Nonlinear Guided Waves and Their Applications最新文献

{"title":"All-Optical Switching in Integrated Directional Couplers and Mach Zehnder Interferometers with Cascading","authors":"R. Schiek, Y. Baek, G. Krijnen, G. Stegeman","doi":"10.1364/nlgw.1996.suc.4","DOIUrl":"https://doi.org/10.1364/nlgw.1996.suc.4","url":null,"abstract":"The second-order nonlinear interaction between a fundamental light wave and its second harmonic causes energy transfer between the interacting waves (second harmonic generation (SHG)) and modifies their phases nonlinearly (cascaded nonlinearity) [1]. This implies that all-optical switching can be implemented on the basis of cascading in phase-sensitive waveguide structures [2].","PeriodicalId":262564,"journal":{"name":"Nonlinear Guided Waves and Their Applications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127981935","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}

{"title":"Spatial Solitons Caused by Cascaded Second-Order Nonlinearity in LiNbO3 Planar Waveguide","authors":"Y. Baek, R. Schiek, G. Stegeman","doi":"10.1364/nlgw.1995.nthb1","DOIUrl":"https://doi.org/10.1364/nlgw.1995.nthb1","url":null,"abstract":"Self-trapped optical solitons were proposed from the early days of nonlinear optics and their demonstration based on the third-order nonlinearity have been reported in both the temporal and spatial regimes. 1-3 Recently it has been predicted that a cascaded second-order nonlinearity can produce effects similar to third-order nonlinearities with orders of magnitude higher nonlinear phase shifts. In fact, large nonlinear phase shifts have already been reported.4-5 Presented here is the first demonstration of spatial solitons due to the cascaded second-order nonlinearity.","PeriodicalId":262564,"journal":{"name":"Nonlinear Guided Waves and Their Applications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131828459","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}

{"title":"Two Dimensional Spatial Solitons with Second-Order Nonlinearities","authors":"L. Torner, C. Menyuk, W. Torruellas, G. Stegeman","doi":"10.1364/nlgw.1995.nthb4","DOIUrl":"https://doi.org/10.1364/nlgw.1995.nthb4","url":null,"abstract":"In addition to harmonic generation and frequency-mixing, intense light beams propagating in χ(2) nonlinear media exhibit a variety of self- and cross-phase modulation effects which until recently were commonly thought to occur only in χ(3) interactions. One important example is the propagation of soliton-like waves, in which the fundamental and second-harmonic waves mutually focus and trap each other. The (1+1) trapping (i.e. one transverse dimension and one propagation dimension) yields both spatial and temporal solitons that can in principle occur in planar waveguides and fibers, respectively [1]-[2] Although spatial solitons appear to be easier to obtain experimentally than temporal solitons, their excitation still requires nearly phase-matched propagation in high quality planar waveguides. In this paper we report our investigations on the propagation of Gaussian beams in bulk χ(2) media [3]. Contrarily to the conventional self focusing case in bulk Kerr like media, we show that stable 2D-soliton like propagation is possible, in the paraxial, in phase matchable materials with a quadratic nonlinear response. Under a variety of currently available experimental conditions, in the presence of finite mismatch and linear walk-off between the fundamental and second harmonic waves, we predict the experimental observation of such new physical processes.","PeriodicalId":262564,"journal":{"name":"Nonlinear Guided Waves and Their Applications","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124480848","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}

{"title":"History of Optical Solitons","authors":"A. Hasegawa","doi":"10.1364/IPR.1995.L1","DOIUrl":"https://doi.org/10.1364/IPR.1995.L1","url":null,"abstract":"Summary not available.","PeriodicalId":262564,"journal":{"name":"Nonlinear Guided Waves and Their Applications","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114396452","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}

