Pub Date : 2000-06-05DOI: 10.1109/ICTON.2000.874151
I. Vorgul, M. Marciniak
The engineering of photonic stop-bands and band-gaps is opening up new opportunities in many areas of photonics and optoelectronics. Theoretical modelling as well as experimental research goes in two directions. The first one is analytical, numerical or experimental investigation of reflection and transmission characteristics for special kinds of the structures and by this way an optimization of the structures parameters. The second one is an inverse problem approach using different theoretical and measuring techniques to reconstruct the required geometric and material characteristics, which provide the required optical field transformation.
{"title":"Achievements in PBG structures modelling and fabrication","authors":"I. Vorgul, M. Marciniak","doi":"10.1109/ICTON.2000.874151","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874151","url":null,"abstract":"The engineering of photonic stop-bands and band-gaps is opening up new opportunities in many areas of photonics and optoelectronics. Theoretical modelling as well as experimental research goes in two directions. The first one is analytical, numerical or experimental investigation of reflection and transmission characteristics for special kinds of the structures and by this way an optimization of the structures parameters. The second one is an inverse problem approach using different theoretical and measuring techniques to reconstruct the required geometric and material characteristics, which provide the required optical field transformation.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115674899","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874113
A. Bychenkov, V. Derbov
In contrast to the earlier papers devoted to misaligned beams in circular waveguide media, in the present paper we consider an elliptical gradient waveguide with parabolic transverse profile of linear refraction index and Kerr nonlinearity. In our analysis of the beam dynamics we focus our attention at the features promising for application in mode-locking devices.
{"title":"Modeling of off-axis Gaussian beams in elliptical waveguides: application to mode-locking devices","authors":"A. Bychenkov, V. Derbov","doi":"10.1109/ICTON.2000.874113","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874113","url":null,"abstract":"In contrast to the earlier papers devoted to misaligned beams in circular waveguide media, in the present paper we consider an elliptical gradient waveguide with parabolic transverse profile of linear refraction index and Kerr nonlinearity. In our analysis of the beam dynamics we focus our attention at the features promising for application in mode-locking devices.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124473234","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874148
B. Batagelj
This paper I present the design theory of the FWM wavelength converter using single-mode optical fiber. The conversion efficiency for far off and around zero-dispersion wavelength of a fiber are discussed and compared. The theoretical calculations of the conversion efficiency for both cases are made. The numerical results for wavelength conversion around zero-dispersion wavelength are clearly shown in conversion diagrams. In this paper I also address the optimization of conversion efficiency and bandwidth.
{"title":"Conversion efficiency of fiber wavelength converter based on degenerate FWM","authors":"B. Batagelj","doi":"10.1109/ICTON.2000.874148","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874148","url":null,"abstract":"This paper I present the design theory of the FWM wavelength converter using single-mode optical fiber. The conversion efficiency for far off and around zero-dispersion wavelength of a fiber are discussed and compared. The theoretical calculations of the conversion efficiency for both cases are made. The numerical results for wavelength conversion around zero-dispersion wavelength are clearly shown in conversion diagrams. In this paper I also address the optimization of conversion efficiency and bandwidth.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122965327","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874102
R. Antosik
Summary form only given. Today's DWDM optical line systems (OLS) carry OC48/OC192 SONET/SDH voice and data, fiber-cut and equipment-failure protected by the SONET/SDH rings. Emergence of new transmission protocols such as IP over fiber or gigabit Ethernet requires protocol independent optical protection implemented in the new transmission layer called an optical network. High cost of 1+1 dedicated protection is reduced with the optical shared ring protection (OSPring) where a single protection wavelength protects against simultaneous failures of non-overlapping paths on several service wavelengths. Simultaneous failures of overlapping paths cannot be protected by OSPring. Optical cross connects interconnect DWDM OLS systems to give the ability to restore traffic from the failed OLS by re-routing it through its inter-connected partners. The required 50 milliseconds protection delay is much shorter than the seconds long restoration.
{"title":"Protection and restoration in optical networks","authors":"R. Antosik","doi":"10.1109/ICTON.2000.874102","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874102","url":null,"abstract":"Summary form only given. Today's DWDM optical line systems (OLS) carry OC48/OC192 SONET/SDH voice and data, fiber-cut and equipment-failure protected by the SONET/SDH rings. Emergence of new transmission protocols such as IP over fiber or gigabit Ethernet requires protocol independent optical protection implemented in the new transmission layer called an optical network. High cost of 1+1 dedicated protection is reduced with the optical shared ring protection (OSPring) where a single protection wavelength protects against simultaneous failures of non-overlapping paths on several service wavelengths. Simultaneous failures of overlapping paths cannot be protected by OSPring. Optical cross connects interconnect DWDM OLS systems to give the ability to restore traffic from the failed OLS by re-routing it through its inter-connected partners. The required 50 milliseconds protection delay is much shorter than the seconds long restoration.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129329640","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874127
P. Stepinski, W. Trzeciakowski
Room-temperature emission of 1310 nm InGaAsP-InP laser diode has been studied as a function of hydrostatic pressure in an optical clamp cell up to 20 kbar. The diode was a commercial single-mode device by Siemens. The emission line shifted towards the shorter wavelengths similar to the bandgap of the constituent materials. The tuning range was over 200 nm. Here we consider the possibility of applying the high pressure cell with commercial laser diode inside as a pressure-tuned light source because of its narrow lines, wide tuning range and easy to implement portable equipment. It could be useful for measuring absorption and dispersion in optical transmission lines. Application of different types of electronically tunable lasers in the cell could further extend the tuning range and provide fine tuning and continuous tuning.
