Pub Date : 2012-12-13DOI: 10.1109/PGC.2012.6457946
V. Mauroy, W. Blanc, M. Ude, S. Trzesien, B. Dussardier, C. Guillermier, X. Bidault, S. Chaussedent
Rare earth (RE) doped silica-based optical fibres with transparent glass ceramic (TGC) core were fabricated through the well-known modified chemical vapor deposition (MCVD) process without going through the commonly used stage of post-ceramming. The main characteristics of the RE-doped dielectric nanoparticles (DNP), their density and mean diameter in the fibres are dictated by various parameters. This paper reports on progresses in the fine characterization of the nanoparticles, particularly their dimensions and composition, using nanoscale mass spectroscopy and molecular dynamics modeling, and alteration of the spectroscopic properties of the erbium ions embedded within the phospho-silicate DNP. These results permit to get more insight into the complex process of the DNP self-nucleation and growth during the fibre fabrication process. This fabrication route could have important potentials in improving rare-earth-doped fibre amplifiers and laser sources.
{"title":"Erbium-doped transparent glass ceramic optical fibres: Characterization using mass spectroscopy and molecular dynamics modeling","authors":"V. Mauroy, W. Blanc, M. Ude, S. Trzesien, B. Dussardier, C. Guillermier, X. Bidault, S. Chaussedent","doi":"10.1109/PGC.2012.6457946","DOIUrl":"https://doi.org/10.1109/PGC.2012.6457946","url":null,"abstract":"Rare earth (RE) doped silica-based optical fibres with transparent glass ceramic (TGC) core were fabricated through the well-known modified chemical vapor deposition (MCVD) process without going through the commonly used stage of post-ceramming. The main characteristics of the RE-doped dielectric nanoparticles (DNP), their density and mean diameter in the fibres are dictated by various parameters. This paper reports on progresses in the fine characterization of the nanoparticles, particularly their dimensions and composition, using nanoscale mass spectroscopy and molecular dynamics modeling, and alteration of the spectroscopic properties of the erbium ions embedded within the phospho-silicate DNP. These results permit to get more insight into the complex process of the DNP self-nucleation and growth during the fibre fabrication process. This fabrication route could have important potentials in improving rare-earth-doped fibre amplifiers and laser sources.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"177 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134313021","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.2012.6458084
C. Qiu, Jianyi Yang, Xiaoqing Jiang
An on-chip interrogator for wavelength-modulated optical sensors is developed based on a thermal tunable silicon microring resonator. The center wavelength of the sensors can be readout from the tuning power corresponding to the peak optical output intensity of the system by scanning the resonant wavelength of the microring filter. Both on-chip (microring) and off-chip (FBG) wavelength-modulated sensor are interrogated by our microring interrogator.
{"title":"On-chip integrated interrogator based on silicon microring resonator","authors":"C. Qiu, Jianyi Yang, Xiaoqing Jiang","doi":"10.1109/PGC.2012.6458084","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458084","url":null,"abstract":"An on-chip interrogator for wavelength-modulated optical sensors is developed based on a thermal tunable silicon microring resonator. The center wavelength of the sensors can be readout from the tuning power corresponding to the peak optical output intensity of the system by scanning the resonant wavelength of the microring filter. Both on-chip (microring) and off-chip (FBG) wavelength-modulated sensor are interrogated by our microring interrogator.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"252 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":"115620977","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.2012.6458002
D. Nguyen, B. Stiller, M. Lee, J. Beugnot, H. Maillotte, T. Sylvestre, A. Mottet, J. Hauden
We demonstrate a long-range Brillouin optical time-domain analysis (BOTDA) sensor system with a sensing range up to 100-km by combining an anti-Stokes single sideband suppressed-carrier modulation technique with an in line mid-span bidirectional EDFA.
{"title":"Sensitivity enhancement in long-range distributed Brillouin fiber sensor using an anti-Stokes single-sideband probe and a bidirectional EDFA","authors":"D. Nguyen, B. Stiller, M. Lee, J. Beugnot, H. Maillotte, T. Sylvestre, A. Mottet, J. Hauden","doi":"10.1109/PGC.2012.6458002","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458002","url":null,"abstract":"We demonstrate a long-range Brillouin optical time-domain analysis (BOTDA) sensor system with a sensing range up to 100-km by combining an anti-Stokes single sideband suppressed-carrier modulation technique with an in line mid-span bidirectional EDFA.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"680 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":"123051485","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.2012.6458021
S. Gunapala, S. Rafol, D. Ting, A. Soibel, J. Liu, A. Khoshakhlagh, S. Keo, J. Mumolo
We describe the demonstration of a ¼ VGA format long-wavelength infrared focal plane array based on an InAs/GaSb superlattice absorber surrounded by an electron-blocking and a hole-blocking unipolar barrier. An 8.8 μm cutoff focal plane without antireflection coating based on this complementary barrier infrared detector design has yielded noise equivalent differential temperature of 18.6 mK at operating temperature of 80K, with 300 K background and f/2 cold-stop.
