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The mode-matching model of diode-end-pumped alkali vapor lasers 会议论文
20th International Symposium on High Power Systems and Applications 2014, Chengdu, August 25
作者:  Xu, Yan;  Xie, Jijiang;  Chen, Fei;  Yang, Guilong;  Li, Dianjun
收藏  |  浏览/下载：24/0  |  提交时间：2016/07/18
Mathematical modeling and simulating of microscan for area CCD 会议论文
2013 2nd International Conference on Sensors, Measurement and lntelligent Materials, ICSMIM 2013, November 16, 2013 - November 17, 2013, Guangzhou, China
Li Y. P.; He B.; Sha W.
收藏  |  浏览/下载：13/0  |  提交时间：2015/04/27
In-situ and real time stress of 30.4 nm Mo/Si multilayer mirror for the moon-based EUV camera 会议论文
International Symposium on Optoelectronic Technology and Application 2014: Laser Materials Processing; and Micro/Nano Technologies, IPTA 2014, May 13, 2014 - May 15, 2014, Beijing, China
Li Y.-P.; Chen B.; He F.; Yang H.-B.; Wang X.-D.; Zheng X.; Wang X.-D.; Zhang H.-J.; Wang H.-F.; Cao J.-L.
收藏  |  浏览/下载：12/0  |  提交时间：2015/04/27
Comparison and simulation of subpixel imaging modes for linear CCD (EI CONFERENCE) 会议论文
2012 3rd International Conference on Information Technology for Manufacturing Systems, ITMS 2012, September 8, 2012 - September 9, 2012, Qingdao, China
Li Y.; He B.; Liu T.
收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25
Subpixel technique of linear CCD is effective to enhance the spatial resolution without increasing the focal length of optics and reducing the pixel size. To compare image quality of two main subpixel imaging modes  quincunx sampling and four-point sampling  a method to quantitatively evaluate image quality of subpixel based on MTF was proposed. The MTF of quincunx and four-point sampling modes were derived. Analytical results shows that theoretical limiting resolution of quincunx sampling and four-point sampling is improved to 1.4 and 1.86 times respectively  and MTF values at Nyquist frequency of two modes are increased by 0.1106 and 0.1679  respectively. MTFA in (0  0.5) of two subpixel imaging modes were calculated and results illustrates that four-point sampling offers much more improvement with image quality than quincunx sampling  at the cost of double amount of data. A model for simulating subpixel imaging using Matlab was established  and simulation results of spoke target verify the theoretical analysis. (2012) Trans Tech Publications  Switzerland.  
A sensitive solid-phase time-resolved fluorescence immunoassay apparatus (EI CONFERENCE) 会议论文
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
Wang Y.-L.; Song K.-F.; Zhang W.-L.; Li J.-L.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
In the device  a He-Ne laser of flash frequency 1-20 Hz was adopted as exciting light source  and three key technical problems have been solved successfully in order to enhance the detecting sensitivity and measuring stability of the device for time-resolved fluorimmunoassays(TRFIA) [1]. The first one is to design optimum exciting optical system  so that the exciting light beam excite the sample most effectively. The second one is to have a project spectrum filter which can reduce the affection of the background light to the photomultiplier tube and also ensure influence of the stray light and mixed diffusion light to the sample fluorescence to the least  the sample fluorescence through the integrating sphere and come to the grating monochromator  The right wavelength will be chosed through changing the angle of incidence of the grating monochromator. The third one is to simulate the principle of sample averaging of BOXCAR averager. In the device  SCM was used as primary controller and CPLD was used as timing controller. Through the preparation process  signal-to-noise ratio(SNR) will be improved  also adjust delay time  ampling frequency and sampling number arbitrarily. By testing  the sensitivity is 10-12mol/L(substance marked by Eu3+)  examination repeat is &le2.5%  examination linearity is from 10 -8mol/L to 10-12mol/L  correlation coefficient is 99.98%(p&le0.01). The instrument is advanced for ultrasensitive detection of antigen and antibody  and solve the tumor  genetic variation  the virus protein detection. 2009 SPIE.  
The structural transition of Gd2O3 nanoparticles induced by high pressure (EI CONFERENCE) 会议论文
Chen H.; He C.; Gao C.; Ma Y.; Zhang J.; Wang X.; Gao S.; Li D.; Kan S.; Zou G.
收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25
The spectral feature analysis of semiconductor thin disk laser (EI CONFERENCE) 会议论文
Optoelectronic Materials and Devices II, November 2, 2007 - November 5, 2007, Wuhan, China
He C.-F.; Qin L.; Li J.; Cheng L.-W.; Liang X.-M.; Ning Y.-Q.; Wang L.-J.
收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25
The semiconductor thin disk laser is a new type of semiconductor laser. This work gives the basic operation function of semiconductor disk laser  and analyses the heat effect by the experimentally measured photoluminescence spectrum of the laser chip at different pump power and different temperature. We can see that: with increasing pump power  the thermal effects of the gain material becomes seriously and causes the saturation of carrier lifetime  so the electron-hole pair created in the absorbtion layer have no enough time to rate to one of the wells  and the non-radiative recombination happens in the barrier. When the thermal effects becomes stronger  the chip will not lasing. This phenomenon is from the smaller energy offset between barrier and quantum well. We optimize the original structure design and experimental technology. A non-absorbing AlGaAs layer who is transparent to the pumping and laser wavelength is added to confine the carriers in the quantum wells. At the same time a DBR with double reflecting band is induced to improve the absorbing efficiency of the pumping light. The single QW is replaced by the three narrow QWs  This three QWs structure can add the quantum state of QW  increase the recombination probability of carriers in the QWs and reduce the heat effect. The chemical etch equipment is also improved to control the surface unevenness to be within 50 nm.  
The spectral feature analysis of semiconductor thin disk laser - art. no. 67820E 会议论文
2007
He C. F.; Qin L.; Li J.; Cheng L. W.; Liang X. M.; Ning Y. Q.; Wang L. J.
收藏  |  浏览/下载：9/0  |  提交时间：2013/03/28
Vertical-external-cavity surface-emitting lasers operating at different wavelength: design, numerical simulation, and characteristics - art. no. 602004 会议论文
2005
Yan C. L.; Qin L.; Shan X. N.; Lu G. G.; He C. F.; Sun Y. F.; Li T.; Ning Y. Q.; Wang L. J.; Jiang H. L.
收藏  |  浏览/下载：8/0  |  提交时间：2013/03/28
980nm high power Vertical External-cavity Surface-emitting Semiconductor Lasers (VECSEL) (EI CONFERENCE) 会议论文
Optoelectronic Materials and Devices for Optical Communications, November 7, 2005 - November 10, 2005, Shanghai, China
Lu G.-G.; He C.-F.; Shan X.-N.; Li T.; Sun Y.-F.; Qin L.; Yan C.-L.; Ning Y.-Q.; Wang L.-J.
收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25

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