Pub Date : 2008-06-22DOI: 10.1109/ICTON.2008.4598783
Z. Gaburro
We demonstrate steady state pulsed pumping of a lithium niobate whispering gallery disk resonator. Coherent excitation is achieved by matching the repetition rate of a pumping mode-locked laser to a sub multiple of the free spectral range of one of the sets of modes of the disk. Once the disk is excited, we measure the resonatorpsilas quality factor by the fractional loss per round trip, and, after blocking the excitation, by the pulsed ringdown time decay. Both values agree with the quality factor measured by continuous wave transmission.
{"title":"Pulsed excitation of a whispering gallery resonator","authors":"Z. Gaburro","doi":"10.1109/ICTON.2008.4598783","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598783","url":null,"abstract":"We demonstrate steady state pulsed pumping of a lithium niobate whispering gallery disk resonator. Coherent excitation is achieved by matching the repetition rate of a pumping mode-locked laser to a sub multiple of the free spectral range of one of the sets of modes of the disk. Once the disk is excited, we measure the resonatorpsilas quality factor by the fractional loss per round trip, and, after blocking the excitation, by the pulsed ringdown time decay. Both values agree with the quality factor measured by continuous wave transmission.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132507341","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598814
Jen-Fa Huang, Hsu-Chih Cheng, Chien-Wen Chang
The frequency-domain optical coherence tomography (FD-OCT) has the advantages of high acquisition time and high system sensitivity, it makes to obtain cross-section image based on the broadband source or swept source. The phase shifting algorithm always applies to reduce the additional noise within FD-OCT and provide accurate signal process. In this paper, we present a new system structure of group delay based phase shifting by combining diffraction grating pairs in frequency domain OCT. For the parallel grating pairpsilas property, we separate the spectrum and stretch the optical pulse in time to produce group delay result utilizing diffraction grating pair. It makes the linearly group delay between the different frequencies and provides accurate phase shifting algorithm, promotes the system performance and accuracy.
{"title":"Group delay based phase shifting algorithm on frequency domain optical coherence tomography","authors":"Jen-Fa Huang, Hsu-Chih Cheng, Chien-Wen Chang","doi":"10.1109/ICTON.2008.4598814","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598814","url":null,"abstract":"The frequency-domain optical coherence tomography (FD-OCT) has the advantages of high acquisition time and high system sensitivity, it makes to obtain cross-section image based on the broadband source or swept source. The phase shifting algorithm always applies to reduce the additional noise within FD-OCT and provide accurate signal process. In this paper, we present a new system structure of group delay based phase shifting by combining diffraction grating pairs in frequency domain OCT. For the parallel grating pairpsilas property, we separate the spectrum and stretch the optical pulse in time to produce group delay result utilizing diffraction grating pair. It makes the linearly group delay between the different frequencies and provides accurate phase shifting algorithm, promotes the system performance and accuracy.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133340026","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598585
L. Vegni, F. Bilotti
In this contribution, we propose the design of innovative microwave components based on metamaterials, such as patch and leaky wave radiators, absorbers, and directional couplers. The employment of metamaterials aims to overcome the intrinsic limitations of the standard components, based on the diffraction limit. In this way, patch antennas can be miniaturized compared to their traditional counterparts, leaky wave radiators can achieve improved directivity performances, resonant microwave absorbers can be miniaturized beyond 1/100 of the operating wavelength in terms of thickness, microstrip directional couplers can be made very short and with very high coupling values. The physical mechanisms behind the operation of such components, the analysis and design steps, and the experiments conducted in cooperation with other universities will be presented. Part of this work has been performed in the frame of the Network of Excellence Metamorphose and in the national project PRIN 2006 leaded by Roma Tre.
{"title":"Design of innovative metamaterial microwave components","authors":"L. Vegni, F. Bilotti","doi":"10.1109/ICTON.2008.4598585","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598585","url":null,"abstract":"In this contribution, we propose the design of innovative microwave components based on metamaterials, such as patch and leaky wave radiators, absorbers, and directional couplers. The employment of metamaterials aims to overcome the intrinsic limitations of the standard components, based on the diffraction limit. In this way, patch antennas can be miniaturized compared to their traditional counterparts, leaky wave radiators can achieve improved directivity performances, resonant microwave absorbers can be miniaturized beyond 1/100 of the operating wavelength in terms of thickness, microstrip directional couplers can be made very short and with very high coupling values. The physical mechanisms behind the operation of such components, the analysis and design steps, and the experiments conducted in cooperation with other universities will be presented. Part of this work has been performed in the frame of the Network of Excellence Metamorphose and in the national project PRIN 2006 leaded by Roma Tre.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133464015","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598795
V. Eramo, M. Listanti, A. Cianfrani, F. Matera, L. Rea
The solution of routing and wavelength assignment (RWA) problem allows to overlay a logical topology, comprising logical connections and routers, on a physical topology, comprising optical fibers and optical crossconnects, using either lightpaths or super-lightpaths which use a simple bit level time division multiplexing. In this paper we introduce an add-drop function which allow to reuse the super-lightpath sub-channels. Being the mathematical problem computationally intractable we have used heuristic methods which show that the number of wavelengths required to overlay the same logical topology on the same physical topology is reduced up to 27% using the add-drop function.
