Pub Date : 2004-05-04DOI: 10.1109/PAIA.2004.1353824
S.A. Ibrahim, K. Hussein
Frequency chirp in LiNbO/sub 3/ electrooptic modulators is assessed and numerically evaluated using the FDTD method. Affecting parameters and suggested configurations are highlighted and finally, its influence is illustrated by propagating frequency chirped pulses in a dispersive fiber.
{"title":"Frequency chirping in LiNbO/sub 3/ electrooptic modulator","authors":"S.A. Ibrahim, K. Hussein","doi":"10.1109/PAIA.2004.1353824","DOIUrl":"https://doi.org/10.1109/PAIA.2004.1353824","url":null,"abstract":"Frequency chirp in LiNbO/sub 3/ electrooptic modulators is assessed and numerically evaluated using the FDTD method. Affecting parameters and suggested configurations are highlighted and finally, its influence is illustrated by propagating frequency chirped pulses in a dispersive fiber.","PeriodicalId":403020,"journal":{"name":"The Fourth Workshop on Photonics and Its Application, 2004.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126133826","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 : 2004-05-04DOI: 10.1109/PAIA.2004.1353817
D. Khalil
Recent progress in the development of the optical micro-electro-mechanical systems (MEMS) is reviewed with emphasis on their applications in the field of telecommunications. Both the scientific and the industrial aspects of the components are considered. Different structures are reported and, when necessary, briefly explained showing the main difficulties in development as well as state of the art performance. The possibility of industrialization has gained special interest in our discussion.
{"title":"Recent trends in optical MEMS for telecommunication applications","authors":"D. Khalil","doi":"10.1109/PAIA.2004.1353817","DOIUrl":"https://doi.org/10.1109/PAIA.2004.1353817","url":null,"abstract":"Recent progress in the development of the optical micro-electro-mechanical systems (MEMS) is reviewed with emphasis on their applications in the field of telecommunications. Both the scientific and the industrial aspects of the components are considered. Different structures are reported and, when necessary, briefly explained showing the main difficulties in development as well as state of the art performance. The possibility of industrialization has gained special interest in our discussion.","PeriodicalId":403020,"journal":{"name":"The Fourth Workshop on Photonics and Its Application, 2004.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134242360","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 : 2004-05-04DOI: 10.1109/PAIA.2004.1353819
K. Madkour, H. Maaty, D. Khalil
In this work we present a new structure based on the use of hollow dielectric waveguides as the guiding medium between the switch nodes (mirrors) for the N/spl times/N optical cross connect switch. The hollow waveguides are designed and fabricated by deep reactive ion etching (DRIE) on SOI wafers. The optical performance, measured at the 1550 nm shows propagation loss lower than 0.08dB/mm, a polarization dependant loss PDL less than 0.15 dB and a wavelength dependant loss WDL less than 0.152 dB.
{"title":"Hollow waveguides for N/spl times/N optical cross connect switch","authors":"K. Madkour, H. Maaty, D. Khalil","doi":"10.1109/PAIA.2004.1353819","DOIUrl":"https://doi.org/10.1109/PAIA.2004.1353819","url":null,"abstract":"In this work we present a new structure based on the use of hollow dielectric waveguides as the guiding medium between the switch nodes (mirrors) for the N/spl times/N optical cross connect switch. The hollow waveguides are designed and fabricated by deep reactive ion etching (DRIE) on SOI wafers. The optical performance, measured at the 1550 nm shows propagation loss lower than 0.08dB/mm, a polarization dependant loss PDL less than 0.15 dB and a wavelength dependant loss WDL less than 0.152 dB.","PeriodicalId":403020,"journal":{"name":"The Fourth Workshop on Photonics and Its Application, 2004.","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128096556","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 : 2004-05-04DOI: 10.1109/PAIA.2004.1353812
Handy Kelash, H.S. Soror, N.F. El-Halafawy
In the present paper, we have investigated the performance of high-speed optical computing devices based on vertical-cavity-surface emitting laser (VCSEL) diodes made of GaAs with and without feedback. The characteristics of performance are the normalized transfer function of harmonic response, the gain overshoot, the resonance frequency, and the 3-dB bandwidth. The effect of the feedback regulator is deeply studied. Thermal physical parameters are considered in deep sense. The investigation is carried out through dimensionless and normalized analysis.
