Pub Date : 2013-07-01DOI: 10.1109/NOC-OCI.2013.6582899
Hossein Kazemi, Z. Mostaani, M. Uysal, Zabih Ghassemlooy
In this paper, we consider a MIMO Free-Space Optical (FSO) communication system over gamma-gamma turbulence channels and derive a closed-form analytical expression for the outage probability taking into account the effects of both the inner scale size of optical channel and the aperture averaging. Our results demonstrate that by increasing the number of transmit and/or receive apertures, the degrading effect of the inner scale size is effectively reduced by extracting the spatial diversity gain of the MIMO scheme. We further provide Monte Carlo simulation results to confirm the validity of the derived expression.
{"title":"Outage performance of MIMO free-space optical systems in gamma-gamma fading channels","authors":"Hossein Kazemi, Z. Mostaani, M. Uysal, Zabih Ghassemlooy","doi":"10.1109/NOC-OCI.2013.6582899","DOIUrl":"https://doi.org/10.1109/NOC-OCI.2013.6582899","url":null,"abstract":"In this paper, we consider a MIMO Free-Space Optical (FSO) communication system over gamma-gamma turbulence channels and derive a closed-form analytical expression for the outage probability taking into account the effects of both the inner scale size of optical channel and the aperture averaging. Our results demonstrate that by increasing the number of transmit and/or receive apertures, the degrading effect of the inner scale size is effectively reduced by extracting the spatial diversity gain of the MIMO scheme. We further provide Monte Carlo simulation results to confirm the validity of the derived expression.","PeriodicalId":57196,"journal":{"name":"光通信研究","volume":"41 1","pages":"275-280"},"PeriodicalIF":0.0,"publicationDate":"2013-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84795096","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 : 2013-07-01DOI: 10.1109/NOC-OCI.2013.6582900
It Ee Lee, Zabih Ghassemlooy, Wai Pang Ng, M. Khalighi, M. Uysal
In this paper, we investigate the joint effects of beam width and the spatial coherence length in a partially coherent free-space optical (FSO) link from the information theory perspective, taking into account the combined influence of atmospheric turbulence and pointing errors. In addition, the effects of aperture-averaging on the average capacity of FSO links employing partially coherent beams (PCBs) are examined. Results show that PCBs are desirable in the weak-to-moderate turbulence regime, whereas highly coherent laser sources are preferred under strong fluctuations conditions; and there exist optimality in the optical beam parameters for different atmospheric channel conditions. Near-optimal average capacity is best achieved through the introduction of a larger receiver aperture and the joint beam width and spatial coherence length optimization technique, which effectively mitigates the effects of scintillation and pointing errors.
{"title":"Capacity analysis of free space optical links for a partially coherent Gaussian beam over a turbulent channel with pointing errors","authors":"It Ee Lee, Zabih Ghassemlooy, Wai Pang Ng, M. Khalighi, M. Uysal","doi":"10.1109/NOC-OCI.2013.6582900","DOIUrl":"https://doi.org/10.1109/NOC-OCI.2013.6582900","url":null,"abstract":"In this paper, we investigate the joint effects of beam width and the spatial coherence length in a partially coherent free-space optical (FSO) link from the information theory perspective, taking into account the combined influence of atmospheric turbulence and pointing errors. In addition, the effects of aperture-averaging on the average capacity of FSO links employing partially coherent beams (PCBs) are examined. Results show that PCBs are desirable in the weak-to-moderate turbulence regime, whereas highly coherent laser sources are preferred under strong fluctuations conditions; and there exist optimality in the optical beam parameters for different atmospheric channel conditions. Near-optimal average capacity is best achieved through the introduction of a larger receiver aperture and the joint beam width and spatial coherence length optimization technique, which effectively mitigates the effects of scintillation and pointing errors.","PeriodicalId":57196,"journal":{"name":"光通信研究","volume":"7 1","pages":"281-286"},"PeriodicalIF":0.0,"publicationDate":"2013-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75730951","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 : 2007-06-24DOI: 10.1109/COINACOFT.2007.4519127
P. V. Cosmo, A. Mocki, A. Pohl, F. Simões, S. Rossi
A 16-channel optical power equalizer has been fabricated and tested in a WDM link. BER of a 10 Gbps data channel is evaluated for the equalizer located in the middle and at the link end.
