Pub Date : 2009-09-01DOI: 10.1109/SOPO.2009.5230089
Li Zhang, G. Fu, Xiaoyun Teng, Wei Yu, Heju Xu
Persistent photoconductivity was observed in ZnO film. The photoresponse transients were fitted well with exponential curves. The decay time constant represented the time accumulation during the process of the oxygen photodesorption. Keywords-ZnO films; photoconductivity; photoresponse
{"title":"Persistent Photoconductivity in Undoped n-Type ZnO Thin Films","authors":"Li Zhang, G. Fu, Xiaoyun Teng, Wei Yu, Heju Xu","doi":"10.1109/SOPO.2009.5230089","DOIUrl":"https://doi.org/10.1109/SOPO.2009.5230089","url":null,"abstract":"Persistent photoconductivity was observed in ZnO film. The photoresponse transients were fitted well with exponential curves. The decay time constant represented the time accumulation during the process of the oxygen photodesorption. Keywords-ZnO films; photoconductivity; photoresponse","PeriodicalId":6416,"journal":{"name":"2009 Symposium on Photonics and Optoelectronics","volume":"28 14","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91400209","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 : 2009-09-01DOI: 10.1109/SOPO.2009.5230250
G. He
It is revealed that quantum repeaters and quantum seals have a very close relationship, thus the theory in one field can be applied to the other. We give examples of novel results found by applying the existing theory of quantum seals on quantum repeater problem.
{"title":"Application of Quantum Seal Theory on Quantum Repeaters","authors":"G. He","doi":"10.1109/SOPO.2009.5230250","DOIUrl":"https://doi.org/10.1109/SOPO.2009.5230250","url":null,"abstract":"It is revealed that quantum repeaters and quantum seals have a very close relationship, thus the theory in one field can be applied to the other. We give examples of novel results found by applying the existing theory of quantum seals on quantum repeater problem.","PeriodicalId":6416,"journal":{"name":"2009 Symposium on Photonics and Optoelectronics","volume":"140 4","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91454350","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 : 2009-09-01DOI: 10.1109/SOPO.2009.5230209
Zhiwu Ke, Yong Ma, Hongyuan Wang, Hao Wang
The atmospheric correction for the ocean color remote sensing is the most important technique to retrieve the waterleaving radiance, which is less than about 10% of the satellite radiance. In Case II waters, the standard atmospheric correction method embedded in SeaDAS frequently yields negative waterleaving radiance, and its major uncertainties are occurred by the estimation error of atmospheric aerosols that is highly variable in both space and time. In this paper, a modified atmospheric correction method was proposed to correct the atmospheric aerosol effect in Case II waters. The aerosol information derived from multi-angles data in Case II waters and then modify the standard atmospheric correction algorithm to retrieve the waterleaving radiance. From the comparison of the standard atmospheric correction algorithm and the modified atmospheric correction algorithm, the results showed that the modified atmospheric correction method could be effective in Case II waters. KeywordsOcean color Remote; Atmospheric correction; Case II waters; Aerosol; Multi-angles
{"title":"Ocean Color Atmospheric Correction Method with Multi-Angles Data in Case II Waters","authors":"Zhiwu Ke, Yong Ma, Hongyuan Wang, Hao Wang","doi":"10.1109/SOPO.2009.5230209","DOIUrl":"https://doi.org/10.1109/SOPO.2009.5230209","url":null,"abstract":"The atmospheric correction for the ocean color remote sensing is the most important technique to retrieve the waterleaving radiance, which is less than about 10% of the satellite radiance. In Case II waters, the standard atmospheric correction method embedded in SeaDAS frequently yields negative waterleaving radiance, and its major uncertainties are occurred by the estimation error of atmospheric aerosols that is highly variable in both space and time. In this paper, a modified atmospheric correction method was proposed to correct the atmospheric aerosol effect in Case II waters. The aerosol information derived from multi-angles data in Case II waters and then modify the standard atmospheric correction algorithm to retrieve the waterleaving radiance. From the comparison of the standard atmospheric correction algorithm and the modified atmospheric correction algorithm, the results showed that the modified atmospheric correction method could be effective in Case II waters. KeywordsOcean color Remote; Atmospheric correction; Case II waters; Aerosol; Multi-angles","PeriodicalId":6416,"journal":{"name":"2009 Symposium on Photonics and Optoelectronics","volume":"45 7","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91554703","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 : 2009-09-01DOI: 10.1109/SOPO.2009.5230228
Tao Hu, Zhiwei Lv, Yong Zhao, Xing Li, Jingjing Chen
A novel fiber optic F-P electromagnetic sensor is developed based on magnetic fluid as the medium in F-P interference cavity. A signal demodulation method based on fiber Bragg grating wavelength scanning is proposed. Theory and principle of electromagnetic-controlled refractive index of the magnetic fluid is described as well as the structure of the sensor system. Preliminary experiments are carried out, and the results indicate that there is a fairly good linearity of the measurement characteristic, and the thickness of magnetic fluid film and environmental temperature will affect the measurement results.