{"title":"High-speed optical computing devices based on VCSEL diodes with feedback","authors":"Handy Kelash, H.S. Soror, N.F. El-Halafawy","doi":"10.1109/PAIA.2004.1353812","DOIUrl":"https://doi.org/10.1109/PAIA.2004.1353812","url":null,"abstract":"In the present paper, we have investigated the performance of high-speed optical computing devices based on vertical-cavity-surface emitting laser (VCSEL) diodes made of GaAs with and without feedback. The characteristics of performance are the normalized transfer function of harmonic response, the gain overshoot, the resonance frequency, and the 3-dB bandwidth. The effect of the feedback regulator is deeply studied. Thermal physical parameters are considered in deep sense. The investigation is carried out through dimensionless and normalized analysis.","PeriodicalId":403020,"journal":{"name":"The Fourth Workshop on Photonics and Its Application, 2004.","volume":"350 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120929531","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 : 2004-05-04DOI: 10.1109/PAIA.2004.1353814
H. Shalaby
Two-random-access protocols for optical direct-detection code-division multiple access packet networks are proposed. Both system throughput and average packet delay are derived and investigated for two famous receiver models, namely the correlation and chip-level receivers. Our results reveal that the proposed protocols yield competitive system through-put is achieved when using chip-level receivers along with the second protocol. Further, a mathematical description of connection establishment/release of the second protocol is presented using a detailed state diagram. The steady-state system throughput for this state diagram is then derived using a simplified technique. The effect of several design parameters on the above performance measure has been examined with the aid of a set of numerical examples. In our numerical calculations chip-level models have been adopted at the receiver side.
{"title":"Optical CDMA protocols: upper layers analysis","authors":"H. Shalaby","doi":"10.1109/PAIA.2004.1353814","DOIUrl":"https://doi.org/10.1109/PAIA.2004.1353814","url":null,"abstract":"Two-random-access protocols for optical direct-detection code-division multiple access packet networks are proposed. Both system throughput and average packet delay are derived and investigated for two famous receiver models, namely the correlation and chip-level receivers. Our results reveal that the proposed protocols yield competitive system through-put is achieved when using chip-level receivers along with the second protocol. Further, a mathematical description of connection establishment/release of the second protocol is presented using a detailed state diagram. The steady-state system throughput for this state diagram is then derived using a simplified technique. The effect of several design parameters on the above performance measure has been examined with the aid of a set of numerical examples. In our numerical calculations chip-level models have been adopted at the receiver side.","PeriodicalId":403020,"journal":{"name":"The Fourth Workshop on Photonics and Its Application, 2004.","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114694490","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 : 2004-05-04DOI: 10.1109/PAIA.2004.1353810
A. El-Sherbini, A. Mohamed, F. El-Halafawy, A. Sharaf
In the present paper, two ultra-wide multiplexing techniques are processed in high-speed optical communication cables for the ultimate bit rate repeater spacing product, namely ultra-wide wavelength division multiplexing (UWWDM) and ultra-wide space-division multiplexing (UWSDM). A parametric "Raman" amplifier is employed plus erbium-doped fiber amplifier (EDFA). Four advanced transmission methods are investigated namely modified "Shannon" capacity, soliton propagation, maximum time division multiplexing (MTDM) and nonlinear chirping propagation with squeezed dispersion in single mode-binary glass fiber. 4000 channels are (UWWDM) processed in core up to 150 links (UWSDM).
{"title":"Ultra-wide multiplexing (WDM+SDM) techniques in high-speed optical communication cables","authors":"A. El-Sherbini, A. Mohamed, F. El-Halafawy, A. Sharaf","doi":"10.1109/PAIA.2004.1353810","DOIUrl":"https://doi.org/10.1109/PAIA.2004.1353810","url":null,"abstract":"In the present paper, two ultra-wide multiplexing techniques are processed in high-speed optical communication cables for the ultimate bit rate repeater spacing product, namely ultra-wide wavelength division multiplexing (UWWDM) and ultra-wide space-division multiplexing (UWSDM). A parametric \"Raman\" amplifier is employed plus erbium-doped fiber amplifier (EDFA). Four advanced transmission methods are investigated namely modified \"Shannon\" capacity, soliton propagation, maximum time division multiplexing (MTDM) and nonlinear chirping propagation with squeezed dispersion in single mode-binary glass fiber. 4000 channels are (UWWDM) processed in core up to 150 links (UWSDM).","PeriodicalId":403020,"journal":{"name":"The Fourth Workshop on Photonics and Its Application, 2004.","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133614769","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 : 2004-05-04DOI: 10.1109/PAIA.2004.1353821
Farouk E. El-Khamy, Hossam M. H. Shalaby, Mohamed E. Nasr, Hussein T. Mouftah
Current developments in optical components technologies enable wavelengths to be very narrowly spaced, transforming the optical fiber into a multi-terabit capacity medium. A new generation of "all-optical" cross-connects started to appear in the market leading to a number of advantages such as increased switching capacity, decreased overall network costs, scalability and transparency resulting in the capability to support any protocol. An additional advantage is the ability to configure the switching fabric and the wavelength converters in real-time. All-optical switches are made possible by a number of technologies that allow the managing and switching photonic signals without converting them into electronic signals. Only a couple of technologies appear ready to make the transition form the laboratory to the network, where they must support the basic feature set of a carrier-grade, scalable optical switches. Arguably, the leading technology for developing an economically viable, scalable all-optical , OOO switch is the 3D micro-electromechanical system (MEMS). 3D MEMS uses control mechanisms to tilt mirrors in multiple directions (3 dimensional). For the control of optical cross-connects, the MP Lambdas approach was proposed by IETF, according to which the MPLS traffic engineering control plane is used in optical cross connects. In this paper, evolution of architectures for optical cross-connects all optical switch are discussed with different switch fabrics such as micro-electro-mechanical all optical switch fabric and arrayed-wavelength-grating routers (AWGRs). The paper includes also an illustration of the major function of the multi protocol label switching MPLS optical router and the use of MP lambda switch to control the all optical switch.