{"title":"New Technical Career Strategy","authors":"Milton Chang","doi":"10.1364/IPR.1995.L4","DOIUrl":"https://doi.org/10.1364/IPR.1995.L4","url":null,"abstract":"Tremendous opportunities await people with a technical education who are willing to take a broader view of their skills. A low-risk model to start a business will also be presented.","PeriodicalId":262564,"journal":{"name":"Nonlinear Guided Waves and Their Applications","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116492621","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}

{"title":"Integrated Photonics in the RACE Program","authors":"P. Lagasse","doi":"10.1364/IPR.1995.L3","DOIUrl":"https://doi.org/10.1364/IPR.1995.L3","url":null,"abstract":"The most significant research results obtained in the European RACE II program in the field of integrated photonic circuits and their system applications will be reviewed.","PeriodicalId":262564,"journal":{"name":"Nonlinear Guided Waves and Their Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125981142","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}

{"title":"Optical Power Limiting By SHG In The Čerenkov Regime","authors":"G. Krijnen, G. Stegeman, H. Hoekstra","doi":"10.1364/nlgw.1995.nthc5","DOIUrl":"https://doi.org/10.1364/nlgw.1995.nthc5","url":null,"abstract":"The interest in χ(2)-materials and related nonlinear wave-propagation effects has been driven for a long time by potential applications in efficient blue-light generation by Second Harmonic Generation (SHG) and electro-optical switching [1]. From a practical point of view the interest in SHG has been dominated by guided mode - guided mode (here referred to as type A) interactions rather than by guided mode - radiation mode (type B) interactions (also called Čerenkov radiation) since in the latter case analytical relations are difficult to obtain (due to the problems associated with normalisation of radiation modes) and because the geometrical shape of the emerging SH light is not favourable. Numerical studies on type B interactions [2] have merely focused on the SHG efficiency of structures in which the index of the the core at \u0000 \u0000 \u0000 2\u0000 ω\u0000 \u0000 (\u0000 \u0000 \u0000 n\u0000 c\u0000 \u0000 2\u0000 ω\u0000 \u0000 \u0000 \u0000 )\u0000 \u0000 \u0000 \u0000 is larger than the index of the cladding at \u0000 \u0000 \u0000 2\u0000 ω\u0000 \u0000 (\u0000 \u0000 \u0000 n\u0000 \u0000 cl\u0000 \u0000 \u0000 2\u0000 ω\u0000 \u0000 \u0000 \u0000 )\u0000 \u0000 \u0000 \u0000 and in which both are larger than the effective index of the guided modes at \u0000 \u0000 \u0000 ω\u0000 \u0000 (\u0000 \u0000 \u0000 N\u0000 \u0000 eff\u0000 \u0000 ω\u0000 \u0000 \u0000 )\u0000 \u0000 \u0000 \u0000 . In this paper we report on numerical investigations on type B SHG of structures with \u0000 \u0000 \u0000 \u0000 n\u0000 \u0000 cl\u0000 \u0000 \u0000 2\u0000 ω\u0000 \u0000 \u0000 >\u0000 \u0000 n\u0000 c\u0000 \u0000 2\u0000 ω\u0000 \u0000 \u0000 >\u0000 \u0000 N\u0000 \u0000 eff\u0000 \u0000 ω\u0000 \u0000 \u0000 \u0000 . We find that in the Čerenkov regime the depletion of the fundamental can be almost complete when there is phase-matching to a leaky mode at 2ω due to the high propagation losses (10-1000 dB/cm) of these modes [3], The increasingly more complete conversion with increasing input power makes this type of interaction very interesting for optical power limiting of the input beam at co. Benefits of this scheme are a large dynamic range, the potential absence of heating (because it does not require intrinsic absorption), adjustable limiting levels and a wide wavelength bandwidth.","PeriodicalId":262564,"journal":{"name":"Nonlinear Guided Waves and Their Applications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116085937","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}

