Pub Date : 2008-01-31DOI: 10.1109/LEOSWT.2008.4444431
C. G. Reimbert, A. Minzoni, N. F. Smyth, A. Worthy
The interaction of two in phase and out of phase guided waves with angular momentum in a nematic liquid crystal is mathematically modelled. It is shown how bound states, such as dipoles, can form.
{"title":"Dipole soliton formation in nematic liquid crystals","authors":"C. G. Reimbert, A. Minzoni, N. F. Smyth, A. Worthy","doi":"10.1109/LEOSWT.2008.4444431","DOIUrl":"https://doi.org/10.1109/LEOSWT.2008.4444431","url":null,"abstract":"The interaction of two in phase and out of phase guided waves with angular momentum in a nematic liquid crystal is mathematically modelled. It is shown how bound states, such as dipoles, can form.","PeriodicalId":114191,"journal":{"name":"2008 IEEE/LEOS Winter Topical Meeting Series","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123630007","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 : 2008-01-31DOI: 10.1109/LEOSWT.2008.4444370
B. Luther-Davies, D. Choi, A. Prasad, R. Wang, D. Bulla, C. Zha, M. Pelusi, V. Ta'eed, M. Lamont, L. Fu, D. Moss, K. Finsterbusch, H. Nguyen, B. Eggleton
This research focuses on several aspects of chalcogenide all-optical processors. This study has chosen glasses in the Ge-As-Se system with the aim of optimising glass composition to obtain low loss, high nonlinearity and glass stability, whilst complementary efforts are focussed on the production, optimisation and application of chalcogenide waveguide devices to all-optical of high-speed telecommunication signals. Devices have been characterised in realistic telecommunications conditions with the eventual aim being to validate performance at rates up to 640 Gb/s.
{"title":"Nonlinear materials for integrated ultra-fast all-optical devices","authors":"B. Luther-Davies, D. Choi, A. Prasad, R. Wang, D. Bulla, C. Zha, M. Pelusi, V. Ta'eed, M. Lamont, L. Fu, D. Moss, K. Finsterbusch, H. Nguyen, B. Eggleton","doi":"10.1109/LEOSWT.2008.4444370","DOIUrl":"https://doi.org/10.1109/LEOSWT.2008.4444370","url":null,"abstract":"This research focuses on several aspects of chalcogenide all-optical processors. This study has chosen glasses in the Ge-As-Se system with the aim of optimising glass composition to obtain low loss, high nonlinearity and glass stability, whilst complementary efforts are focussed on the production, optimisation and application of chalcogenide waveguide devices to all-optical of high-speed telecommunication signals. Devices have been characterised in realistic telecommunications conditions with the eventual aim being to validate performance at rates up to 640 Gb/s.","PeriodicalId":114191,"journal":{"name":"2008 IEEE/LEOS Winter Topical Meeting Series","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125887444","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 : 2008-01-31DOI: 10.1109/LEOSWT.2008.4444464
K. Nakajima, K. Kurokawa, T. Matsui, K. Tajima
This paper reviews recent progress on low loss photonic crystal fibre (PCF) and its application as a transmission medium. Endlessly single-mode PCF is beneficial for realizing future wide-band and high-speed optical network.
{"title":"Wide-band and high-speed transmission over photonic crystal fibre","authors":"K. Nakajima, K. Kurokawa, T. Matsui, K. Tajima","doi":"10.1109/LEOSWT.2008.4444464","DOIUrl":"https://doi.org/10.1109/LEOSWT.2008.4444464","url":null,"abstract":"This paper reviews recent progress on low loss photonic crystal fibre (PCF) and its application as a transmission medium. Endlessly single-mode PCF is beneficial for realizing future wide-band and high-speed optical network.","PeriodicalId":114191,"journal":{"name":"2008 IEEE/LEOS Winter Topical Meeting Series","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124674967","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 : 2008-01-31DOI: 10.1109/LEOSWT.2008.4444397
J. Boggio, J. Marconi, S. Bickham, H. Fragnito
In this paper we review recent experiments where well designed highly nonlinear fibers (HNLFs) give rise to flat gain over 115 nm is, also we discuss the feasibility of broadband two-pump optical parametric amplifiers (2P-FOPAs). It is believed that further improvements in designing and fabrication of HNLFs could result in 2P-OPAs with more than 200 nm. However, there is still one factor that we observed enhanced the gain ripple, and this is a phase mismatch introduced by the real part of the Raman susceptibility. Nevertheless, it was observed that the amount of gain ripple introduced by this effect varied from fiber to fiber.
