Pub Date : 2012-10-02DOI: 10.1109/ICOOM.2012.6316273
Jianhua Liu, Zhi Liu, Puyao Wang, Q. Fu, Dan Liu
There were many ways of modulation in the laser communication system. In order to verify that PolSK modulation was the most suitable technology for space laser communication system, we analyzed the implementation principle of several signal modulation ways in this paper. By combing the theoretical analysis and software simulation, we make an analysis and comparative study through five aspects in the function of the PolSK modulation and the traditional modulation ways, including transmission rate in the unit, bandwidth requirements, transmission capacity, the average power utilization and error performance. The results indicated that PolSK modulation possess a higher transmission rate in the unit, a lower bandwidth requirements, and a larger transmission capacity. The most important thing was that PolSK modulation mode had a superior performance and a strong anti-air channel interference activity compared with the traditional modulation in a weak turbulence conditions. So PolSK modulation mode was suitable for laser communication system.
{"title":"Performance comparison study of modulation in atmospheric laser communication system","authors":"Jianhua Liu, Zhi Liu, Puyao Wang, Q. Fu, Dan Liu","doi":"10.1109/ICOOM.2012.6316273","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316273","url":null,"abstract":"There were many ways of modulation in the laser communication system. In order to verify that PolSK modulation was the most suitable technology for space laser communication system, we analyzed the implementation principle of several signal modulation ways in this paper. By combing the theoretical analysis and software simulation, we make an analysis and comparative study through five aspects in the function of the PolSK modulation and the traditional modulation ways, including transmission rate in the unit, bandwidth requirements, transmission capacity, the average power utilization and error performance. The results indicated that PolSK modulation possess a higher transmission rate in the unit, a lower bandwidth requirements, and a larger transmission capacity. The most important thing was that PolSK modulation mode had a superior performance and a strong anti-air channel interference activity compared with the traditional modulation in a weak turbulence conditions. So PolSK modulation mode was suitable for laser communication system.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123026715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-10-02DOI: 10.1109/ICOOM.2012.6316226
Haifeng Zhao, Yong Wang, Yinghong Wang, Xiaohua Wang
From the first generation in 1991 to the current tenth generation, liquid crystal display (LCD) monitor capacity has been expanding rapidly. With its output value increasing intensely in recent years, LCD monitor manufacturing has become a landmark industry in the 21 century [1]. LCD as a complex manufacturing process, the liquid crystal cell gap and the measurement of the amount of liquid drops play a key role in affecting optical properties of the background color and response speed of LCD. So it is significant to measure the cell gap of liquid crystal. A simple and feasible approach to measure cell gap is illustrated in this paper, and the relevant testing equipment is set up. It' demonstrated to be validated and uniform detection.
{"title":"Simple LCD cell gap test system","authors":"Haifeng Zhao, Yong Wang, Yinghong Wang, Xiaohua Wang","doi":"10.1109/ICOOM.2012.6316226","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316226","url":null,"abstract":"From the first generation in 1991 to the current tenth generation, liquid crystal display (LCD) monitor capacity has been expanding rapidly. With its output value increasing intensely in recent years, LCD monitor manufacturing has become a landmark industry in the 21 century [1]. LCD as a complex manufacturing process, the liquid crystal cell gap and the measurement of the amount of liquid drops play a key role in affecting optical properties of the background color and response speed of LCD. So it is significant to measure the cell gap of liquid crystal. A simple and feasible approach to measure cell gap is illustrated in this paper, and the relevant testing equipment is set up. It' demonstrated to be validated and uniform detection.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133899453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-10-02DOI: 10.1109/ICOOM.2012.6316283
Haodong Shi, Y. Zou, Jie Li, Henan Chen, Xiao-hui Ma
Panoramic camera's characteristics are large field of view, large field of depth, small volume, light weight and good seismic performance. It is widely used in aerial reconnaissance, topographic mapping and other fields. The ZEMAX software is used to research the panoramic camera lens. The lens system of the ordinary optical materials are discussed and analyzed. To explore the system structure with better image quality, the modulation transfer function of the lens system is adjusted, the radius of the surface, the thickness of lens and the air gap are optimized. The pros and cons of image quality are analyzed by the aberration curve.