{"title":"High performance GaSb/InAs superlattice long-wave infrared focal plane array","authors":"S. Gunapala, S. Rafol, D. Ting, A. Soibel, J. Liu, A. Khoshakhlagh, S. Keo, J. Mumolo","doi":"10.1109/PGC.2012.6458021","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458021","url":null,"abstract":"We describe the demonstration of a ¼ VGA format long-wavelength infrared focal plane array based on an InAs/GaSb superlattice absorber surrounded by an electron-blocking and a hole-blocking unipolar barrier. An 8.8 μm cutoff focal plane without antireflection coating based on this complementary barrier infrared detector design has yielded noise equivalent differential temperature of 18.6 mK at operating temperature of 80K, with 300 K background and f/2 cold-stop.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"77 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":"123134231","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.2012.6457981
Ke Wang, A. Nirmalathas, C. Lim, E. Skafidas, K. Alameh
Free-space based card-to-card optical interconnects are promising candidates for the provision of parallel high-speed and reconfigurable interconnectivity in data-centers and high-performance computing clusters. However, the atmospheric turbulence may degrade the interconnect performance due to the beam wander, signal scintillation, and beam broadening effects. In this paper, the experimental investigation of the impact of both moderate and comparatively strong atmospheric turbulence on the bit-error-rate (BER) performance of our proposed reconfigurable free-space card-to-card optical interconnects is presented. Experimental results show that the BER performance does suffer power penalties of ~0.5 dB and ~1.6 dB at BER of 10-9 under moderate and strong levels of turbulence respectively.
{"title":"Performance of reconfigurable free-space card-to-card optical interconnects under atmospheric turbulence","authors":"Ke Wang, A. Nirmalathas, C. Lim, E. Skafidas, K. Alameh","doi":"10.1109/PGC.2012.6457981","DOIUrl":"https://doi.org/10.1109/PGC.2012.6457981","url":null,"abstract":"Free-space based card-to-card optical interconnects are promising candidates for the provision of parallel high-speed and reconfigurable interconnectivity in data-centers and high-performance computing clusters. However, the atmospheric turbulence may degrade the interconnect performance due to the beam wander, signal scintillation, and beam broadening effects. In this paper, the experimental investigation of the impact of both moderate and comparatively strong atmospheric turbulence on the bit-error-rate (BER) performance of our proposed reconfigurable free-space card-to-card optical interconnects is presented. Experimental results show that the BER performance does suffer power penalties of ~0.5 dB and ~1.6 dB at BER of 10-9 under moderate and strong levels of turbulence respectively.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"39 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":"121810299","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.2012.6457964
A. Keshavarz, N. Zamani, F. Emami
In this paper, the optical gain in symmetric double semi-parabolic quantum well laser is calculated for typical GaAs/AlxGa1-xAs. For this purpose, numerical solution of the Schrödinger equation is done in order to obtain the energy levels and their corresponding wave functions of electrons and holes in double semi-parabolic quantum well. Results are used to obtain the optical gain of this nanostructure. The effects of material parameters such as thickness of the barrier and width of the wells, Al composition and density of the carriers as well as external parameters such as temperature and pressure on the optical gain coefficient are investigated. Numerical results clearly show that by increasing of carrier concentration, wells width and decreasing the thickness of barrier, temperature and pressure the optical gain increases. Finally, we introduce the optimum structure of quantum well to obtain the maximum optical gain, which can be useful for quantum well laser designing.
{"title":"Investigation of optical gain in AlGaAs/GaAs symmetric double semi-parabolic quantum well laser","authors":"A. Keshavarz, N. Zamani, F. Emami","doi":"10.1109/PGC.2012.6457964","DOIUrl":"https://doi.org/10.1109/PGC.2012.6457964","url":null,"abstract":"In this paper, the optical gain in symmetric double semi-parabolic quantum well laser is calculated for typical GaAs/AlxGa1-xAs. For this purpose, numerical solution of the Schrödinger equation is done in order to obtain the energy levels and their corresponding wave functions of electrons and holes in double semi-parabolic quantum well. Results are used to obtain the optical gain of this nanostructure. The effects of material parameters such as thickness of the barrier and width of the wells, Al composition and density of the carriers as well as external parameters such as temperature and pressure on the optical gain coefficient are investigated. Numerical results clearly show that by increasing of carrier concentration, wells width and decreasing the thickness of barrier, temperature and pressure the optical gain increases. Finally, we introduce the optimum structure of quantum well to obtain the maximum optical gain, which can be useful for quantum well laser designing.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"72 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":"116923004","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.2012.6457930
C. Marques, L. Bilro, L. Khan, R. A. Oliveira, D. Webb, R. Nogueira
A fine control of the mPOF Bragg grating spectrum properties, such as maximum reflected power and 3dB bandwidth, through acousto-optic modulation (AOM) using flexural regime is presented. A numerical comparison of the strain field along mPOFBG - AOM and the similar structure with SMFBG-AOM was presented, showing that the strain field amplitude is higher along the mPOFBG due to its smaller mechanical stiffness. The obtained results can be used in the development of fine-tuned optical filters using low voltage sources and low frequency regimes, to obtain tunable optical filters and to control the shape of the spectrum. Studies of the behavior in different gratings (such as phase shifted and long period gratings) for photonic applications, such as tunable notch filters or tunable cavities, are in progress. It can potentially be applied on tunable optical filters for POF transmission.
