Pub Date : 2012-12-01DOI: 10.1109/PGC.2012.6458022
Chan-Young Kim, I. Song, T. Ahn
In this study, we proved that the phase component of the Fourier transform is more reliable and precise than the amplitude component of the transform for differential mode group delay measurement by optical spectral domain reflectometry.
{"title":"Differential mode group delay measurement for fewmode fiber using phase-sensitive intermodal spectral domain interferometer","authors":"Chan-Young Kim, I. Song, T. Ahn","doi":"10.1109/PGC.2012.6458022","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458022","url":null,"abstract":"In this study, we proved that the phase component of the Fourier transform is more reliable and precise than the amplitude component of the transform for differential mode group delay measurement by optical spectral domain reflectometry.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"31 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128115008","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 : 2012-12-01DOI: 10.1109/PGC.2012.6457971
Jiang Lianxi, Song Junfeng, Tu Xiaoguang, Yu Mingbin, P. Lo
We analyzed the continuous wave pumped FWM in the ring resonator based on SOI platform. The FWM effect and the resonance effect of the ring were combined in the same model to form simultaneous equations and iterative method was used to solve the implicit equations. Different from the previous methods, the nonlinear phase shift caused by SPM, XPM and free carrier plasma dispersion effect, the linear propagation loss and the nonlinear loss caused by TPA and FCA, the dispersion effect of the waveguide were all taken into consideration. According to this model, an interesting de-resonance phenomenon was predicted and its constraint to the conversion efficiency was also analyzed. The spectrum response became a FANO like profile and the response wavelength shift of the pump wavelength was no longer the quadratic relationship with the coupled optical power, while the signal wavelength shift still kept the relationship. As the increase of the pump power, the conversion efficiency of the idler first increased and reached the maximum, but then the conversion efficiency reduced as further increase of the pump power.
{"title":"Numerical analysis of the four-wavelength-mixing (FWM) in the ring-resonator on SOI","authors":"Jiang Lianxi, Song Junfeng, Tu Xiaoguang, Yu Mingbin, P. Lo","doi":"10.1109/PGC.2012.6457971","DOIUrl":"https://doi.org/10.1109/PGC.2012.6457971","url":null,"abstract":"We analyzed the continuous wave pumped FWM in the ring resonator based on SOI platform. The FWM effect and the resonance effect of the ring were combined in the same model to form simultaneous equations and iterative method was used to solve the implicit equations. Different from the previous methods, the nonlinear phase shift caused by SPM, XPM and free carrier plasma dispersion effect, the linear propagation loss and the nonlinear loss caused by TPA and FCA, the dispersion effect of the waveguide were all taken into consideration. According to this model, an interesting de-resonance phenomenon was predicted and its constraint to the conversion efficiency was also analyzed. The spectrum response became a FANO like profile and the response wavelength shift of the pump wavelength was no longer the quadratic relationship with the coupled optical power, while the signal wavelength shift still kept the relationship. As the increase of the pump power, the conversion efficiency of the idler first increased and reached the maximum, but then the conversion efficiency reduced as further increase of the pump power.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124122784","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 : 2012-12-01DOI: 10.1109/PGC.2012.6458035
T. Eltaif, H. Bakarman
In this article, our aim is to investigate passive optical networking (PON) based fiber access systems. An overview of optical OCDMA and optical coding through their features such as increasing the capacity, security and improving the system performance were presented. Modified prime code, which represents a user address and signs each transmitted data bit has been chosen as a signature sequence code because of its good periodic auto/cross correlation properties. However, simulation and theoretically analysis of balanced detection scheme based on passive networking access taking into account the effects of various noises such as shot noise, phase-induced intensity noise (PIIN), thermal noises were presented as well. Results of 25 subscribers sent in C band for the upstream signal with channel spacing 25GHz show good system performance in terms of the bit error rate and suppressing the multiple access interference when variation of fiber length and data rate are applied.