{"title":"Optical design and optimization of panoramic objective lens system","authors":"Haodong Shi, Y. Zou, Jie Li, Henan Chen, Xiao-hui Ma","doi":"10.1109/ICOOM.2012.6316283","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316283","url":null,"abstract":"Panoramic camera's characteristics are large field of view, large field of depth, small volume, light weight and good seismic performance. It is widely used in aerial reconnaissance, topographic mapping and other fields. The ZEMAX software is used to research the panoramic camera lens. The lens system of the ordinary optical materials are discussed and analyzed. To explore the system structure with better image quality, the modulation transfer function of the lens system is adjusted, the radius of the surface, the thickness of lens and the air gap are optimized. The pros and cons of image quality are analyzed by the aberration curve.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114500903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-10-02DOI: 10.1109/ICOOM.2012.6316300
Yan Cui, Jun Xue, Lantao Wu, Qigang Shang
In this paper, the polyester nano-emulsion of methacrylate modified from unsaturated fatty acid is prepared without emulsifiers by using molecular self-assembly polymerization technology. And the particle size of polymers (100nm) is measured by using the method of CENT. And make use of the nanometer polymer nano emulsion as film to form material development, normal temperature self crosslinking water dispersion, grinding of High Performance Waterborne block type nanostructural paint for exterior wall. The experimental results show that waterborne block type nano structure of exterior wall paint basically eliminates all the problems of the ordinary paint and nano powder filled modified paint, and the scrub resistance and other properties of this kind of friendly nano-structured wall paint in the water dispersion environment has greatly improved and can reach more than 10,000 times.
{"title":"The study of friendly nano-structured wall paint in the water dispersion environment","authors":"Yan Cui, Jun Xue, Lantao Wu, Qigang Shang","doi":"10.1109/ICOOM.2012.6316300","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316300","url":null,"abstract":"In this paper, the polyester nano-emulsion of methacrylate modified from unsaturated fatty acid is prepared without emulsifiers by using molecular self-assembly polymerization technology. And the particle size of polymers (100nm) is measured by using the method of CENT. And make use of the nanometer polymer nano emulsion as film to form material development, normal temperature self crosslinking water dispersion, grinding of High Performance Waterborne block type nanostructural paint for exterior wall. The experimental results show that waterborne block type nano structure of exterior wall paint basically eliminates all the problems of the ordinary paint and nano powder filled modified paint, and the scrub resistance and other properties of this kind of friendly nano-structured wall paint in the water dispersion environment has greatly improved and can reach more than 10,000 times.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"569 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123118412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-10-02DOI: 10.1109/ICOOM.2012.6316312
Bo Wang, Mei Li, Ruikai Lian, Q. Zhu
Based on the third-order aberration theory and paraxial formula, the null test theory is derived. And after using the ZEMAX software to optimize the optical path, a more simple and convenience testing technology is discussed with a diameter of 60 mm convex paraboloid lens. Compared with traditional testing method, it doesn't need expensive testing equipment. The practice shows that this method not only promotes work efficiency but also reduces the cost of test, at the same time, the PV of parabolic surface of the lens reaches λ/5 after fulfillment.
{"title":"Fabrication and testing of convex conic aspheric surface","authors":"Bo Wang, Mei Li, Ruikai Lian, Q. Zhu","doi":"10.1109/ICOOM.2012.6316312","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316312","url":null,"abstract":"Based on the third-order aberration theory and paraxial formula, the null test theory is derived. And after using the ZEMAX software to optimize the optical path, a more simple and convenience testing technology is discussed with a diameter of 60 mm convex paraboloid lens. Compared with traditional testing method, it doesn't need expensive testing equipment. The practice shows that this method not only promotes work efficiency but also reduces the cost of test, at the same time, the PV of parabolic surface of the lens reaches λ/5 after fulfillment.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131974652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-10-02DOI: 10.1109/ICOOM.2012.6316257
Jian-Yu She, Yun-Da Li, Qi Li, Qi Wang
To measure the weak reflection characteristics of certain objects, a 2.52 THz electrically controlled object reflectivity measurement plan based on a THz laser and a cell detector has been proposed. The measurement theory was introduced. The solutions of the measurement errors caused by manual control, different object thicknesses, placed position and asynchronous signal have been also presented.