{"title":"Performance Evaluation of a 16-Channel Power Equalizer in a WDM Optical Link","authors":"P. V. Cosmo, A. Mocki, A. Pohl, F. Simões, S. Rossi","doi":"10.1109/COINACOFT.2007.4519127","DOIUrl":"https://doi.org/10.1109/COINACOFT.2007.4519127","url":null,"abstract":"A 16-channel optical power equalizer has been fabricated and tested in a WDM link. BER of a 10 Gbps data channel is evaluated for the equalizer located in the middle and at the link end.","PeriodicalId":57196,"journal":{"name":"光通信研究","volume":"48 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2007-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74141906","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 : 2007-06-24DOI: 10.1109/COINACOFT.2007.4519087
K. Oh, Y. Baek, Dong-Hoon Lee, S. Oh, E. Sim, Yoon-Jung Park, Young-Tak Han, P. S. Ho, Jang-Uk Shin, H. Sung
This paper introduces optical devices for G-bit WDM- PON system. We have developed WDM-PON ONU employing the reflective semiconductor optical amplifier(R-SOA) and 16 ch WDM-PON OLT which is fabricated by the hybrid integration technology.
{"title":"Optical Devices for WDM-PONs","authors":"K. Oh, Y. Baek, Dong-Hoon Lee, S. Oh, E. Sim, Yoon-Jung Park, Young-Tak Han, P. S. Ho, Jang-Uk Shin, H. Sung","doi":"10.1109/COINACOFT.2007.4519087","DOIUrl":"https://doi.org/10.1109/COINACOFT.2007.4519087","url":null,"abstract":"This paper introduces optical devices for G-bit WDM- PON system. We have developed WDM-PON ONU employing the reflective semiconductor optical amplifier(R-SOA) and 16 ch WDM-PON OLT which is fabricated by the hybrid integration technology.","PeriodicalId":57196,"journal":{"name":"光通信研究","volume":"23 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2007-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74621111","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 : 2007-06-24DOI: 10.1109/COINACOFT.2007.4519088
G. Marshall, M. Ams, D. Little, N. Jovanovic, A. Fuerbach, P. Dekker, A. Rahmani, J. Dawes, J. Piper, M. Withford
Ultrafast laser direct write micro-fabrication has emerged as a significant enabling technology creating new opportunities in microphotonics. The talk will present recent results of the performance of laser written microphotonic componentry in bulk glasses.
{"title":"Direct writing of planar lightwave devices using ultrafast lasers","authors":"G. Marshall, M. Ams, D. Little, N. Jovanovic, A. Fuerbach, P. Dekker, A. Rahmani, J. Dawes, J. Piper, M. Withford","doi":"10.1109/COINACOFT.2007.4519088","DOIUrl":"https://doi.org/10.1109/COINACOFT.2007.4519088","url":null,"abstract":"Ultrafast laser direct write micro-fabrication has emerged as a significant enabling technology creating new opportunities in microphotonics. The talk will present recent results of the performance of laser written microphotonic componentry in bulk glasses.","PeriodicalId":57196,"journal":{"name":"光通信研究","volume":"31 17","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2007-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/COINACOFT.2007.4519088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72470879","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 : 2007-06-24DOI: 10.1109/COINACOFT.2007.4519086
K. Kitayama, Xu Wang, N. Wada
With current mature optical device technology, OCDMA now deserves revisit. In this talk, recent progress of OCDMA using ultra-long code, super-structured fiber Bragg grating en/decoder and optical thesholder for new-generation (NwGN) FTTH system will be presented.
