Pub Date : 2013-12-01DOI: 10.1109/WRAP.2013.6917647
N. Gupta, V. Janyani
Light trapping in the thin film solar cell has been studied for a while and is considered as among the most important parameter which may reduce the gap between the most efficient single junction thin film solar cell available till date and the theoretical Shockley-Queisser (SQ) Limit. Usually, metallic back reflectors are being used for the thin film solar cells. Here we are presenting an alternative method for single junction thin film GaAs solar cell using photonic crystals as a back reflecting mirror. We have used the photonic crystals (PhC) structure having GaAs rods having SiO2 in the background, which has improved absorption in the near band edge wavelength. The results of the numerical modelling using FDTD algorithm clearly indicate the efficiency improvement as compared to the metallic reflector as back mirror material.
{"title":"Efficiency enhancement in the thin film GaAs solar cell using photonic crystal as a back reflector","authors":"N. Gupta, V. Janyani","doi":"10.1109/WRAP.2013.6917647","DOIUrl":"https://doi.org/10.1109/WRAP.2013.6917647","url":null,"abstract":"Light trapping in the thin film solar cell has been studied for a while and is considered as among the most important parameter which may reduce the gap between the most efficient single junction thin film solar cell available till date and the theoretical Shockley-Queisser (SQ) Limit. Usually, metallic back reflectors are being used for the thin film solar cells. Here we are presenting an alternative method for single junction thin film GaAs solar cell using photonic crystals as a back reflecting mirror. We have used the photonic crystals (PhC) structure having GaAs rods having SiO2 in the background, which has improved absorption in the near band edge wavelength. The results of the numerical modelling using FDTD algorithm clearly indicate the efficiency improvement as compared to the metallic reflector as back mirror material.","PeriodicalId":386455,"journal":{"name":"Workshop on Recent Advances in Photonics (WRAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121153551","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 : 2013-12-01DOI: 10.1109/WRAP.2013.6917694
M. Reddikumar, K. Bose, R. Poddar
Estimation of the blood oxygen saturation in human retina has been done by using FDOCT data. This was achieved by using 1060 nm as central wavelength, 120 nm as bandwidth, which is optimized wavelength for imaging biological samples. Least squares method was implemented for data analysis. The estimated results of blood oxygen saturation levels in an artery and the veins are well comparable with existing methods, hence one can adopt this technique for the measurement of oxygen saturation levels of blood in in vivo.
{"title":"Blood oxygen saturation measurement in human retina by using 1060 nm fourier domain optical coherence tomography (FD-OCT)","authors":"M. Reddikumar, K. Bose, R. Poddar","doi":"10.1109/WRAP.2013.6917694","DOIUrl":"https://doi.org/10.1109/WRAP.2013.6917694","url":null,"abstract":"Estimation of the blood oxygen saturation in human retina has been done by using FDOCT data. This was achieved by using 1060 nm as central wavelength, 120 nm as bandwidth, which is optimized wavelength for imaging biological samples. Least squares method was implemented for data analysis. The estimated results of blood oxygen saturation levels in an artery and the veins are well comparable with existing methods, hence one can adopt this technique for the measurement of oxygen saturation levels of blood in in vivo.","PeriodicalId":386455,"journal":{"name":"Workshop on Recent Advances in Photonics (WRAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123349579","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 : 2013-12-01DOI: 10.1109/WRAP.2013.6917672
M. Kumar, Arun Kumar, S. Tripathi
We examine the effect of refractive index profile on the critical wavelength in SMS structures showing that its location as well as the nature depends very much on the refractive index profile of MMF.
{"title":"Effect of refractive index profile of MMF on the critical wavelength in SMS fiber structures","authors":"M. Kumar, Arun Kumar, S. Tripathi","doi":"10.1109/WRAP.2013.6917672","DOIUrl":"https://doi.org/10.1109/WRAP.2013.6917672","url":null,"abstract":"We examine the effect of refractive index profile on the critical wavelength in SMS structures showing that its location as well as the nature depends very much on the refractive index profile of MMF.","PeriodicalId":386455,"journal":{"name":"Workshop on Recent Advances in Photonics (WRAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122943768","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 : 2013-12-01DOI: 10.1109/WRAP.2013.6917628
K. Gehlot, Anurag Sharma
We present an approximate analysis of a vertical slot waveguide using semi-vector VOPT method. Effect of waveguide parameters on power confinement in the slot region is studied. Results show good agreement with rigorous numerical results.
{"title":"Modal analysis of silicon-based slot waveguide using approximate semi-vector analysis","authors":"K. Gehlot, Anurag Sharma","doi":"10.1109/WRAP.2013.6917628","DOIUrl":"https://doi.org/10.1109/WRAP.2013.6917628","url":null,"abstract":"We present an approximate analysis of a vertical slot waveguide using semi-vector VOPT method. Effect of waveguide parameters on power confinement in the slot region is studied. Results show good agreement with rigorous numerical results.","PeriodicalId":386455,"journal":{"name":"Workshop on Recent Advances in Photonics (WRAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123057594","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 : 2013-12-01DOI: 10.1109/WRAP.2013.6917645
K. Thirupathaiah, B. Iyer, N. Pathak, V. Rastogi
This paper reports simulation of nano plasmonic MIM stepped width resonator (SWR) based BPF having two resonators and a dual band impedance inverter. Simulation results confirms the presence of pass bands at 1350-nm and 1650-nm.
