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长春光学精密机械与物... [7]
上海光学精密机械研究... [2]
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OAI收割 [9]
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会议论文 [7]
期刊论文 [2]
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2013 [1]
2011 [2]
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Structural amelioration of 920 nm optically pumped semiconductor vertical external-cavity surface emitting laser (OPS-VECSEL) (EI CONFERENCE)
会议论文
OAI收割
2nd International Conference on Energy, Environment and Sustainable Development, EESD 2012, October 12, 2012 - October 14, 2012, Jilin, China
作者:
Liu Y.
;
Liu Y.
;
Wang L.
;
Wang L.
;
Wang L.
收藏
  |  
浏览/下载:20/0
  |  
提交时间:2013/03/25
920 nm optically pumped semiconductor vertical external-cavity surface emitting laser (OPS-VECSEL) has an important application in laser display. We constructed and optimized a 920 nm OPS-VECSEL with active region of In0.09Ga0.91As quantum well (QW) system pumped by 808 nm laser diode module. By the finite element method
self-consistent solutions of the semiconductor electronic and optical equations are realized to calculate the characteristics parameters of OPS-VECSEL. The performances of device especially the mode
the threshold and the optical-optical translation efficiency were analyzed by dealing with different number of QWs (1
2 and 3) in one period
QW depth
barrier width
the component and dimension of the non-absorption layer. We chose an improved structure of them. On this basis
we ameliorated the number of QW periods and the simulation showed that in order to obtain high performance device
the choice of the number of QW periods must be cautious. (2013) Trans Tech Publications
Switzerland.
MAC protocol with dynamic priority adjustment for light trail networks (EI CONFERENCE)
会议论文
OAI收割
Network Architectures, Management, and Applications VIII, December 8, 2010 - December 12, 2010, Shanghai, China
作者:
Fang W.
;
Li S.
收藏
  |  
浏览/下载:23/0
  |  
提交时间:2013/03/25
In order to improve the wavelength utilization as well as the fairness of the light trail networks
we modified the FP MAC from the view point of weight balance by introducing a weight mode. The weight mode is composed of two factors
real-time factor and node activity ratio. Moreover
the weight mode is used as a bid by each LT node to compute the priority. Hence
the priority of the LT node is adjusted dynamically in every round and the MAC protocol with dynamic priority adjustment is entitled as DPA MAC. Simulation results show that the performances of DPA MAC protocol are much better than that of FP MAC protocol in terms of packet loss rate and activity percentile. 2011 Copyright SPIE - The International Society for Optical Engineering.
Design of VxWorks-based software architecture for space optical remote sensor (EI CONFERENCE)
会议论文
OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
Tao Y.
;
Song K.
收藏
  |  
浏览/下载:38/0
  |  
提交时间:2013/03/25
In order to satisfy requirements of real time and parallel control for the space optical remote sensor and implement the high integration of software
a kind of VxWorks-based multitask software architecture was put forward. Firstly
the technological requirements of optical remote sensor were analyzed in detail and functions and performances of the optical remote sensor were fixed. Task that was based on each function of optical remote sensor was compartmentalized. Then
software architecture of optical remote sensor was designed. Finally
experiments were carried out and results verified the accuracy and feasibility of the software architecture. Test results showed that the software architecture satisfied the requirements of real time and parallel control for the space optical remote sensor
its functions and performances met the system design target perfectly
and the software architecture was applicable to the engineering application of space instrument. 2011 IEEE.
The design of missile's dome that fits both optical and aerodynamic needs (EI CONFERENCE)
会议论文
OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Smart Structures and Materials in Manufacturing and Testing, April 26, 2010 - April 29, 2010, Dalian, China
作者:
Zhang X.
;
Zhang X.
;
Zhang X.
收藏
  |  
浏览/下载:14/0
  |  
提交时间:2013/03/25
Optical guidance missiles requires a dome which fits both optical and aerodynamic needs when they attack at 3 Ma. In this study
ellipse is the figure chosen to be the dome's shape. The ellipticity is the main variable should to be decided. The optimized function was built by optical and aerodynamic performance function multiply by their weights. The optical and aerodynamic functions were all obtained by computational fluid dynamic (CFD) simulation's results after normalization. In this study
the optical and aerodynamic performances have equal weights
after optimzing the ellipticity is 2 for the missile. 2010 SPIE.
Optical system of large relative aperture and wide field using aspheric corrector for detecting (EI CONFERENCE)
会议论文
OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者:
Zhang J.
;
Zhang J.
;
Zhang J.
;
Wang J.