{"title":"Novel Optical Fiber Magnetic Sensor Based on Magnetic Fluid","authors":"Tao Hu, Zhiwei Lv, Yong Zhao, Xing Li, Jingjing Chen","doi":"10.1109/SOPO.2009.5230228","DOIUrl":"https://doi.org/10.1109/SOPO.2009.5230228","url":null,"abstract":"A novel fiber optic F-P electromagnetic sensor is developed based on magnetic fluid as the medium in F-P interference cavity. A signal demodulation method based on fiber Bragg grating wavelength scanning is proposed. Theory and principle of electromagnetic-controlled refractive index of the magnetic fluid is described as well as the structure of the sensor system. Preliminary experiments are carried out, and the results indicate that there is a fairly good linearity of the measurement characteristic, and the thickness of magnetic fluid film and environmental temperature will affect the measurement results.","PeriodicalId":6416,"journal":{"name":"2009 Symposium on Photonics and Optoelectronics","volume":"35 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91277240","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}
A method to fabricated Eu3+-immersed in porous glass microspheres is reported. The fabricated glass microspheres and the porous glass microspheres are characterized by scanning electroscopy (SEM) and transmission electron microscopy (TEM), and the sizes of glass microspheres and the sizes of aperture of the porous glass microspheres are estimated, respectively. The photoluminescence spectroscopy of the Euimmersed in porous glass microspheres is tested. The fluorescent and emission spectra indicate that the characteristics of the Eu3+immersed in porous glass microspheres result from D0 F0, D0 F1 and D0 F2 transitions with increasing wavelength. Keywords-Eu3+-immersed in porous glass microspheres, fluorescent and emission spectra, SEM, TEM
报道了一种制备浸没在多孔玻璃微球中的Eu3+的方法。利用扫描电镜(SEM)和透射电镜(TEM)对制备的玻璃微球和多孔玻璃微球进行了表征，并分别估算了玻璃微球的尺寸和多孔玻璃微球的孔径大小。测试了铕在多孔玻璃微球中的光致发光光谱。荧光光谱和发射光谱表明，浸没在多孔玻璃微球中的Eu3+的特性是由于D0 F0、D0 F1和D0 F2随波长增加而发生的跃迁。浸没在多孔玻璃微球中的eu3 +，荧光光谱和发射光谱，SEM, TEM
{"title":"Fabrication of Eu3+-Immersed in Porous Glass Microspheres and Fluorescent Characterizations","authors":"Jufang Tong, Aimei Liu, Hao Lv, Yun Wu, Xunong Yi, Qianguang Li","doi":"10.1109/SOPO.2009.5230086","DOIUrl":"https://doi.org/10.1109/SOPO.2009.5230086","url":null,"abstract":"A method to fabricated Eu3+-immersed in porous glass microspheres is reported. The fabricated glass microspheres and the porous glass microspheres are characterized by scanning electroscopy (SEM) and transmission electron microscopy (TEM), and the sizes of glass microspheres and the sizes of aperture of the porous glass microspheres are estimated, respectively. The photoluminescence spectroscopy of the Euimmersed in porous glass microspheres is tested. The fluorescent and emission spectra indicate that the characteristics of the Eu3+immersed in porous glass microspheres result from D0 F0, D0 F1 and D0 F2 transitions with increasing wavelength. Keywords-Eu3+-immersed in porous glass microspheres, fluorescent and emission spectra, SEM, TEM","PeriodicalId":6416,"journal":{"name":"2009 Symposium on Photonics and Optoelectronics","volume":"40 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86909557","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 : 2009-09-01DOI: 10.1109/SOPO.2009.5230244
W. Oh, K. Park, K. Min, Y. Im, Y. S. Lee
In this paper, a 10-Gb/s, 95-dB�, 20-mW optical receiver front-end is realized in a 0.13-�� m CMOS technology for high speed serial interface. To guarantee 10-Gb/s operation using low cost photodiode, the effect of inherent photodiode parasitic capacitance should be suppressed. Thus, LC-ladder filter and modified common-gate amplifier is exploited as the input stage of pre amplifier. To enhance the bandwidth, capacitive degeneration, active feedback, and negative impedance compensation, and inversely scaling technique are exploited in pre and post amplifier.
