Pub Date : 2012-05-21DOI: 10.1109/SOPO.2012.6270923
Jun-sen Lai, Aiying Yang, Lin Zuo, Jian Li, Yu-nan Sun
A novel chromatic dispersion (CD) monitoring method of 40Gbps 33% duty-cycle return-to-zero on-off key (RZ-OOK), 50% duty-cycle RZ-OOK, and carrier-suppressed return-to-zero on-off key (CSRZ-OOK) signals by using half-symbol delay-tap sampling technique is demonstrated. The delay-tap sampling scatter plots not only identify three kinds of RZ-OOK signals but also reflect signal distortion caused by CD. The application of proposed scheme for CD monitoring in the range of 0-120 ps/nm is demonstrated and its tolerance to other impairments is also analyzed.
{"title":"Chromatic Dispersion Monitoring for RZ-OOK Signals Using Half-Symbol Delay-Tap Sampling","authors":"Jun-sen Lai, Aiying Yang, Lin Zuo, Jian Li, Yu-nan Sun","doi":"10.1109/SOPO.2012.6270923","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270923","url":null,"abstract":"A novel chromatic dispersion (CD) monitoring method of 40Gbps 33% duty-cycle return-to-zero on-off key (RZ-OOK), 50% duty-cycle RZ-OOK, and carrier-suppressed return-to-zero on-off key (CSRZ-OOK) signals by using half-symbol delay-tap sampling technique is demonstrated. The delay-tap sampling scatter plots not only identify three kinds of RZ-OOK signals but also reflect signal distortion caused by CD. The application of proposed scheme for CD monitoring in the range of 0-120 ps/nm is demonstrated and its tolerance to other impairments is also analyzed.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"631 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123279605","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270448
Jiazhong Chang, Chunyang Li, Dan Yue, Xin-lei Zhang, Zhenling Wang, Wei-Yuen Lu
Single-crystal EuPO4 nanowires have been prepared by a facile hydrothermal technique and characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), UV-Vis diffuse reflectance spectrum (DRS), photoluminescence (PL) spectra and lifetime. The results indicate that the as-prepared sample has monoclinic structure of EuPO4 and is mainly composed of single-crystal nanowires with the diameter of around 30 nm and the length of 2~5 μm. Under the UV light irradiation, single-crystal EuPO4 nanowires exhibit bright orange-red emission corresponding to the 5D0→7FJ (J = 1, 2, 3, 4) transitions of the Eu3+ ions. The PL decay curve can be fitted into a double exponential function and the average lifetime is about 0.5 ms.
{"title":"Hydrothermal Synthesis and Optical Properties of Single-Crystal EuPO4 Nanowires","authors":"Jiazhong Chang, Chunyang Li, Dan Yue, Xin-lei Zhang, Zhenling Wang, Wei-Yuen Lu","doi":"10.1109/SOPO.2012.6270448","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270448","url":null,"abstract":"Single-crystal EuPO<sub>4</sub> nanowires have been prepared by a facile hydrothermal technique and characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), UV-Vis diffuse reflectance spectrum (DRS), photoluminescence (PL) spectra and lifetime. The results indicate that the as-prepared sample has monoclinic structure of EuPO<sub>4</sub> and is mainly composed of single-crystal nanowires with the diameter of around 30 nm and the length of 2~5 μm. Under the UV light irradiation, single-crystal EuPO<sub>4</sub> nanowires exhibit bright orange-red emission corresponding to the <sup>5</sup>D<sub>0</sub>→<sup>7</sup>FJ (J = 1, 2, 3, 4) transitions of the Eu<sup>3+</sup> ions. The PL decay curve can be fitted into a double exponential function and the average lifetime is about 0.5 ms.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123397920","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6271038
Yongtao Du, Guoping Zhang
We propose and demonstrate a simple design of 2-to-1 photonic data selector based on cross-phase modulation in highly nonlinear fiber. Correct output logic signals are obtained at 10Gbit/s using the nonreturn-to-zero input signals, without using any additional input light beam. The scheme would be a promising candidate for future ultrafast all-optical signal processing applications.