{"title":"Performance evaluation for optical networks with OTDM Add-Drop functionality","authors":"V. Eramo, M. Listanti, A. Cianfrani, F. Matera, L. Rea","doi":"10.1109/ICTON.2008.4598795","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598795","url":null,"abstract":"The solution of routing and wavelength assignment (RWA) problem allows to overlay a logical topology, comprising logical connections and routers, on a physical topology, comprising optical fibers and optical crossconnects, using either lightpaths or super-lightpaths which use a simple bit level time division multiplexing. In this paper we introduce an add-drop function which allow to reuse the super-lightpath sub-channels. Being the mathematical problem computationally intractable we have used heuristic methods which show that the number of wavelengths required to overlay the same logical topology on the same physical topology is reduced up to 27% using the add-drop function.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132087606","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598370
I. Bala, G. Singh
Several coding alternatives for the implementation of OCDMA have been analyzed so far to improve the performance of the system. In this paper, integer lattice design based optical orthogonal code (OOC) has been discussed and analyzed for spectral amplitude coding schemes, applicable to both synchronous as well asynchronous incoherent OCDMA. Simplicity in code construction and flexibility in cross correlation control make this code a compelling candidate for future OCDMA applications. Signal to noise ratio (SNR) and bit error rate (BER) as a function of the number of users, code weight and userpsilas effective optical power have been analyzed for this code family. Further various parameters related to improvement of performance of BER have also been discussed in this paper.
{"title":"Performance considerations for Integer Lattice Design based OOC for incoherent optical CDMA system","authors":"I. Bala, G. Singh","doi":"10.1109/ICTON.2008.4598370","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598370","url":null,"abstract":"Several coding alternatives for the implementation of OCDMA have been analyzed so far to improve the performance of the system. In this paper, integer lattice design based optical orthogonal code (OOC) has been discussed and analyzed for spectral amplitude coding schemes, applicable to both synchronous as well asynchronous incoherent OCDMA. Simplicity in code construction and flexibility in cross correlation control make this code a compelling candidate for future OCDMA applications. Signal to noise ratio (SNR) and bit error rate (BER) as a function of the number of users, code weight and userpsilas effective optical power have been analyzed for this code family. Further various parameters related to improvement of performance of BER have also been discussed in this paper.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132592700","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598737
C. Bock, M. Thakur, T. Quinlan, S. Dudley, S. Walker
Wireless and optical integration is pivotal to the exploitation of future access solutions. Optics provides greater bandwidths and long reach while wireless offers easier deployment, mobility and freedom to end users. By combining both, service experience is highly enhanced. Single types of transmission systems indeed have their advantages, but integration is essential if broadband really is for all. PON (passive optical networks) services together with UWB (ultra-wide band) generate advanced access solutions that once deployed, offer quadruple-play integration of wireless, voice, data and video applications. This paper presents the current situation of wireless and optics integration together an access solution based on these principles.
{"title":"Integration of wireless and optics, future trends on access networks","authors":"C. Bock, M. Thakur, T. Quinlan, S. Dudley, S. Walker","doi":"10.1109/ICTON.2008.4598737","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598737","url":null,"abstract":"Wireless and optical integration is pivotal to the exploitation of future access solutions. Optics provides greater bandwidths and long reach while wireless offers easier deployment, mobility and freedom to end users. By combining both, service experience is highly enhanced. Single types of transmission systems indeed have their advantages, but integration is essential if broadband really is for all. PON (passive optical networks) services together with UWB (ultra-wide band) generate advanced access solutions that once deployed, offer quadruple-play integration of wireless, voice, data and video applications. This paper presents the current situation of wireless and optics integration together an access solution based on these principles.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127840131","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598402
S. Hellerbrand, N. Hanik
In the following, we will give an overview of some transmitter and receiver side techniques for the mitigation of chromatic dispersion (CD), polarization-mode dispersion (PMD) as well as intrachannel nonlinear effects. These include electronic predistortion as well as probabilistic receiver-side mitigation using maximum likelihood sequence estimation (MLSE). Particular emphasis is laid on the implementation complexity of the aforementioned techniques.