{"title":"Implementation of optical CDMA based on passive optical networks","authors":"T. Eltaif, H. Bakarman","doi":"10.1109/PGC.2012.6458035","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458035","url":null,"abstract":"In this article, our aim is to investigate passive optical networking (PON) based fiber access systems. An overview of optical OCDMA and optical coding through their features such as increasing the capacity, security and improving the system performance were presented. Modified prime code, which represents a user address and signs each transmitted data bit has been chosen as a signature sequence code because of its good periodic auto/cross correlation properties. However, simulation and theoretically analysis of balanced detection scheme based on passive networking access taking into account the effects of various noises such as shot noise, phase-induced intensity noise (PIIN), thermal noises were presented as well. Results of 25 subscribers sent in C band for the upstream signal with channel spacing 25GHz show good system performance in terms of the bit error rate and suppressing the multiple access interference when variation of fiber length and data rate are applied.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"64 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131893415","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 : 2012-12-01DOI: 10.1109/PGC.2012.6458068
Ni Haibin, Wang Ming, Chen Wei, W. Tingting
Polystyrene colloidal crystals and silica inverse opals were assembled on the co-facet of an optical fiber and capillary. Structure design and fabrication steps are demonstrated.
将聚苯乙烯胶体晶体和二氧化硅反蛋白石组装在光纤和毛细管的共面上。演示了结构设计和制造步骤。
{"title":"Assembly photonic crystal arrays on the facet of optical fibers and its applications","authors":"Ni Haibin, Wang Ming, Chen Wei, W. Tingting","doi":"10.1109/PGC.2012.6458068","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458068","url":null,"abstract":"Polystyrene colloidal crystals and silica inverse opals were assembled on the co-facet of an optical fiber and capillary. Structure design and fabrication steps are demonstrated.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128329771","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 : 2012-12-01DOI: 10.1109/PGC.2012.6458102
M. Kowalczyk
There is presenting results successful optical transmission based on the SCM technique. Spectrally effective 64-QAM modulation has been used. Frequency range of the carrier used at the experiment had been changed in a range of 1 to 1.5 GHz, what is well beyond the baseband of used at the experiment MM fiber.
{"title":"A spectral effective transmission beyond a baseband of the multimode fiber","authors":"M. Kowalczyk","doi":"10.1109/PGC.2012.6458102","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458102","url":null,"abstract":"There is presenting results successful optical transmission based on the SCM technique. Spectrally effective 64-QAM modulation has been used. Frequency range of the carrier used at the experiment had been changed in a range of 1 to 1.5 GHz, what is well beyond the baseband of used at the experiment MM fiber.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129692242","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 : 2012-12-01DOI: 10.1109/PGC.2012.6458107
J. Xavier, J. Joseph
In view of new generation integrated photonic devices, we present our computational as well as fabrication results on the investigation of photonic chiral lattices with diverse transversely quasicrystallographic symmetries. As the photonic band gap becomes becomes more symmetric as well as the directional tunability is enhanced in photonic quasi crystals (PQC), they would give an additional degree of freedom for transversely PQC 3D chiral lattices in tuning frequency as well as polarization band gaps for optimized polarization controlled integrated optical devices.
{"title":"Transversely quasicrystallographic 3D photonic chiral lattices: Polarization-controllable complex photonic band gap structures","authors":"J. Xavier, J. Joseph","doi":"10.1109/PGC.2012.6458107","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458107","url":null,"abstract":"In view of new generation integrated photonic devices, we present our computational as well as fabrication results on the investigation of photonic chiral lattices with diverse transversely quasicrystallographic symmetries. As the photonic band gap becomes becomes more symmetric as well as the directional tunability is enhanced in photonic quasi crystals (PQC), they would give an additional degree of freedom for transversely PQC 3D chiral lattices in tuning frequency as well as polarization band gaps for optimized polarization controlled integrated optical devices.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130651716","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 : 2012-12-01DOI: 10.1109/PGC.2012.6458046
K. B. von der Geest, J. Hyvonen, T. Laurila
We present a compact and robust analyzer employing micro-plasma emission spectroscopy for real-time determination of metal concentrations in flowing water samples. The analyzer has been characterized by measuring Na, Mn and Ag at mg/L concentrations. The intensity fluctuations of the emission signals have been significantly reduced by applying the Boltzmann plot method to account for variations in the excitation temperature and the number of emitting particles.