本文采用0.13 μ m CMOS技术实现了10gb /s、95db、20mw的高速串行接口光接收机前端。为了保证低成本光电二极管的10gb /s工作，必须抑制光电二极管固有寄生电容的影响。因此，采用lc阶梯滤波器和改进的共门放大器作为前置放大器的输入级。为了提高带宽，在前置和后置放大器中采用了容性退化、有源反馈、负阻抗补偿和反向缩放技术。
{"title":"A 10-Gb/s, 95-dBOmega, 20-mW Optical Receiver Front-End in 0.13-mum CMOS Technology","authors":"W. Oh, K. Park, K. Min, Y. Im, Y. S. Lee","doi":"10.1109/SOPO.2009.5230244","DOIUrl":"https://doi.org/10.1109/SOPO.2009.5230244","url":null,"abstract":"In this paper, a 10-Gb/s, 95-dB�, 20-mW optical receiver front-end is realized in a 0.13-�� m CMOS technology for high speed serial interface. To guarantee 10-Gb/s operation using low cost photodiode, the effect of inherent photodiode parasitic capacitance should be suppressed. Thus, LC-ladder filter and modified common-gate amplifier is exploited as the input stage of pre amplifier. To enhance the bandwidth, capacitive degeneration, active feedback, and negative impedance compensation, and inversely scaling technique are exploited in pre and post amplifier.","PeriodicalId":6416,"journal":{"name":"2009 Symposium on Photonics and Optoelectronics","volume":"17 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87637559","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 : 2009-09-01DOI: 10.1109/SOPO.2009.5230122
Wenhai Xu, Ying Li
Delayed fluorescence (DF) is the phenomenon of longlived photon emission by plant after being illuminated with light and put into darkness. In field study, the intensity of DF is reported to be a measure of photosynthetic capacity (marked as PhC). In this research, a new method was developed, which used unsaturated light-induced DF intensity (in this research, marked as IDF) to represent plant PhC. The proposed method prolonged the sustainable working hours of DF detection system. Hence, it was more appropriate than saturated light condition for field study. In order to examine the new method, four different species were chosen as samples to compare IDF with net photosynthetic rate (Pn) under different intensities of excitation light. The results showed that there is an excellent linear correlation between them (R≥0.947). The experimental results testified that unsaturated light-induced IDF can represent the plant PhC.
{"title":"Experimental Study on Using Unsaturated Light-Induced Delayed Fluorescence to Represent Plant Photosynthetic Capacity","authors":"Wenhai Xu, Ying Li","doi":"10.1109/SOPO.2009.5230122","DOIUrl":"https://doi.org/10.1109/SOPO.2009.5230122","url":null,"abstract":"Delayed fluorescence (DF) is the phenomenon of longlived photon emission by plant after being illuminated with light and put into darkness. In field study, the intensity of DF is reported to be a measure of photosynthetic capacity (marked as PhC). In this research, a new method was developed, which used unsaturated light-induced DF intensity (in this research, marked as IDF) to represent plant PhC. The proposed method prolonged the sustainable working hours of DF detection system. Hence, it was more appropriate than saturated light condition for field study. In order to examine the new method, four different species were chosen as samples to compare IDF with net photosynthetic rate (Pn) under different intensities of excitation light. The results showed that there is an excellent linear correlation between them (R≥0.947). The experimental results testified that unsaturated light-induced IDF can represent the plant PhC.","PeriodicalId":6416,"journal":{"name":"2009 Symposium on Photonics and Optoelectronics","volume":"5 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87236390","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 : 2009-09-01DOI: 10.1109/SOPO.2009.5230194
Yabin Zhang, Z. Dou, Lei Yu, Yong Wang, Wen-Yao Liu
The method for elimination the average laser intensity in the 3-output demodulation method of M-Z interferometric fiber optic sensor seems easier, but the result is different. The disposal process is theoretically anayzed and simulated. At last a conclusion is given. Keywords-3×3coupler; Interferometric Fiber-optic Sensor; DC (direct current) component
{"title":"Research on 3×3 Coupler Beased Demodulation for Fiber Optic Sensor","authors":"Yabin Zhang, Z. Dou, Lei Yu, Yong Wang, Wen-Yao Liu","doi":"10.1109/SOPO.2009.5230194","DOIUrl":"https://doi.org/10.1109/SOPO.2009.5230194","url":null,"abstract":"The method for elimination the average laser intensity in the 3-output demodulation method of M-Z interferometric fiber optic sensor seems easier, but the result is different. The disposal process is theoretically anayzed and simulated. At last a conclusion is given. Keywords-3×3coupler; Interferometric Fiber-optic Sensor; DC (direct current) component","PeriodicalId":6416,"journal":{"name":"2009 Symposium on Photonics and Optoelectronics","volume":"23 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85601097","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 : 2009-09-01DOI: 10.1109/SOPO.2009.5230157
Y. Lin, Y. M. Yang, X. W. Li, Z. Huang
Plasma enhanced chemical vapor deposition (PECVD), one of the most widely used techniques in modern microelectronics, is firstly employed to prepare ferromagnetic ZnO-based and TiO2-based magnetic semiconductors at low deposition temperature without any carrier gas. ZnO-based films show excellent photoluminescence at room temperature. All doped oxide films show room-temperature ferromagnetic behaviors by using superconducting quantum interference device measurements. Magnetic ions incorporating into host lattice and the exclusion of secondary phase in films are confirmed by microstructure analysis and magnetic results, such as XRD, XPS, PL and FC/ZFC. In order to gain insights into the effect of oxygen vacancies or nitrogen implantation on ferromagnetism of oxide-based semiconductors, all films were annealed in N2 ambience at 900 or treated in NH3 or O2 plasma at 350 . The results indicated the crucial role of hole-carriers or oxygenvacancies playing in the ferromagnetic coupling between magnetic ions in oxide-based semiconductors.