{"title":"Photonic Data Selector Based on Cross-Phase Modulation in a Highly Nonlinear Fiber","authors":"Yongtao Du, Guoping Zhang","doi":"10.1109/SOPO.2012.6271038","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6271038","url":null,"abstract":"We propose and demonstrate a simple design of 2-to-1 photonic data selector based on cross-phase modulation in highly nonlinear fiber. Correct output logic signals are obtained at 10Gbit/s using the nonreturn-to-zero input signals, without using any additional input light beam. The scheme would be a promising candidate for future ultrafast all-optical signal processing applications.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126507262","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6271056
Huai-Yi Chen, Shancheng Xu, Kai-Chun Yang
A high efficiency "uniform" grating coupler with gradually etched grooves was designed on a silicon-on-insulator substrate without experimental demonstration. For TE polarized coupling of an optical fiber at the wavelength of 1.55 μm, the fiber coupling efficiency of our grating coupler is 81%, output coupling angle is 8 degrees and 1dB spectral bandwidth is 80 nm. This performance is superior to the traditional uniform grating coupler without gradually etched grooves. Besides, our high efficiency broadband grating coupler is much easier to design than the already proposed "non-uniform" grating coupler fabricated using the lag effect of dry etching.
{"title":"Design of a Highly Efficient Uniform Grating Coupler with Gradually Etched Grooves for Silicon-on-Insulator Waveguides","authors":"Huai-Yi Chen, Shancheng Xu, Kai-Chun Yang","doi":"10.1109/SOPO.2012.6271056","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6271056","url":null,"abstract":"A high efficiency \"uniform\" grating coupler with gradually etched grooves was designed on a silicon-on-insulator substrate without experimental demonstration. For TE polarized coupling of an optical fiber at the wavelength of 1.55 μm, the fiber coupling efficiency of our grating coupler is 81%, output coupling angle is 8 degrees and 1dB spectral bandwidth is 80 nm. This performance is superior to the traditional uniform grating coupler without gradually etched grooves. Besides, our high efficiency broadband grating coupler is much easier to design than the already proposed \"non-uniform\" grating coupler fabricated using the lag effect of dry etching.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122572135","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270962
J. Zhao, Li-Ming Zhao
The second harmonic generation (SHG) from one-dimensional periodic optical superlattice embedded into air is studied. It is found that the SHG conversion efficiency can be modulated by the field of fundamental wave (FW). In order to investigate the effect of the FW on the SHG, nonlinear non-polarized material is added in back of a crystal and the corresponding SHG conversion efficiency is calculated. Results show that the SHG conversion efficiency can be enhanced significantly when transmission resonance takes place, however, for different resonant peaks the values are different. In addition, the SHG conversion efficiencies can be modulated about 5 times by adjusting the thickness of added material.
