Pub Date : 2007-07-01DOI: 10.1109/ICTON.2007.4296298
T. Berceli, E. Udvary
The wireless indoor communication system applying an optical transparent backbone provides an economic and flexible approach for local area networks in office buildings. The performance of the system is enhanced by assigning specific subcarriers for the individual picocells which enables the transmission of the wireless channels without altering their modulation format. This method allows for a simple, and low-cost communication system. Cascadability is critically important, because several electrical subcarriers are transmitted on the same optical signal. It is shown by numerical simulation and measurement that SOA modulator provides acceptable nonlinear distortion for SubCarrier multiplexed telecommunication systems. It demand more advanced amplifier-modulator working state planning. The temperature and the optical reflection have also important role in linearity.
{"title":"Indoor Communications Applying an Optical Backbone","authors":"T. Berceli, E. Udvary","doi":"10.1109/ICTON.2007.4296298","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296298","url":null,"abstract":"The wireless indoor communication system applying an optical transparent backbone provides an economic and flexible approach for local area networks in office buildings. The performance of the system is enhanced by assigning specific subcarriers for the individual picocells which enables the transmission of the wireless channels without altering their modulation format. This method allows for a simple, and low-cost communication system. Cascadability is critically important, because several electrical subcarriers are transmitted on the same optical signal. It is shown by numerical simulation and measurement that SOA modulator provides acceptable nonlinear distortion for SubCarrier multiplexed telecommunication systems. It demand more advanced amplifier-modulator working state planning. The temperature and the optical reflection have also important role in linearity.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130705258","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296169
T. Birks, A. Witkowska, S. Leon-Saval, K. Lai, W. Wadsworth
We have used tapering of photonic crystal fibres to make all-fibre mode converters for the LP11 and LP02 modes. The devices rely on adiabatic propagation rather than resonant coupling, allowing high extinction across a wide wavelength range.
{"title":"Broadband Mode Convertors in Photonic Crystal Fibres","authors":"T. Birks, A. Witkowska, S. Leon-Saval, K. Lai, W. Wadsworth","doi":"10.1109/ICTON.2007.4296169","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296169","url":null,"abstract":"We have used tapering of photonic crystal fibres to make all-fibre mode converters for the LP11 and LP02 modes. The devices rely on adiabatic propagation rather than resonant coupling, allowing high extinction across a wide wavelength range.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130903150","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296384
A. Waz, P. Kaczmarek, K. Abramski
The paper describes our measurement of scattered light for multipoint laser-fiber vibrometry. We use the coherent radiation in the 1550 nm range and we adopted WDM technique for multiwavelength operation. It allows to apply 3-point measurements of vibrating object to establish 3D vibration. This paper describes three fiber-free space configurations in order to establish the best detection conditions.
{"title":"Detection of Scattered Light in Fiber - Free Space - Object Configurations","authors":"A. Waz, P. Kaczmarek, K. Abramski","doi":"10.1109/ICTON.2007.4296384","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296384","url":null,"abstract":"The paper describes our measurement of scattered light for multipoint laser-fiber vibrometry. We use the coherent radiation in the 1550 nm range and we adopted WDM technique for multiwavelength operation. It allows to apply 3-point measurements of vibrating object to establish 3D vibration. This paper describes three fiber-free space configurations in order to establish the best detection conditions.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"433 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130417255","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296025
A. Girard, D. Kallgren
This paper describes and analyzes the major technical hurdles that the deployment of 40G line rate transport systems faces in fiber optic telecommunications. A case study is used to study the network readiness for transmission at 40G. Experimental data are used together with a standardized model for verifying if the link is ready to transport 40G. Recommendations are provided following the conclusion of the analysis.
{"title":"40G and Higher, What is Waiting for Us Ahead?","authors":"A. Girard, D. Kallgren","doi":"10.1109/ICTON.2007.4296025","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296025","url":null,"abstract":"This paper describes and analyzes the major technical hurdles that the deployment of 40G line rate transport systems faces in fiber optic telecommunications. A case study is used to study the network readiness for transmission at 40G. Experimental data are used together with a standardized model for verifying if the link is ready to transport 40G. Recommendations are provided following the conclusion of the analysis.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131079136","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296133
K. Asakawa
Recent development of a symmetric Mach-Zehnder type, ultra-small and ultra-fast all-optical switch (PC-SMZ) composed of GaAs-based two-dimensional photonic crystal (2DPC) waveguides and InAs-quantum dots (QDs) has resulted in a new proposal of a PC-based optical flip-flop switch (PC-FF). Nano-photonic technologies involving state-of-the-art PC-SMZ and new problems for the PC-FF are reviewed.