{"title":"Controlling the properties of microstructured plastic optical fiber Bragg gratings using acousto-optic excitation","authors":"C. Marques, L. Bilro, L. Khan, R. A. Oliveira, D. Webb, R. Nogueira","doi":"10.1109/PGC.2012.6457930","DOIUrl":"https://doi.org/10.1109/PGC.2012.6457930","url":null,"abstract":"A fine control of the mPOF Bragg grating spectrum properties, such as maximum reflected power and 3dB bandwidth, through acousto-optic modulation (AOM) using flexural regime is presented. A numerical comparison of the strain field along mPOFBG - AOM and the similar structure with SMFBG-AOM was presented, showing that the strain field amplitude is higher along the mPOFBG due to its smaller mechanical stiffness. The obtained results can be used in the development of fine-tuned optical filters using low voltage sources and low frequency regimes, to obtain tunable optical filters and to control the shape of the spectrum. Studies of the behavior in different gratings (such as phase shifted and long period gratings) for photonic applications, such as tunable notch filters or tunable cavities, are in progress. It can potentially be applied on tunable optical filters for POF transmission.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"4 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":"120935780","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.2012.6458013
A. Lim, T. Liow, N. Duan, Kok-Kiong Chen, R. P. Tern, G. Lo
We investigated the impact of contact engineering for Germanium photodetectors performance optimization. Split contacts increased the PD responsivity by ~2 times when compared to rectangle or island block contacts. In addition, dark current and bandwidth was shown to be highly dependent on n++ doping region whereby there is a trade-off for both parameters. From this work, a route to high responsivity and high speed detector can be achieved.
{"title":"Performance optimization of waveguided germanium pin photodetector for optical communication applications","authors":"A. Lim, T. Liow, N. Duan, Kok-Kiong Chen, R. P. Tern, G. Lo","doi":"10.1109/PGC.2012.6458013","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458013","url":null,"abstract":"We investigated the impact of contact engineering for Germanium photodetectors performance optimization. Split contacts increased the PD responsivity by ~2 times when compared to rectangle or island block contacts. In addition, dark current and bandwidth was shown to be highly dependent on n++ doping region whereby there is a trade-off for both parameters. From this work, a route to high responsivity and high speed detector can be achieved.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"32 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":"126045130","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.2012.6458049
U. Laudyn, F. Sala, K. Rutkowska, M. Sierakowski, M. Karpierz
We report on the experimental and numerical results of the light induced waveguide in planar samples of chiral nematic liquid crystals.
本文报道了手性向列液晶平面样品中光诱导波导的实验和数值结果。
{"title":"Light induced waveguide in chiral nematic liquid crystals","authors":"U. Laudyn, F. Sala, K. Rutkowska, M. Sierakowski, M. Karpierz","doi":"10.1109/PGC.2012.6458049","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458049","url":null,"abstract":"We report on the experimental and numerical results of the light induced waveguide in planar samples of chiral nematic liquid crystals.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"4 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":"123713448","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.2012.6458088
H. Wei, Xinben Zhang, Jiang Li, Yang Liu, W. Tong, Jinyan Li
A simplified hollow-core microstructured fiber was fabricated and investigated. The diameter of the core is about 31 μm, and the thickness of the bridges t is about 280 nm. Three broad band transmission windows with relative low loss were measured in IR domain with the large bandwidth of ~600 nm. A Gaussian-shaped beam profile with visible pattern guided by the large core was observed in far field. The curvature behavior was also studied. This large core broad band transmission fiber offers a good medium for applications in high energy delivery, novel gas-cell based laser and sensing devices.
{"title":"Fabrication and characteristic of a simplified hollow-core microstructured fiber","authors":"H. Wei, Xinben Zhang, Jiang Li, Yang Liu, W. Tong, Jinyan Li","doi":"10.1109/PGC.2012.6458088","DOIUrl":"https://doi.org/10.1109/PGC.2012.6458088","url":null,"abstract":"A simplified hollow-core microstructured fiber was fabricated and investigated. The diameter of the core is about 31 μm, and the thickness of the bridges t is about 280 nm. Three broad band transmission windows with relative low loss were measured in IR domain with the large bandwidth of ~600 nm. A Gaussian-shaped beam profile with visible pattern guided by the large core was observed in far field. The curvature behavior was also studied. This large core broad band transmission fiber offers a good medium for applications in high energy delivery, novel gas-cell based laser and sensing devices.","PeriodicalId":158783,"journal":{"name":"2012 Photonics Global Conference (PGC)","volume":"62 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":"126610094","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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