{"title":"ZnO- and TiO2-Based Semiconductor Films Prepared by Plasma Enhanced CVD Without any Carrier Gas","authors":"Y. Lin, Y. M. Yang, X. W. Li, Z. Huang","doi":"10.1109/SOPO.2009.5230157","DOIUrl":"https://doi.org/10.1109/SOPO.2009.5230157","url":null,"abstract":"Plasma enhanced chemical vapor deposition (PECVD), one of the most widely used techniques in modern microelectronics, is firstly employed to prepare ferromagnetic ZnO-based and TiO2-based magnetic semiconductors at low deposition temperature without any carrier gas. ZnO-based films show excellent photoluminescence at room temperature. All doped oxide films show room-temperature ferromagnetic behaviors by using superconducting quantum interference device measurements. Magnetic ions incorporating into host lattice and the exclusion of secondary phase in films are confirmed by microstructure analysis and magnetic results, such as XRD, XPS, PL and FC/ZFC. In order to gain insights into the effect of oxygen vacancies or nitrogen implantation on ferromagnetism of oxide-based semiconductors, all films were annealed in N2 ambience at 900 or treated in NH3 or O2 plasma at 350 . The results indicated the crucial role of hole-carriers or oxygenvacancies playing in the ferromagnetic coupling between magnetic ions in oxide-based semiconductors.","PeriodicalId":6416,"journal":{"name":"2009 Symposium on Photonics and Optoelectronics","volume":"137 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74520457","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 : 2009-09-01DOI: 10.1109/SOPO.2009.5230229
Tao Hu, Zhiwei Lv, Yong Zhao, Xinyuan Zhang, Bo Yuan
Principle, structure design, and experimental setup of a fiber Bragg grating (FBG) sensor with a simple signal detection method for demodulation of resonance wavelength shift of the FBG are introduced, which uses a cascade self-demodulated fiber Bragg grating pair attached respectively on the upper and lower surface of a pendulum-type cantilever element instead of a twice reflection FBG pair structure for both parameter sensing and wavelength shift signal demodulating. In addition, crosssensitivity effect of FBG-based sensor automatically solved due to a differential signal process method. With this demodulation method, current, and vibration measurement experiments are carried out. Experimental results indicate that current measurement error of ±1mA can be obtained within the whole range from 0 to 400mA, vibration measurement are also obtained based on the present experiment setup. Keywordsfiber Bragg grating sensor; current measurement; gravity pendulum; electromagnetic force
{"title":"Fiber Bragg Grating Sensor with a Simple Demodulation Method","authors":"Tao Hu, Zhiwei Lv, Yong Zhao, Xinyuan Zhang, Bo Yuan","doi":"10.1109/SOPO.2009.5230229","DOIUrl":"https://doi.org/10.1109/SOPO.2009.5230229","url":null,"abstract":"Principle, structure design, and experimental setup of a fiber Bragg grating (FBG) sensor with a simple signal detection method for demodulation of resonance wavelength shift of the FBG are introduced, which uses a cascade self-demodulated fiber Bragg grating pair attached respectively on the upper and lower surface of a pendulum-type cantilever element instead of a twice reflection FBG pair structure for both parameter sensing and wavelength shift signal demodulating. In addition, crosssensitivity effect of FBG-based sensor automatically solved due to a differential signal process method. With this demodulation method, current, and vibration measurement experiments are carried out. Experimental results indicate that current measurement error of ±1mA can be obtained within the whole range from 0 to 400mA, vibration measurement are also obtained based on the present experiment setup. Keywordsfiber Bragg grating sensor; current measurement; gravity pendulum; electromagnetic force","PeriodicalId":6416,"journal":{"name":"2009 Symposium on Photonics and Optoelectronics","volume":"191 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76052699","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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