{"title":"The Enhancement of Second Harmonic Generation Modulated by the Field of Fundamental Wave","authors":"J. Zhao, Li-Ming Zhao","doi":"10.1109/SOPO.2012.6270962","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270962","url":null,"abstract":"The second harmonic generation (SHG) from one-dimensional periodic optical superlattice embedded into air is studied. It is found that the SHG conversion efficiency can be modulated by the field of fundamental wave (FW). In order to investigate the effect of the FW on the SHG, nonlinear non-polarized material is added in back of a crystal and the corresponding SHG conversion efficiency is calculated. Results show that the SHG conversion efficiency can be enhanced significantly when transmission resonance takes place, however, for different resonant peaks the values are different. In addition, the SHG conversion efficiencies can be modulated about 5 times by adjusting the thickness of added material.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121840088","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270990
C. Jing, J. Chu, P. H. Hopchev, Wei Sun, Yi Li
CO2 laser (wavelength 10.6 μm) has important applications in laser surgery, material processing, infrared sensors and imaging. CO2 laser optical waveguides are gaining a central position in these applications. Glass-drawing technique and sol-gel methods have been used to prepare GeO2 and germania-based glass hollow waveguides. In this work, a GeO2 glass hollow waveguide sample was fabricated by using a liquid phase deposition (LPD) approach. The morphology, structure and optical transmission properties of the sample were studied. The results indicate that a GeO2 glass reflective layer could be formed on the inner wall of a silica glass capillary tube via the LPD process. The GeO2 glass layer and the substrate silica glass tube constitute an attenuated total reflectance (ATR) hollow waveguide structure. An nr<;1 band centering at around 10.6 μm is observed by loss spectrum analysis of the sample. The sample shows a mean loss of 1.13 dB/m for delivery of a ~35 W CO2 laser beam (TEM00).
{"title":"Liquid Phase Deposition of GeO2 Glass Hollow Waveguide for Delivery of CO2 Laser Radiation","authors":"C. Jing, J. Chu, P. H. Hopchev, Wei Sun, Yi Li","doi":"10.1109/SOPO.2012.6270990","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270990","url":null,"abstract":"CO2 laser (wavelength 10.6 μm) has important applications in laser surgery, material processing, infrared sensors and imaging. CO2 laser optical waveguides are gaining a central position in these applications. Glass-drawing technique and sol-gel methods have been used to prepare GeO2 and germania-based glass hollow waveguides. In this work, a GeO2 glass hollow waveguide sample was fabricated by using a liquid phase deposition (LPD) approach. The morphology, structure and optical transmission properties of the sample were studied. The results indicate that a GeO2 glass reflective layer could be formed on the inner wall of a silica glass capillary tube via the LPD process. The GeO2 glass layer and the substrate silica glass tube constitute an attenuated total reflectance (ATR) hollow waveguide structure. An nr<;1 band centering at around 10.6 μm is observed by loss spectrum analysis of the sample. The sample shows a mean loss of 1.13 dB/m for delivery of a ~35 W CO2 laser beam (TEM00).","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125173189","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6271002
Baojian Zhang, Jun Ju Zhang, Huifa Xu, Zhuang Miao, Feng Liu
According to the infrared imaging mechanism, this paper proposes a Nonuniformity Correction (NUC) enhancement method to improving the image quality of Infrared system. analyzing the connection between the responsivety and the nonuniformity of each pixel on infrared focal plane array (IRFPA), gain and offset coefficients were updated gradually, calculating the image of a scene threshold gray level information, a new histogram was constructed. which makes this ideal can be implemented by FPGA. the experimental results indicated that this method can improve the quality of imaging for infrared system and applied to real-time hardware system.
{"title":"A Nonuniformity Correction Enhancement Method Based on Temporal Statistical for Infrared System","authors":"Baojian Zhang, Jun Ju Zhang, Huifa Xu, Zhuang Miao, Feng Liu","doi":"10.1109/SOPO.2012.6271002","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6271002","url":null,"abstract":"According to the infrared imaging mechanism, this paper proposes a Nonuniformity Correction (NUC) enhancement method to improving the image quality of Infrared system. analyzing the connection between the responsivety and the nonuniformity of each pixel on infrared focal plane array (IRFPA), gain and offset coefficients were updated gradually, calculating the image of a scene threshold gray level information, a new histogram was constructed. which makes this ideal can be implemented by FPGA. the experimental results indicated that this method can improve the quality of imaging for infrared system and applied to real-time hardware system.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114266766","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270561
Shanshan Xing, Youli Yu, Xiaolin Zhang
The mean refractive index of liquid biological tissue is discussed by the example of human blood tissue composed of blood corpuscles and blood plasma. The scattering and transmission of light is respectively considered in order to calculate the mean refractive index of human blood. The result is compared with the reported values. It shows that the transmission of light should be firstly considered to get the mean refractive index of liquid biological tissue. The method will also be of referential importance for indirect measurement of refractive index of solid biological tissue.
