and the modulation transfer function (MTF) is close to diffraction limit. The effect of the surrounding environmental temperature is analyzed using the concept of thermal defocusing  and the thermal compensation is discussed. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).  
Phase Transition and Phonon Spectrum of Zinc-Blende Structure ZnX (X = S, Se, Te) 期刊论文  OAI收割
Communications in Theoretical Physics, 2010, 卷号: 53, 期号: 6, 页码: 1160-1166
J. J. Tan; G. F. Ji; X. R. Chen; Q. Q. Gou
收藏  |  浏览/下载:26/0  |  提交时间:2012/04/13
Experimental research of supercontinuum generation by femtosecond pulse in highly nonlinear photonic crystal fiber 期刊论文  OAI收割
acta physica sinica, 2008, 卷号: 57, 期号: 2, 页码: 917-922
作者:  
Liu Wei-Hua;  Song Xiao-Zhong;  Wang Yi-Shan;  Liu Hong-Jun;  Zhao Wei
收藏  |  浏览/下载:71/0  |  提交时间:2011/09/30
Design of dual-FOV refractive/diffractive LWIR optical system (EI CONFERENCE) 会议论文  OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
作者:  
Wang L.-J.
收藏  |  浏览/下载:33/0  |  提交时间:2013/03/25
An infrared-optical zoom system using binary element is proposed in this paper. The two main advantages of the zoom system introducing here are: bigger F-number and lower cost. The primary optical properties are: F/#=1  Second  Others  zoom ratio =1:4  binary element is used to correct the chromatical aberration by taking the advantage of negative dispersion characteristics and the cost of the system is lower than that of conventional ones with Zinc Selenide (Znse) material at the same level. In the binary element is rotational symmetric with one step which is easy to fabricate  in order to balance 5th spherical aberration  and dual field are 26.6 and 5.6respectively. Wider field of view is used for search and the smaller one is used for imaging details. This system uses un-cooled infrared detector with 320240 pixels and 45m pixel size. The F-number matches the sensitivity range of the detector array. Three aspects are considered during design process to make the system more satisfactory and more achievable. First  5th coma aberration and 5th astigmatic aberration  the manner of zoom is accomplished by exchanging tow lenses into the smaller field of view system layout. The lens exchange manner faces the requirement of simple system structure and good image quality in both focal points. It can also make the system more feasible in the alignment process than mechanical-zooming manner and optical-zooming manner  high-order asphere surfaces with 2th order to 10 th order are also hired in the system. Asphere surface is useful in compressing the system and improving optical system transmittance. This kind asphere surface is on industrial level featuring low cost and easy to fabricate. It is shown that good image quality can achieved by implementing five Germanium lenses and the transmittance of system is 72%. All aberrations are diffraction-limited  both spherical aberration and astigmatic aberration are corrected. When the field of view(FOV) is 26.6 and the focal length is 152mm  MTF at Nyquist frequency(11lp/mm) is great than 0.7. The spherical aberration is -0.0073. The coma aberration is 0.0978 and the astigmatic aberration is -0.013. When the field of view(FOV) is 5.6 and the focal length is 38mm  MTF at Nyquist frequency is great than 0.8 with spherical aberration -0.0046  the coma aberration 0.055 and astigmatic aberration 0.034.  
Mechanism of pulse shaping in femtosecond lasers based on the high-order soliton 期刊论文  OAI收割
optics and laser technology, 2000, 卷号: 32, 期号: 4, 页码: 251-253
作者:  
Zhao, SH;  Chen, GF;  Wang, YS;  Yu, LJ
收藏  |  浏览/下载:21/0  |  提交时间:2015/11/09
Hybrid fiber-single crystal fiber chirped-pulse amplification system emitting more than 1.5 GW peak power with beam quality better than 1.3 期刊论文  OAI收割
Journal of Lightwave Technology, 页码: 1-6
作者:  
Li, Feng;  Zhao, Wei;  Li, Qianglong;  Zhao, Hualong;  Wang, Yishan
  |  收藏  |  浏览/下载:5/0  |  提交时间:2023/10/12