{"title":"Two-pump fiber OPAs with flat gain over 100 nm bandwidth","authors":"J. Boggio, J. Marconi, S. Bickham, H. Fragnito","doi":"10.1109/LEOSWT.2008.4444397","DOIUrl":"https://doi.org/10.1109/LEOSWT.2008.4444397","url":null,"abstract":"In this paper we review recent experiments where well designed highly nonlinear fibers (HNLFs) give rise to flat gain over 115 nm is, also we discuss the feasibility of broadband two-pump optical parametric amplifiers (2P-FOPAs). It is believed that further improvements in designing and fabrication of HNLFs could result in 2P-OPAs with more than 200 nm. However, there is still one factor that we observed enhanced the gain ripple, and this is a phase mismatch introduced by the real part of the Raman susceptibility. Nevertheless, it was observed that the amount of gain ripple introduced by this effect varied from fiber to fiber.","PeriodicalId":114191,"journal":{"name":"2008 IEEE/LEOS Winter Topical Meeting Series","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129757304","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 : 2008-01-31DOI: 10.1109/LEOSWT.2008.4444421
Claudio Conti, Andrea Fratalocchi, M. Peccianti, Giancarlo Ruocco, Stefano Trillo
In this paper, we discuss the effect of a nonlinearity that outweighs diffraction in a defocusing nonlinear Kerr-like medium. In particular we show that a dark waveform, in this regime, focuses down until it develops a shock wave (singularity), which is then regularized by weak diffraction, showing the onset of fast oscillations characteristic of a so-called dispersive shock wave. The region filled with oscillations expand and behaving as a gas of non-interacting particles (multiple solitons). Here we report its experimental demonstration in a medium with thermal nonlinearity and the relative theory. Due to its generality, the shock and the post-shock dynamics survive the averaging effect of even strong nonlocality of the nonlinear response, thus being observable for a wide class of nonlinear materials such as liquid crystals, photorefractives, etc. Furthermore, in spite of its complexity, we show that the phenomenon is amenable to a completely analytical description in the local limit.
{"title":"Gas of dark solitons generated by an optical shock","authors":"Claudio Conti, Andrea Fratalocchi, M. Peccianti, Giancarlo Ruocco, Stefano Trillo","doi":"10.1109/LEOSWT.2008.4444421","DOIUrl":"https://doi.org/10.1109/LEOSWT.2008.4444421","url":null,"abstract":"In this paper, we discuss the effect of a nonlinearity that outweighs diffraction in a defocusing nonlinear Kerr-like medium. In particular we show that a dark waveform, in this regime, focuses down until it develops a shock wave (singularity), which is then regularized by weak diffraction, showing the onset of fast oscillations characteristic of a so-called dispersive shock wave. The region filled with oscillations expand and behaving as a gas of non-interacting particles (multiple solitons). Here we report its experimental demonstration in a medium with thermal nonlinearity and the relative theory. Due to its generality, the shock and the post-shock dynamics survive the averaging effect of even strong nonlocality of the nonlinear response, thus being observable for a wide class of nonlinear materials such as liquid crystals, photorefractives, etc. Furthermore, in spite of its complexity, we show that the phenomenon is amenable to a completely analytical description in the local limit.","PeriodicalId":114191,"journal":{"name":"2008 IEEE/LEOS Winter Topical Meeting Series","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129565096","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 : 2008-01-31DOI: 10.1109/LEOSWT.2008.4444410
D. Mechin, R. Provo, J. Harvey
We present recent theoretical and experimental results concerning transparent ultra-fast switches, and potentially noise-free wavelength converters using schemes based on the Bragg scattering four-wave mixing process in highly nonlinear fibers.
{"title":"Applications of Bragg scattering in high-speed optical telecommunication systems","authors":"D. Mechin, R. Provo, J. Harvey","doi":"10.1109/LEOSWT.2008.4444410","DOIUrl":"https://doi.org/10.1109/LEOSWT.2008.4444410","url":null,"abstract":"We present recent theoretical and experimental results concerning transparent ultra-fast switches, and potentially noise-free wavelength converters using schemes based on the Bragg scattering four-wave mixing process in highly nonlinear fibers.","PeriodicalId":114191,"journal":{"name":"2008 IEEE/LEOS Winter Topical Meeting Series","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127338554","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 : 2008-01-31DOI: 10.1109/LEOSWT.2008.4444406
H. Takesue
A 1.5-mum band entanglement source based on SFWM in DSF and quantum communication experiments using the source were described. Important future work is to realize entanglement swapping using two independent fiber sources and a quantum relay.