{"title":"Calculation of the Refractive Index of Fluid Biological Tissue Composed of Cells Unites","authors":"Shanshan Xing, Youli Yu, Xiaolin Zhang","doi":"10.1109/SOPO.2012.6270561","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270561","url":null,"abstract":"The mean refractive index of liquid biological tissue is discussed by the example of human blood tissue composed of blood corpuscles and blood plasma. The scattering and transmission of light is respectively considered in order to calculate the mean refractive index of human blood. The result is compared with the reported values. It shows that the transmission of light should be firstly considered to get the mean refractive index of liquid biological tissue. The method will also be of referential importance for indirect measurement of refractive index of solid biological tissue.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125224222","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270431
T. Feng, F. Yan, Qi Li, W. Peng, S. Tan, S. Feng, X. Wen
A stable high signal to noise ratio (SNR) narrow linewidth linear cavity single-wavelength Er-doped fiber laser is reported. In the experiment, we used a fiber Bragg grating Fabry-Perot (FBG F-P) etalon and a Fiber Loop Mirror (FLM) as the reflectors of the laser cavity, and used a length of 4m Er-doped fiber as the saturable absorber to suppress mode hopping and stabilize frequency effectively. An all fiber polarization controller (PC) was used to restrain spatial hole burning effect in gain fiber. Using a length of 3m Er-doped fiber pumped by a laser diode at 975nm, stable single-wavelength laser at 1544.714nm was acquired, and the 3dB linewidth of laser was 0.013nm. The corresponding threshold of laser was 30mW, the SNR was as high as 70dB, and the slope efficiency was about 0.5%.
{"title":"Stable High SNR Narrow Linewidth Linear Cavity Single-Wavelength Er-Doped Fiber Laser","authors":"T. Feng, F. Yan, Qi Li, W. Peng, S. Tan, S. Feng, X. Wen","doi":"10.1109/SOPO.2012.6270431","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270431","url":null,"abstract":"A stable high signal to noise ratio (SNR) narrow linewidth linear cavity single-wavelength Er-doped fiber laser is reported. In the experiment, we used a fiber Bragg grating Fabry-Perot (FBG F-P) etalon and a Fiber Loop Mirror (FLM) as the reflectors of the laser cavity, and used a length of 4m Er-doped fiber as the saturable absorber to suppress mode hopping and stabilize frequency effectively. An all fiber polarization controller (PC) was used to restrain spatial hole burning effect in gain fiber. Using a length of 3m Er-doped fiber pumped by a laser diode at 975nm, stable single-wavelength laser at 1544.714nm was acquired, and the 3dB linewidth of laser was 0.013nm. The corresponding threshold of laser was 30mW, the SNR was as high as 70dB, and the slope efficiency was about 0.5%.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133421750","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270932
Weizhong Li, Zhihui Xu, Hao Lv
In this paper, a new type compound cavity semiconductor laser is designed and the several important parameters, such as threshold gain, coupling efficiency, surface reflectivity and composite cavity length, are discussed. Research results indicate the narrow linewidth semiconductor laser compound cavity can be achieved narrow linewidth 10-4.
{"title":"Research on the Characteristics of Compound Cavity Semiconductor Laser with Narrow Linewidth","authors":"Weizhong Li, Zhihui Xu, Hao Lv","doi":"10.1109/SOPO.2012.6270932","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270932","url":null,"abstract":"In this paper, a new type compound cavity semiconductor laser is designed and the several important parameters, such as threshold gain, coupling efficiency, surface reflectivity and composite cavity length, are discussed. Research results indicate the narrow linewidth semiconductor laser compound cavity can be achieved narrow linewidth 10-4.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131857644","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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