{"title":"A 2.52 THz electrically controlled object reflectivity measurement plan","authors":"Jian-Yu She, Yun-Da Li, Qi Li, Qi Wang","doi":"10.1109/ICOOM.2012.6316257","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316257","url":null,"abstract":"To measure the weak reflection characteristics of certain objects, a 2.52 THz electrically controlled object reflectivity measurement plan based on a THz laser and a cell detector has been proposed. The measurement theory was introduced. The solutions of the measurement errors caused by manual control, different object thicknesses, placed position and asynchronous signal have been also presented.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134466077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-10-02DOI: 10.1109/ICOOM.2012.6316217
Donghan Wei, S. Du, Ting Gao, Yon-Sup Pang, Bo Zhao, Hui Li, Y. Qu
The traditional annular electrode structure vertical cavity surface emitting semiconductor lasers (VCESL), the operating current injected into the active region is only in the very narrow channel of the annular edge of the area, make the distribution of the device internal thermal field uneven, affecting the output characteristic of the device. In this paper, present a new type of petaline electrode structure, form a number of independent emitting hole, making the device internal thermal field even, output characteristic of the device is improved remarkably. Active region is GaAs/Al0.3Ga0.7As three quantum well structure growing by molecular beam epitaxy (MBE), using the gradual change structure of AlGaAs as DBR. Prepare annular electrode and petaline electrode with the same process in the same epitaxial wafer. At the same time, analyzed internal thermal field distribution of this two kinds of different electrode structure by ANSYS finite element thermal analysis software. Through the analysis and calculation, we know, the Rthjc of new petaline electrode structure is 3.78°C/W, the Rthjc of traditional annular electrode structure is 4.78°C/W, thermal characteristic and stability of new petaline electrode structure are better than traditional annular electrode structure obviously.
{"title":"Thermal characteristic analysis of new structure in 850nm VCSEL","authors":"Donghan Wei, S. Du, Ting Gao, Yon-Sup Pang, Bo Zhao, Hui Li, Y. Qu","doi":"10.1109/ICOOM.2012.6316217","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316217","url":null,"abstract":"The traditional annular electrode structure vertical cavity surface emitting semiconductor lasers (VCESL), the operating current injected into the active region is only in the very narrow channel of the annular edge of the area, make the distribution of the device internal thermal field uneven, affecting the output characteristic of the device. In this paper, present a new type of petaline electrode structure, form a number of independent emitting hole, making the device internal thermal field even, output characteristic of the device is improved remarkably. Active region is GaAs/Al0.3Ga0.7As three quantum well structure growing by molecular beam epitaxy (MBE), using the gradual change structure of AlGaAs as DBR. Prepare annular electrode and petaline electrode with the same process in the same epitaxial wafer. At the same time, analyzed internal thermal field distribution of this two kinds of different electrode structure by ANSYS finite element thermal analysis software. Through the analysis and calculation, we know, the Rthjc of new petaline electrode structure is 3.78°C/W, the Rthjc of traditional annular electrode structure is 4.78°C/W, thermal characteristic and stability of new petaline electrode structure are better than traditional annular electrode structure obviously.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132635855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-10-02DOI: 10.1109/ICOOM.2012.6316233
Yue Zhang, Te Li, Rong Chen, Yuzhi Wang, Guojun Liu, E. Hao
Anti-guiding layers of asymmetric heterostructure for 100μm-wide-strip GaAs/AlGaAs quantum-well semiconductor lasers emitting at a wavelength of 808 nm are analyzed and calculated theoretically. Choosing three cases of Al-content of antiguiding layer in the active region [containing quantum well (QW) and waveguides], we calculate and analyze the dependences of optical confinement factor, threshold current, maximal output power and vertical beam divergence angle on the thickness of the antiguiding layer, separately. According to the results, when the thickness of antiguiding layer is constant, the higher the Al-content is the greater on performance of device is; when the Al-content in antiguiding layer is constant, the effect on performance of device enlarged with the increase of thickness of antiguiding layer.