{"title":"Optical-label-based all-optical packet switching routers","authors":"Farouk E. El-Khamy, Hossam M. H. Shalaby, Mohamed E. Nasr, Hussein T. Mouftah","doi":"10.1109/PAIA.2004.1353821","DOIUrl":"https://doi.org/10.1109/PAIA.2004.1353821","url":null,"abstract":"Current developments in optical components technologies enable wavelengths to be very narrowly spaced, transforming the optical fiber into a multi-terabit capacity medium. A new generation of \"all-optical\" cross-connects started to appear in the market leading to a number of advantages such as increased switching capacity, decreased overall network costs, scalability and transparency resulting in the capability to support any protocol. An additional advantage is the ability to configure the switching fabric and the wavelength converters in real-time. All-optical switches are made possible by a number of technologies that allow the managing and switching photonic signals without converting them into electronic signals. Only a couple of technologies appear ready to make the transition form the laboratory to the network, where they must support the basic feature set of a carrier-grade, scalable optical switches. Arguably, the leading technology for developing an economically viable, scalable all-optical , OOO switch is the 3D micro-electromechanical system (MEMS). 3D MEMS uses control mechanisms to tilt mirrors in multiple directions (3 dimensional). For the control of optical cross-connects, the MP Lambdas approach was proposed by IETF, according to which the MPLS traffic engineering control plane is used in optical cross connects. In this paper, evolution of architectures for optical cross-connects all optical switch are discussed with different switch fabrics such as micro-electro-mechanical all optical switch fabric and arrayed-wavelength-grating routers (AWGRs). The paper includes also an illustration of the major function of the multi protocol label switching MPLS optical router and the use of MP lambda switch to control the all optical switch.","PeriodicalId":403020,"journal":{"name":"The Fourth Workshop on Photonics and Its Application, 2004.","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122380879","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 : 2004-05-04DOI: 10.1109/PAIA.2004.1353808
M. Hadhoud, F. A. Abd El-Samie, S. El-Khamy
This paper presents a survey on existing as well as new trends in the field of high resolution (HR) image processing. The paper focuses on the main topics, image registration, image interpolation and image super-resolution reconstruction. The problem is defined, current techniques are presented. For example, in image interpolation, polynomial based image interpolation is reviewed, some new techniques for adaptive image interpolation and inverse image interpolation are presented. Other topics are treated in the same manner. Important applications for the HR image reconstruction are presented. Further insight on some problems in the field of SR are presented. The aim of the paper is to motivate further research in this area of image processing.
{"title":"New trends in high resolution image processing","authors":"M. Hadhoud, F. A. Abd El-Samie, S. El-Khamy","doi":"10.1109/PAIA.2004.1353808","DOIUrl":"https://doi.org/10.1109/PAIA.2004.1353808","url":null,"abstract":"This paper presents a survey on existing as well as new trends in the field of high resolution (HR) image processing. The paper focuses on the main topics, image registration, image interpolation and image super-resolution reconstruction. The problem is defined, current techniques are presented. For example, in image interpolation, polynomial based image interpolation is reviewed, some new techniques for adaptive image interpolation and inverse image interpolation are presented. Other topics are treated in the same manner. Important applications for the HR image reconstruction are presented. Further insight on some problems in the field of SR are presented. The aim of the paper is to motivate further research in this area of image processing.","PeriodicalId":403020,"journal":{"name":"The Fourth Workshop on Photonics and Its Application, 2004.","volume":"244 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123013252","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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