{"title":"PC-SMZ-Based All-Optical Flip-Flop Switch : PC-FF","authors":"K. Asakawa","doi":"10.1109/ICTON.2007.4296133","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296133","url":null,"abstract":"Recent development of a symmetric Mach-Zehnder type, ultra-small and ultra-fast all-optical switch (PC-SMZ) composed of GaAs-based two-dimensional photonic crystal (2DPC) waveguides and InAs-quantum dots (QDs) has resulted in a new proposal of a PC-based optical flip-flop switch (PC-FF). Nano-photonic technologies involving state-of-the-art PC-SMZ and new problems for the PC-FF are reviewed.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129726971","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296143
M. Bergmair, K. Hingerl
In the last two decades photonic crystals (PC) have been studied in one, two and three dimensions. Recently metallic two and three dimensional PCs were investigated with the focus on using such structures in incandescent lightning and thermal photovoltaic applications. These structures exhibit a metallic band gap below a certain threshold frequency as well as structural band gaps. The PC can be designed that the metallic band gap allows to block the infrared transmission respectively emission. We will show that also simple one dimensional systems have the same features in case one component has a large absorbing part in its dielectric function. In this frequency region an omni-directional absorption band gap will occur. We demonstrate this effect by studying a metallic and polaritonic photonic crystal. In the last part of this article we show the dispersion relation of surface plasmons and polaritons by studying grazing incidence parallel to the layers. These surface states extend over adjacent layers and exhibit a region of negative group velocity for a polaritonic photonic crystal.
{"title":"Band Structure and Coupled Surface Plasmons in One Dimensional, Frequency Dependent Photonic Crystals","authors":"M. Bergmair, K. Hingerl","doi":"10.1109/ICTON.2007.4296143","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296143","url":null,"abstract":"In the last two decades photonic crystals (PC) have been studied in one, two and three dimensions. Recently metallic two and three dimensional PCs were investigated with the focus on using such structures in incandescent lightning and thermal photovoltaic applications. These structures exhibit a metallic band gap below a certain threshold frequency as well as structural band gaps. The PC can be designed that the metallic band gap allows to block the infrared transmission respectively emission. We will show that also simple one dimensional systems have the same features in case one component has a large absorbing part in its dielectric function. In this frequency region an omni-directional absorption band gap will occur. We demonstrate this effect by studying a metallic and polaritonic photonic crystal. In the last part of this article we show the dispersion relation of surface plasmons and polaritons by studying grazing incidence parallel to the layers. These surface states extend over adjacent layers and exhibit a region of negative group velocity for a polaritonic photonic crystal.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128738891","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296136
T. Czyszanowski, R. Sarzała, M. Dems, H. Thienpont, K. Panajotov
Photonic-crystal (PhC) structures can provide efficient confinement for Vertical-Cavity Surface-Emitting Lasers (VCSELs). PhC is especially appropriate for VCSELs based on phosphide or nitride materials, which suffer from the lack of efficient optical confinement by oxide apertures. We present an overview of our optimization work on telecommunication-oriented PhC - VCSELs, which has been carried out on the base of three- dimensional, full vectorial Plane Wave Admittance Method combined with thermal, electrical and gain solver. We perform an exhaustive analysis of a broad range of the photonic-crystal parameters such as hole etching depth, distance between the holes and their diameters looking for the largest modal gain as well as the most efficient mode discrimination. As a result we determine the optimal VCSEL structure assuring high beam quality. Furthermore, the optimization of current injection is performed assuring reduction of threshold current and/or single mode operation.