{"title":"Investigation of refractive index antiguiding structure for asymmetric heterostructure semiconductor laser","authors":"Yue Zhang, Te Li, Rong Chen, Yuzhi Wang, Guojun Liu, E. Hao","doi":"10.1109/ICOOM.2012.6316233","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316233","url":null,"abstract":"Anti-guiding layers of asymmetric heterostructure for 100μm-wide-strip GaAs/AlGaAs quantum-well semiconductor lasers emitting at a wavelength of 808 nm are analyzed and calculated theoretically. Choosing three cases of Al-content of antiguiding layer in the active region [containing quantum well (QW) and waveguides], we calculate and analyze the dependences of optical confinement factor, threshold current, maximal output power and vertical beam divergence angle on the thickness of the antiguiding layer, separately. According to the results, when the thickness of antiguiding layer is constant, the higher the Al-content is the greater on performance of device is; when the Al-content in antiguiding layer is constant, the effect on performance of device enlarged with the increase of thickness of antiguiding layer.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132834454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-10-02DOI: 10.1109/ICOOM.2012.6316227
Yu Tian, Li Xu, Zhiwei Xue, Zhipeng Wei, Fei Yu, Zou Yonggang, Xiao-hui Ma, Wei Zhao, Qingxue Sui, Zhimin Zhang
AlGaInP LEDs with Coupled distributed bragg reflectors were grown by Metal-organic Chemical Vapor Deposition (MOCVD). The results showed that the peak wavelength of this structure LED was 625nm, and normal luminous intensity was increased to 164mcd on injection current 20mA from the LED with coupled DBR structure.
{"title":"Coupled distributed bragg reflector for high brightness red light-emitting diodes","authors":"Yu Tian, Li Xu, Zhiwei Xue, Zhipeng Wei, Fei Yu, Zou Yonggang, Xiao-hui Ma, Wei Zhao, Qingxue Sui, Zhimin Zhang","doi":"10.1109/ICOOM.2012.6316227","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316227","url":null,"abstract":"AlGaInP LEDs with Coupled distributed bragg reflectors were grown by Metal-organic Chemical Vapor Deposition (MOCVD). The results showed that the peak wavelength of this structure LED was 625nm, and normal luminous intensity was increased to 164mcd on injection current 20mA from the LED with coupled DBR structure.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133118573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-10-02DOI: 10.1109/ICOOM.2012.6316309
Danyang Wang, X. Zhou, Baoli Wang, Tao Liu, Xiuzhen Chang, Quanjun Wang
We report here a vapor diffusion method prepared peapod samples (C60 molecules in single walled carbon nanotubes (SWNTs)). The high pressure Raman measurements on the peapod samples by using a Mao-Bell type diamond anvil cell (DAC) will carry on under in situ or ex situ high pressure. The peapod samples will expose under UV laser line irradiation for the in situ high pressure investigation. The polymerization effect of C60 molecules inside SWNTs under both laser irradiation and pressure has been studied. The Raman spectra results of peapod samples from high pressure indicated that C60s become one-dimensional orthorhombic polymer.
{"title":"Preparation and polymerization study of (C60)n@SWNTs","authors":"Danyang Wang, X. Zhou, Baoli Wang, Tao Liu, Xiuzhen Chang, Quanjun Wang","doi":"10.1109/ICOOM.2012.6316309","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316309","url":null,"abstract":"We report here a vapor diffusion method prepared peapod samples (C60 molecules in single walled carbon nanotubes (SWNTs)). The high pressure Raman measurements on the peapod samples by using a Mao-Bell type diamond anvil cell (DAC) will carry on under in situ or ex situ high pressure. The peapod samples will expose under UV laser line irradiation for the in situ high pressure investigation. The polymerization effect of C60 molecules inside SWNTs under both laser irradiation and pressure has been studied. The Raman spectra results of peapod samples from high pressure indicated that C60s become one-dimensional orthorhombic polymer.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"257 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116189541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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