{"title":"OCDMA: A practical Solution Path to New-Generation Symmetric-Bandwidth Access System","authors":"K. Kitayama, Xu Wang, N. Wada","doi":"10.1109/COINACOFT.2007.4519086","DOIUrl":"https://doi.org/10.1109/COINACOFT.2007.4519086","url":null,"abstract":"With current mature optical device technology, OCDMA now deserves revisit. In this talk, recent progress of OCDMA using ultra-long code, super-structured fiber Bragg grating en/decoder and optical thesholder for new-generation (NwGN) FTTH system will be presented.","PeriodicalId":57196,"journal":{"name":"光通信研究","volume":"33 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2007-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79745591","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 : 2007-06-24DOI: 10.1109/COINACOFT.2007.4519117
Ki-Man Choi, Changhee Lee
An efficient evolution method from a TDM-PON to a next-generation PON is proposed and demonstrated. A single-type three-port wavelength band combiner/splitter enables an efficient evolution of TDM-PON maintaining the current PON infrastructure and wavelength plan.
{"title":"An Efficient Evolution Method of Current TDM-PON for Next-Generation Access","authors":"Ki-Man Choi, Changhee Lee","doi":"10.1109/COINACOFT.2007.4519117","DOIUrl":"https://doi.org/10.1109/COINACOFT.2007.4519117","url":null,"abstract":"An efficient evolution method from a TDM-PON to a next-generation PON is proposed and demonstrated. A single-type three-port wavelength band combiner/splitter enables an efficient evolution of TDM-PON maintaining the current PON infrastructure and wavelength plan.","PeriodicalId":57196,"journal":{"name":"光通信研究","volume":"23 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2007-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79247484","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 : 2007-06-24DOI: 10.1109/COINACOFT.2007.4519186
N. Groothoff, C. Martelli, J. Canning
Two separate transverse lasing modes are found when pump power is selectively launched into a DFB photonic crystal fibre laser. The second mode has greater interaction with the air-silica structure.
{"title":"DFB Photonic Crystal Fibre Laser with Selectable Single or Dual Mode Lasing","authors":"N. Groothoff, C. Martelli, J. Canning","doi":"10.1109/COINACOFT.2007.4519186","DOIUrl":"https://doi.org/10.1109/COINACOFT.2007.4519186","url":null,"abstract":"Two separate transverse lasing modes are found when pump power is selectively launched into a DFB photonic crystal fibre laser. The second mode has greater interaction with the air-silica structure.","PeriodicalId":57196,"journal":{"name":"光通信研究","volume":"62 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2007-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84049273","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}
We report the fabrication of small core high-NA soft glass microstructured optical fibre with propagation loss as low as 0.6 dB/m. It is demonstrated that preform extrusion does not significantly contribute to the fibre loss.
{"title":"Reduced loss in extruded soft glass microstructured fibre","authors":"H. Ebendorff‐Heidepriem, Yahua Li, T. Monro","doi":"10.1049/EL:20072562","DOIUrl":"https://doi.org/10.1049/EL:20072562","url":null,"abstract":"We report the fabrication of small core high-NA soft glass microstructured optical fibre with propagation loss as low as 0.6 dB/m. It is demonstrated that preform extrusion does not significantly contribute to the fibre loss.","PeriodicalId":57196,"journal":{"name":"光通信研究","volume":"25 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2007-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78283768","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 : 2007-06-24DOI: 10.1109/COINACOFT.2007.4519099
D. Yeom, P. Steinvurzel, B. Eggleton, S. Do Lim, B. Y. Kim
We demonstrate electrically tunable long-period grating in fluid-filled solid-core photonic bandgap fiber (PBGF) using acoustic waves. We show that highly dispersive nature of PBGF modes results in very narrow-band rejection in spectrum.
{"title":"Tunable long-period grating in solid-core bandgap fiber using acoustic waves","authors":"D. Yeom, P. Steinvurzel, B. Eggleton, S. Do Lim, B. Y. Kim","doi":"10.1109/COINACOFT.2007.4519099","DOIUrl":"https://doi.org/10.1109/COINACOFT.2007.4519099","url":null,"abstract":"We demonstrate electrically tunable long-period grating in fluid-filled solid-core photonic bandgap fiber (PBGF) using acoustic waves. We show that highly dispersive nature of PBGF modes results in very narrow-band rejection in spectrum.","PeriodicalId":57196,"journal":{"name":"光通信研究","volume":"2 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2007-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73159300","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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