{"title":"Optimal Designs of Telecommunications Oriented Photonic-Crystal VCSELs","authors":"T. Czyszanowski, R. Sarzała, M. Dems, H. Thienpont, K. Panajotov","doi":"10.1109/ICTON.2007.4296136","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296136","url":null,"abstract":"Photonic-crystal (PhC) structures can provide efficient confinement for Vertical-Cavity Surface-Emitting Lasers (VCSELs). PhC is especially appropriate for VCSELs based on phosphide or nitride materials, which suffer from the lack of efficient optical confinement by oxide apertures. We present an overview of our optimization work on telecommunication-oriented PhC - VCSELs, which has been carried out on the base of three- dimensional, full vectorial Plane Wave Admittance Method combined with thermal, electrical and gain solver. We perform an exhaustive analysis of a broad range of the photonic-crystal parameters such as hole etching depth, distance between the holes and their diameters looking for the largest modal gain as well as the most efficient mode discrimination. As a result we determine the optimal VCSEL structure assuring high beam quality. Furthermore, the optimization of current injection is performed assuring reduction of threshold current and/or single mode operation.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"204 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124570575","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296308
Huhnkuk Lim, Jubeom Kim, C. Oh
In the optical packet switch (OPS) with the hybrid buffer for contention resolution of asynchronous and variable length packets, the optimum numbers of tunable wavelength converters (TWCs) and internal wavelengths is, for the first time, presented for reducing switch cost. The hybrid buffer was addressed, to reduce packet loss further as one of the alternative buffer structures for contention resolution of asynchronous and variable length packets, which consists of the FDL buffer and the electronic buffer. To optimize TWCs and internal wavelengths related to design cost of the OPS with the hybrid buffer, we proposed a scheduling algorithm for the hybrid buffer with the limited TWCs and internal wavelengths. For the fully shared TWC structure, the optimum numbers of TWCs and internal wavelengths to guarantee minimum packet loss are evaluated to prevent resource waste under the hybrid buffer. Under a given load, TWCs and internal wavelengths could be significantly reduced, guaranteeing the same packet loss as the performance of the hybrid buffer structured OPS with more number of TWCs and internal wavelengths.
{"title":"Hybrid Buffer Structured Optical Packet Switch with the Optimum Numbers of Tunable Wavelength Converters and Internal Wavelengths","authors":"Huhnkuk Lim, Jubeom Kim, C. Oh","doi":"10.1109/ICTON.2007.4296308","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296308","url":null,"abstract":"In the optical packet switch (OPS) with the hybrid buffer for contention resolution of asynchronous and variable length packets, the optimum numbers of tunable wavelength converters (TWCs) and internal wavelengths is, for the first time, presented for reducing switch cost. The hybrid buffer was addressed, to reduce packet loss further as one of the alternative buffer structures for contention resolution of asynchronous and variable length packets, which consists of the FDL buffer and the electronic buffer. To optimize TWCs and internal wavelengths related to design cost of the OPS with the hybrid buffer, we proposed a scheduling algorithm for the hybrid buffer with the limited TWCs and internal wavelengths. For the fully shared TWC structure, the optimum numbers of TWCs and internal wavelengths to guarantee minimum packet loss are evaluated to prevent resource waste under the hybrid buffer. Under a given load, TWCs and internal wavelengths could be significantly reduced, guaranteeing the same packet loss as the performance of the hybrid buffer structured OPS with more number of TWCs and internal wavelengths.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127039240","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296198
J. Misiewicz, G. Sȩk, R. Kudrawiec, M. Motyka
We have presented two contactless modes of electromodulation spectroscopy as tools for detailed nondestructive characterization of low dimensional semiconductor device structures. Several examples have been shown for different solutions of the laser structures for applications in 1.3 - 1.55 mum telecommunication range. The ways for determining their fundamental properties which are related then to the device parameters have been discussed.
{"title":"Electromodulation-Absorption Type Spectroscopy of Semiconductor Structures Applied in Telecommunication Lasers","authors":"J. Misiewicz, G. Sȩk, R. Kudrawiec, M. Motyka","doi":"10.1109/ICTON.2007.4296198","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296198","url":null,"abstract":"We have presented two contactless modes of electromodulation spectroscopy as tools for detailed nondestructive characterization of low dimensional semiconductor device structures. Several examples have been shown for different solutions of the laser structures for applications in 1.3 - 1.55 mum telecommunication range. The ways for determining their fundamental properties which are related then to the device parameters have been discussed.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127136594","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296019
W. Rosenkranz, J. Leibrich, M. Serbay, A. Ali
Based on the demand for transmission technologies offering high ratio of bits per symbol, two promising candidates to achieve a data rate of 100 Gb/s per optical carrier are discussed, namely optical orthogonal frequency division multiplexing and 16-ary multilevel modulation.
{"title":"Orthogonal Frequency Division Multiplexing (OFDM) and other Advanced Options to achieve 100Gb/s Ethernet Transmission","authors":"W. Rosenkranz, J. Leibrich, M. Serbay, A. Ali","doi":"10.1109/ICTON.2007.4296019","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296019","url":null,"abstract":"Based on the demand for transmission technologies offering high ratio of bits per symbol, two promising candidates to achieve a data rate of 100 Gb/s per optical carrier are discussed, namely optical orthogonal frequency division multiplexing and 16-ary multilevel modulation.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114239720","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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