{"title":"Design and simulation of plasmonic MIM slot waveguide based dualband bandpass filter","authors":"K. Thirupathaiah, B. Iyer, N. Pathak, V. Rastogi","doi":"10.1109/WRAP.2013.6917645","DOIUrl":"https://doi.org/10.1109/WRAP.2013.6917645","url":null,"abstract":"This paper reports simulation of nano plasmonic MIM stepped width resonator (SWR) based BPF having two resonators and a dual band impedance inverter. Simulation results confirms the presence of pass bands at 1350-nm and 1650-nm.","PeriodicalId":386455,"journal":{"name":"Workshop on Recent Advances in Photonics (WRAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115567042","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 : 2013-12-01DOI: 10.1109/WRAP.2013.6917679
V. Srivastava, M. Inam, B. Singh, D. Mehta
We report corneal topography of fish eye using low coherence interference microscopy. This technique is non-invasive determination of refractive index variation which will be helpful in finding corneal power as a function of wavelength.
{"title":"High-resolution corneal topography and tomography of fish eye using full-field white light interference microscopy with color fringe analysis","authors":"V. Srivastava, M. Inam, B. Singh, D. Mehta","doi":"10.1109/WRAP.2013.6917679","DOIUrl":"https://doi.org/10.1109/WRAP.2013.6917679","url":null,"abstract":"We report corneal topography of fish eye using low coherence interference microscopy. This technique is non-invasive determination of refractive index variation which will be helpful in finding corneal power as a function of wavelength.","PeriodicalId":386455,"journal":{"name":"Workshop on Recent Advances in Photonics (WRAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115758863","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 : 2013-12-01DOI: 10.1109/WRAP.2013.6917677
Y. Kumar, M. Shenoy
We studied, dependence of important operational parameter viz. gain, gain spectrum and recovery time, on length of the active region in SOA using Connelly model. Studies indicate, need to choose optimum length for better performance.
{"title":"Studies on length dependence of operational parameters in semiconductor optical amplifier","authors":"Y. Kumar, M. Shenoy","doi":"10.1109/WRAP.2013.6917677","DOIUrl":"https://doi.org/10.1109/WRAP.2013.6917677","url":null,"abstract":"We studied, dependence of important operational parameter viz. gain, gain spectrum and recovery time, on length of the active region in SOA using Connelly model. Studies indicate, need to choose optimum length for better performance.","PeriodicalId":386455,"journal":{"name":"Workshop on Recent Advances in Photonics (WRAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114769463","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 : 2013-12-01DOI: 10.1109/WRAP.2013.6917713
U. Tiwari, S. S. Pal, G. Poddar, R. Bhatnagar
Experimental characterization of a fiber Bragg grating sensor probe has been carried out for cryo-temperature monitoring. The temperature sensitivity was found to be 16.7 pm/°C at room temperature and 90 pm/°C pm/°C near liquid nitrogen temperature.
{"title":"Study of FBG sensors for cryo temperature monitoring","authors":"U. Tiwari, S. S. Pal, G. Poddar, R. Bhatnagar","doi":"10.1109/WRAP.2013.6917713","DOIUrl":"https://doi.org/10.1109/WRAP.2013.6917713","url":null,"abstract":"Experimental characterization of a fiber Bragg grating sensor probe has been carried out for cryo-temperature monitoring. The temperature sensitivity was found to be 16.7 pm/°C at room temperature and 90 pm/°C pm/°C near liquid nitrogen temperature.","PeriodicalId":386455,"journal":{"name":"Workshop on Recent Advances in Photonics (WRAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122135716","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 : 2013-12-01DOI: 10.1109/WRAP.2013.6917624
B. Singh, D. Mehta, P. Senthilkumaran, R. Singh
Controlled generation of the periodic polarization structure by interferometer is investigated. Periodic polarization structure is generated by interference of two spatially separated orthogonally polarized beams. Advantage of this technique is discussed and results are presented.
{"title":"Controlled generation of periodic polarization structure by interference","authors":"B. Singh, D. Mehta, P. Senthilkumaran, R. Singh","doi":"10.1109/WRAP.2013.6917624","DOIUrl":"https://doi.org/10.1109/WRAP.2013.6917624","url":null,"abstract":"Controlled generation of the periodic polarization structure by interferometer is investigated. Periodic polarization structure is generated by interference of two spatially separated orthogonally polarized beams. Advantage of this technique is discussed and results are presented.","PeriodicalId":386455,"journal":{"name":"Workshop on Recent Advances in Photonics (WRAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114976266","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 : 2013-12-01DOI: 10.1109/WRAP.2013.6917682
A. Kapoor, E. Sharma
Erbium doped fiber amplifier is a key device in WDM/DWDM technology. The task of modeling EDFA is computationally expensive. In this paper we investigate the application of multilayered feed-forward neural network to model an EDFA.
{"title":"Neural network modelling of EDFA","authors":"A. Kapoor, E. Sharma","doi":"10.1109/WRAP.2013.6917682","DOIUrl":"https://doi.org/10.1109/WRAP.2013.6917682","url":null,"abstract":"Erbium doped fiber amplifier is a key device in WDM/DWDM technology. The task of modeling EDFA is computationally expensive. In this paper we investigate the application of multilayered feed-forward neural network to model an EDFA.","PeriodicalId":386455,"journal":{"name":"Workshop on Recent Advances in Photonics (WRAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115455051","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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