{"title":"Techniques for electronic mitigation of transmission impairments in fiber-optic communication systems","authors":"S. Hellerbrand, N. Hanik","doi":"10.1109/ICTON.2008.4598402","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598402","url":null,"abstract":"In the following, we will give an overview of some transmitter and receiver side techniques for the mitigation of chromatic dispersion (CD), polarization-mode dispersion (PMD) as well as intrachannel nonlinear effects. These include electronic predistortion as well as probabilistic receiver-side mitigation using maximum likelihood sequence estimation (MLSE). Particular emphasis is laid on the implementation complexity of the aforementioned techniques.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115920656","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598417
P. Sewell, T. Benson, A. Vukovic
In this presentation we discuss the extension of Mie scattering models of planar optical ASICS to allow for 3D effects. The use of genetic algorithms for optimised design demands fast solvers and therefore the emphasis is on computational efficiency as well as providing sufficient accuracy.
{"title":"3D effects in planar optical ASICs","authors":"P. Sewell, T. Benson, A. Vukovic","doi":"10.1109/ICTON.2008.4598417","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598417","url":null,"abstract":"In this presentation we discuss the extension of Mie scattering models of planar optical ASICS to allow for 3D effects. The use of genetic algorithms for optimised design demands fast solvers and therefore the emphasis is on computational efficiency as well as providing sufficient accuracy.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"229 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124208510","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598584
A. I. Smirnov, N. Ilin, I. G. Kondratiev
This paper is devoted to detailed research of an opportunity to use modern metamaterials for an efficient guiding of electromagnetic waves of various ranges (mainly: giga- and terahertz). The following basic questions are considered: the true surface waves [1] guided boundary of the metamaterial; the surface waves guided by layers of a metamaterial; the localized waves in lattices of resonance microelements. The special regard is devoted to mechanism of formation backward waves in discrete systems.
{"title":"Guiding properties of metamaterials","authors":"A. I. Smirnov, N. Ilin, I. G. Kondratiev","doi":"10.1109/ICTON.2008.4598584","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598584","url":null,"abstract":"This paper is devoted to detailed research of an opportunity to use modern metamaterials for an efficient guiding of electromagnetic waves of various ranges (mainly: giga- and terahertz). The following basic questions are considered: the true surface waves [1] guided boundary of the metamaterial; the surface waves guided by layers of a metamaterial; the localized waves in lattices of resonance microelements. The special regard is devoted to mechanism of formation backward waves in discrete systems.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124219632","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598664
S. Bjornstad, A. Kimsas
In the OpMiGua hybrid network, whether packets follow a circuit or a packet path is decided on a packet-by-packet basis. Packets following a circuit are given absolute priority with no packet loss or jitter. Packets following a packet switched path are statistically multiplexed. Circuits are wavelength-paths in a Wavelength Routed Optical Network (WRON), resulting in bandwidth granularity of a wavelength. In this paper, we propose the HPTS scheme, enabling a higher granularity of the OpMiGua guaranteed service (GST) circuit paths by employing time-slots. Nodes sharing a wavelength path are allocated time-slots according to their bandwidth needs. Best effort traffic accesses unused bandwidth within any time-slot, enabling high bandwidth utilization. Finally, the proposed network schemepsilas compatibility with GMPLS is briefly discussed.
{"title":"Hybrid packet/time slotted circuit switched scheme (HPTS)","authors":"S. Bjornstad, A. Kimsas","doi":"10.1109/ICTON.2008.4598664","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598664","url":null,"abstract":"In the OpMiGua hybrid network, whether packets follow a circuit or a packet path is decided on a packet-by-packet basis. Packets following a circuit are given absolute priority with no packet loss or jitter. Packets following a packet switched path are statistically multiplexed. Circuits are wavelength-paths in a Wavelength Routed Optical Network (WRON), resulting in bandwidth granularity of a wavelength. In this paper, we propose the HPTS scheme, enabling a higher granularity of the OpMiGua guaranteed service (GST) circuit paths by employing time-slots. Nodes sharing a wavelength path are allocated time-slots according to their bandwidth needs. Best effort traffic accesses unused bandwidth within any time-slot, enabling high bandwidth utilization. Finally, the proposed network schemepsilas compatibility with GMPLS is briefly discussed.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114795024","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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