{"title":"Quantum communication experiments using entangled photons generated in dispersion shifted fiber","authors":"H. Takesue","doi":"10.1109/LEOSWT.2008.4444406","DOIUrl":"https://doi.org/10.1109/LEOSWT.2008.4444406","url":null,"abstract":"A 1.5-mum band entanglement source based on SFWM in DSF and quantum communication experiments using the source were described. Important future work is to realize entanglement swapping using two independent fiber sources and a quantum relay.","PeriodicalId":114191,"journal":{"name":"2008 IEEE/LEOS Winter Topical Meeting Series","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123416241","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 : 2008-01-31DOI: 10.1109/LEOSWT.2008.4444391
K. Croussore, Guifang Li
Phase and amplitude regeneration is demonstrated for NRZ-BPSK signals degraded by both phase and amplitude distortions using a symmetric-pump phase-sensitive amplifier, implemented in 5.64 meters of bismuth-oxide highly nonlinear fiber.
{"title":"BPSK phase and amplitude regeneration using a traveling-wave phase-sensitive amplifier","authors":"K. Croussore, Guifang Li","doi":"10.1109/LEOSWT.2008.4444391","DOIUrl":"https://doi.org/10.1109/LEOSWT.2008.4444391","url":null,"abstract":"Phase and amplitude regeneration is demonstrated for NRZ-BPSK signals degraded by both phase and amplitude distortions using a symmetric-pump phase-sensitive amplifier, implemented in 5.64 meters of bismuth-oxide highly nonlinear fiber.","PeriodicalId":114191,"journal":{"name":"2008 IEEE/LEOS Winter Topical Meeting Series","volume":"273 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116497785","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 : 2008-01-31DOI: 10.1109/LEOSWT.2008.4444428
A. Piccardi, M. Peccianti, G. Assanto
Spatial soliton interactions, such as crossing, merging and spiraling, have been widely studied in the past years as means to exploit non-locality and ways to implement all-optical signal addressing or processing. With reference to spiraling, if attraction provided by the non-linear potential is exactly balanced by the system momentum, the initial soliton distance remains unchanged over the propagation. This phenomenon has been studied in different materials with Kerr, photorefractive or thermal non-linearities, both theoretically and experimentally. However, all such studies have been conducted acting on the initial conditions or comparing distinct longitudinal sections. Here we present an experimental study on soliton spiraling in nematic liquid crystal with another approach: we gain non-linear control over the two-soliton cluster by simply varying the total power excitation of the system.
{"title":"Non-linear control of soliton spiraling in nematic liquid crystals","authors":"A. Piccardi, M. Peccianti, G. Assanto","doi":"10.1109/LEOSWT.2008.4444428","DOIUrl":"https://doi.org/10.1109/LEOSWT.2008.4444428","url":null,"abstract":"Spatial soliton interactions, such as crossing, merging and spiraling, have been widely studied in the past years as means to exploit non-locality and ways to implement all-optical signal addressing or processing. With reference to spiraling, if attraction provided by the non-linear potential is exactly balanced by the system momentum, the initial soliton distance remains unchanged over the propagation. This phenomenon has been studied in different materials with Kerr, photorefractive or thermal non-linearities, both theoretically and experimentally. However, all such studies have been conducted acting on the initial conditions or comparing distinct longitudinal sections. Here we present an experimental study on soliton spiraling in nematic liquid crystal with another approach: we gain non-linear control over the two-soliton cluster by simply varying the total power excitation of the system.","PeriodicalId":114191,"journal":{"name":"2008 IEEE/LEOS Winter Topical Meeting Series","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133433218","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 : 2008-01-31DOI: 10.1109/LEOSWT.2008.4444429
C. G. Reimbert, A. Minzoni, B. Skuse, N. F. Smyth, T. Marchant, A. Worthy
The mathematical modelling of guided wave (nematicon) propagation in liquid crystals is considered. Model equations are derived based on suitable trial functions in an averaged Lagrangian. These equations are used to model nematicon interactions.
{"title":"Mathematical modelling of nematicons and their interactions","authors":"C. G. Reimbert, A. Minzoni, B. Skuse, N. F. Smyth, T. Marchant, A. Worthy","doi":"10.1109/LEOSWT.2008.4444429","DOIUrl":"https://doi.org/10.1109/LEOSWT.2008.4444429","url":null,"abstract":"The mathematical modelling of guided wave (nematicon) propagation in liquid crystals is considered. Model equations are derived based on suitable trial functions in an averaged Lagrangian. These equations are used to model nematicon interactions.","PeriodicalId":114191,"journal":{"name":"2008 IEEE/LEOS Winter Topical Meeting Series","volume":"108 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134092650","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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