{"title":"Real-time determination of metal concentrations in liquid flows using microplasma emission spectroscopy","authors":"K. B. von der Geest, J. Hyvonen, T. Laurila","doi":"10.1109/PGC.2012.6458046","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458046","url":null,"abstract":"We present a compact and robust analyzer employing micro-plasma emission spectroscopy for real-time determination of metal concentrations in flowing water samples. The analyzer has been characterized by measuring Na, Mn and Ag at mg/L concentrations. The intensity fluctuations of the emission signals have been significantly reduced by applying the Boltzmann plot method to account for variations in the excitation temperature and the number of emitting particles.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131241209","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 : 2012-12-01DOI: 10.1109/PGC.2012.6457919
Xiaoxiao Jiang, Qiongchan Gu, Jiangtao Lv, Yanjun Liu, G. Si, Hongjun Duan, Zhenhe Ma, Fengwen Wang, J. Teng
The focused ion beam technique is a frequently used method to manufacture photonic crystal structures due to its capability of defining patterns in a wide range of materials without using masks. One critical drawback of FIB milling technique is the non-vertical profile resulted from redeposition effects during lithography. Tapered sidewalls may impact the performance of the fabricated device significantly. In a previous work, we have shown it is possible to shape the profile of nanoholes by truncating the seriously tapered bottoms. Here, we report on the re-definition of nanorod photonic crystals using focused ion beam milling. The proposed method is simple and entirely monolithic.
{"title":"Shaping the profile of photonic crystal nanorods","authors":"Xiaoxiao Jiang, Qiongchan Gu, Jiangtao Lv, Yanjun Liu, G. Si, Hongjun Duan, Zhenhe Ma, Fengwen Wang, J. Teng","doi":"10.1109/PGC.2012.6457919","DOIUrl":"https://doi.org/10.1109/PGC.2012.6457919","url":null,"abstract":"The focused ion beam technique is a frequently used method to manufacture photonic crystal structures due to its capability of defining patterns in a wide range of materials without using masks. One critical drawback of FIB milling technique is the non-vertical profile resulted from redeposition effects during lithography. Tapered sidewalls may impact the performance of the fabricated device significantly. In a previous work, we have shown it is possible to shape the profile of nanoholes by truncating the seriously tapered bottoms. Here, we report on the re-definition of nanorod photonic crystals using focused ion beam milling. The proposed method is simple and entirely monolithic.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134345014","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 : 2012-12-01DOI: 10.1109/PGC.2012.6458083
D. Sapkota, M. S. Kayastha, Makoto Takahashi, Koichi Wakita
The absorption spectrum in high-purity GaAs has been theoretically studied in the presence of electric field taking into account of excitonic transition and continuum band transition at room temperature. We have calculated the Stark shift, height of exciton peak, linewidth broadening of exciton, extinction ratio as a function of electric field. We also have compared these results with the experimental results and found the close agreement with experimental.
{"title":"Experimental and theoretical study of excitonic electroabsorption in high-purity GaAs at room temperature","authors":"D. Sapkota, M. S. Kayastha, Makoto Takahashi, Koichi Wakita","doi":"10.1109/PGC.2012.6458083","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458083","url":null,"abstract":"The absorption spectrum in high-purity GaAs has been theoretically studied in the presence of electric field taking into account of excitonic transition and continuum band transition at room temperature. We have calculated the Stark shift, height of exciton peak, linewidth broadening of exciton, extinction ratio as a function of electric field. We also have compared these results with the experimental results and found the close agreement with experimental.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133464672","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 : 2012-12-01DOI: 10.1109/PGC.2012.6457986
Yanyan Zhou, F. Luan, Di Zhu, Xia Yu
A novel whispering gallery mode (WGM) resonator that relies on index profiling instead of shape variation to confine light is proposed and theoretically studied. Analytical derivations show that a parabolic index profile along the resonator axial direction is able to confine light within its two caustics. This enables efficient coupling of WGM by applying evanescent couplers at the caustics.
{"title":"Whispering gallery resonator based on index profiling","authors":"Yanyan Zhou, F. Luan, Di Zhu, Xia Yu","doi":"10.1109/PGC.2012.6457986","DOIUrl":"https://doi.org/10.1109/PGC.2012.6457986","url":null,"abstract":"A novel whispering gallery mode (WGM) resonator that relies on index profiling instead of shape variation to confine light is proposed and theoretically studied. Analytical derivations show that a parabolic index profile along the resonator axial direction is able to confine light within its two caustics. This enables efficient coupling of WGM by applying evanescent couplers at the caustics.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130095977","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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