收藏
  |  
浏览/下载:22/0
  |  
提交时间:2013/03/25
The magnitude requirement of space target detecting determines that the image of detecting telescope should have several performances: small spots
the wider field of view
small 80% encircled energy diameter and good MTF(Modulation transfer function). So the aperture and field of view of optical system have some demands accordingly. The larger aperture
the more extensive range which the telescope searches. Now most of ground telescopes whose apertures are from 500mm to 1000mm is on-axis optical system
the more energy that telescope collects and higher magnitude the telescope detects
so wide field of view becomes the most importance problem. To obtain large relative aperture and wide field of view
the paper introduces a catadioptric telescope with small aperture aspheric refractive corrector
whose conic surface will be used to remove the aberrations due to large relative aperture and wide field of view. As to the optical system
there is only one aspheric refractive corrector
and it is relatively easy for manufacturing because of its concave figure and normal material. The paper gives the example
and optimizes this optical system with ZEMAX program. And then the paper provides a specific analysis program for testing the aspheric refractive corrector. The aperture of this optical system is 750mm
and its relative aperture is 0.82
and the field of view is 3.6 diameter(diagonal). Its structure is simple and the image quality is also very good. 2009 SPIE.
High-fidelity replication of Dammann gratings using soft lithography
期刊论文
OAI收割
appl. optics, 2008, 卷号: 47, 期号: 10, 页码: 1427, 1429
Wang Wei
;
周常河
;
Jia Wei
收藏
  |  
浏览/下载:1069/158
  |  
提交时间:2009/09/18
Dammann gratings
Diffraction imaging
Grating structures
High throughputs
High-fidelity
Light intensities
Low costs
Optical performances
Soft-lithography
Surface reliefs
UV-curable
基于RS编码及网格编码调制的光PPM通信纠错技术
期刊论文
OAI收割
光子学报, 2008, 卷号: 37, 期号: 7, 页码: 1361, 1364
梁波
;
陈卫标
收藏
  |  
浏览/下载:1039/159
  |  
提交时间:2009/09/18
空间光通信
Communication performances
RS纠错码
Effective communications
TCM技术
External code
PPM调制
Numerical simulations
Optical channels
Optical communication systems
Optical-
PPM modulation
Reed-Solomon code
RS coding
Space optical communication
TCM
Trellis code modulations
Trellis-code modulation
Integrated mach-zehnder micro-interferometer for gas trace remote sensing (EI CONFERENCE)
会议论文
OAI收割
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
作者:
Wang P.
收藏
  |  
浏览/下载:43/0
  |  
提交时间:2013/03/25
The realisation process and the preliminary tests on the performances of an integrated Mach-Zehnder Interferometer on LiNbO3 (Lithium Niobate) substrate is presented. The microsystem has been obtained by using medium mass Ion Implantation on X-cut Lithium Niobate crystals. The interferometer is formed by integrated optical channel waveguides: the phase shift between the two optical paths has been obtained
1mm 2 cross section and weights a few grams. The power consumption is in the milliwatt range. In the present work results obtained in the spectral window (0.4m-1.1m) will be presented. The performance of the device
without moving parts
evaluated on standard radiation sources
by applying a suitable electric field. The whole device is 60mm long
demonstrates that a spectral resolution better than 0.3nm can be obtained on 400nm spectral windows. The Micro-interferometer has been tested in laboratory with a calibrated cell containing NO2 gas and has demonstrated sensitivity in the ppb range if suitable optical paths are used. Its reduced dimensions and weights make these micro-systems ideal for a wide range of applications
has a 0.57times
spanning from Space Technology
Earth observation for Environment monitoring
to Safety and Security applications.
Holographic polymer Bragg gratings for dense wavelength division multiplexing at 1550nm (EI CONFERENCE)
会议论文
OAI收割
Holography, Diffractive Optics, and Applications II, November 8, 2004 - November 11, 2004, Beijing, China
作者:
Wang W.
;
Wang W.
收藏
  |  
浏览/下载:19/0
  |  
提交时间:2013/03/25
Bragg grating has lots of use in many optical field. Especially
in dense wavelength division multiplexing system and optical filters
and so on. Holographic Bragg grating with 1800 line/mm is fabricated in this experiment. Performances of holographic Bragg gratings are measured in our lab. Results show that this holographic Bragg grating can resolve 0.26nm fine line spectrum. Diffraction efficiency of Bragg grating can get 76% in 1.55m wavelength. Results also show that this kind of holographic Bragg grating may use in DWDM device and can produce fine narrow width spectra.