{"title":"Pressure tuned laser diode as a light source for characterization of optical transmission lines","authors":"P. Stepinski, W. Trzeciakowski","doi":"10.1109/ICTON.2000.874127","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874127","url":null,"abstract":"Room-temperature emission of 1310 nm InGaAsP-InP laser diode has been studied as a function of hydrostatic pressure in an optical clamp cell up to 20 kbar. The diode was a commercial single-mode device by Siemens. The emission line shifted towards the shorter wavelengths similar to the bandgap of the constituent materials. The tuning range was over 200 nm. Here we consider the possibility of applying the high pressure cell with commercial laser diode inside as a pressure-tuned light source because of its narrow lines, wide tuning range and easy to implement portable equipment. It could be useful for measuring absorption and dispersion in optical transmission lines. Application of different types of electronically tunable lasers in the cell could further extend the tuning range and provide fine tuning and continuous tuning.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130495065","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874121
A. de Rossi, M. Peccianti, G. Assanto, A. De Luca, M.A. Karpiercz, I. Khoo
Spatial solitons are formed by an argon-ion beam in cells containing undoped nematic liquid crystals and subject to an applied voltage. Self-confinement and guidance of a weak He-Ne probe are demonstrated with mW-powers over mm-lengths.
{"title":"Light self-confinement in planar cells containing nematic liquid crystals","authors":"A. de Rossi, M. Peccianti, G. Assanto, A. De Luca, M.A. Karpiercz, I. Khoo","doi":"10.1109/ICTON.2000.874121","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874121","url":null,"abstract":"Spatial solitons are formed by an argon-ion beam in cells containing undoped nematic liquid crystals and subject to an applied voltage. Self-confinement and guidance of a weak He-Ne probe are demonstrated with mW-powers over mm-lengths.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123671799","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874159
Y. Morozov, I. Nefedov, V. Gusyatnkov
The dynamics of vertical cavity surface emitting laser (VCSEL) operation was numerically simulated under the pumping current modulation by pseudorandom pulsed sequence for the NRZ encoding format. It was obtained that, for certain laser parameters and modulation ones, the emitted pulses have substantially differing mode composition due to delay in exciting the side modes with respect to the main mode excitation. We consider this result to be of importance for applications and to be taken into account with the VCSEL's use in modern optical-fibre based telecommunication systems.
{"title":"Mode transformation in VCSEL emitting pseudorandom sequence of pulses","authors":"Y. Morozov, I. Nefedov, V. Gusyatnkov","doi":"10.1109/ICTON.2000.874159","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874159","url":null,"abstract":"The dynamics of vertical cavity surface emitting laser (VCSEL) operation was numerically simulated under the pumping current modulation by pseudorandom pulsed sequence for the NRZ encoding format. It was obtained that, for certain laser parameters and modulation ones, the emitted pulses have substantially differing mode composition due to delay in exciting the side modes with respect to the main mode excitation. We consider this result to be of importance for applications and to be taken into account with the VCSEL's use in modern optical-fibre based telecommunication systems.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130152442","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874146
K. Gaikovich, J. Nozdrin, A. Zhilin
It was discovered that a laser pulse could significantly redistribute sheet currents of the superconductor films in a remanent state without the change of the total number of current vortices in the film. This effect can be used to switch or to change the polarization of the optical signal on the base of the magneto-optics.
{"title":"Optical switch of polarization based on high-T/sub C/ films","authors":"K. Gaikovich, J. Nozdrin, A. Zhilin","doi":"10.1109/ICTON.2000.874146","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874146","url":null,"abstract":"It was discovered that a laser pulse could significantly redistribute sheet currents of the superconductor films in a remanent state without the change of the total number of current vortices in the film. This effect can be used to switch or to change the polarization of the optical signal on the base of the magneto-optics.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132687332","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874103
P. André, A. Pinto, J. Pinto, T. Almeida, M. Pousa
A configurable optical add-drop multiplexer (OADM) based on fibre Bragg gratings is reported. Dynamical selection of the add-drop or pass-through functionality is realised according to the control of an optical switch. OADM performances measurements in a 70 km, 3/spl times/2.5 Gb/s channel WDM network are reported.
{"title":"Selective wavelength transparent optical add-drop multiplexer based on fibre Bragg gratings","authors":"P. André, A. Pinto, J. Pinto, T. Almeida, M. Pousa","doi":"10.1109/ICTON.2000.874103","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874103","url":null,"abstract":"A configurable optical add-drop multiplexer (OADM) based on fibre Bragg gratings is reported. Dynamical selection of the add-drop or pass-through functionality is realised according to the control of an optical switch. OADM performances measurements in a 70 km, 3/spl times/2.5 Gb/s channel WDM network are reported.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123539854","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874160
B. Mroziewicz
Some aspects of diode lasers designed for light-wave systems are surveyed. Among the features pertinent to this application, wavelength tuning deserves special consideration and is discussed more in detail. Numerous advantages of VCSELs over edge emitting lasers make them competitive and very attractive. State of the art designs of these lasers with attention focused on long wavelength devices are described. Quantum dots structures open now new prospects to laser technology. Recent research results on these structures are presented to summarise developments in the field.
{"title":"Diode lasers for light-wave systems","authors":"B. Mroziewicz","doi":"10.1109/ICTON.2000.874160","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874160","url":null,"abstract":"Some aspects of diode lasers designed for light-wave systems are surveyed. Among the features pertinent to this application, wavelength tuning deserves special consideration and is discussed more in detail. Numerous advantages of VCSELs over edge emitting lasers make them competitive and very attractive. State of the art designs of these lasers with attention focused on long wavelength devices are described. Quantum dots structures open now new prospects to laser technology. Recent research results on these structures are presented to summarise developments in the field.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127168796","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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