{"title":"All-optical multiplexing of femtosecond signals using an AlGaAs nonlinear directional coupler","authors":"Jin-U. Kang, G. Stegeman, J. Aitchison","doi":"10.1049/EL:19950094","DOIUrl":"https://doi.org/10.1049/EL:19950094","url":null,"abstract":"One of the most powerful applications of integrated all optical switching devices is the multi/demultiplexing of high repetition rate signals. All-optical demultiplexing using nonlinear directional couplers (NLDC) has been successfully demonstrated in recent years[1]. All-optical multiplexing has also been demonstrated using fibers[2]. However, because of the weak nonlinearity in the fiber, fiber lengths on the order of kilometers are required. Thus, such devices suffer from long transit times which can be unacceptable. The passive means of multiplexing, using 3 dB couplers, Y-junctions and such, suffer from a 3 dB loss. Using strong pump pulses to control a signal pulse train through cross-phase modulation, we demonstrate an efficient and compact method of multiplexing femtosecond signals using a NLDC.","PeriodicalId":262564,"journal":{"name":"Nonlinear Guided Waves and Their Applications","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121380900","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}

{"title":"All-optical buffers via localization of two-color quadratic gap solitons","authors":"G. Assanto, C. Conti, S. Trillo","doi":"10.1364/nlgw.1998.nwb.2","DOIUrl":"https://doi.org/10.1364/nlgw.1998.nwb.2","url":null,"abstract":"Optical gap solitons are a promising approach towards the realization of all-optical buffers and memories in nonlinear waveguides with Bragg resonant gratings [1]. In fact they permit to localize the e.m. energy at zero-velocity in the laboratory frame, in a frequency range where the linear propagation is otherwise forbidden. A recent experiment on slowly-traveling localized states has been reported by Eggleton et al. in an index-modulated fiber through the Kerr effect [2]. However, the trapping of zero velocity solitons within the grating is still an open issue, despite the fact that perfectly steady gap solitons could become the basic elements in all-optical memories. More recently, in the context of parametric quadratic effects, structures with distributed-feedback gratings (DFBG), Bragg-coupled to one or both frequencies in media for Second-Harmonic Generation (SH G), have been shown to support two-color gap solitons, i.e. localized energy states of trapped field components at the fundamental (FF) and its second harmonic (SH), based on the interplay of grating dispersion, parametric gain and cascading phase shifts [3-7]. In this Communication we numerically demonstrate that stationary gap simultons can be excited in a quadratically nonlinear DBFG via inelastic scattering of pulses launched at the FF, and can be detected using a similar ”reading” beam.","PeriodicalId":262564,"journal":{"name":"Nonlinear Guided Waves and Their Applications","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115366756","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}

{"title":"An Improved Perturbation Theory for Optical Solitons Near the Zero-Dispersion Point","authors":"B. Malomed, I. Uzunov, F. Lederer","doi":"10.1364/nlgw.1996.sad.8","DOIUrl":"https://doi.org/10.1364/nlgw.1996.sad.8","url":null,"abstract":"In communication lines operated near the zero-dispersion point, the\u0000 third-order dispersion (TOD) can strongly affect the pulse dynamics.\u0000 Hence, it is necessary to develop proper theoretical tools for this\u0000 case. Besides the numerical methods, a perturbation theory that can\u0000 take into account the bandwidth-limited amplification (BLA) and\u0000 nonlinear gain (NLG) or losses is required. The latter perturbations\u0000 can considerably reduce soliton interactions. With regard to a\u0000 combined effect of TOD and BLA, it was shown [1] that, e.g., a decay\u0000 of a two-soliton bound state caused by TOD can be prevented by BLA. A\u0000 new idea put forward in [2, 3] was that BLA which compensates for the\u0000 linear and nonlinear losses can, simultaneously, absorb the resonance\u0000 radiation emitted under the action of TOD, thus lending the soliton a\u0000 much better stability. This effect has been experimentally observed in\u0000 [4]. For large values of TOD, however, the soliton was obtained\u0000 numerically [3] in a state with a conspicuous velocity, which differed\u0000 from that predicted by the usual perturbation approach [5] by a factor\u0000 of 2.","PeriodicalId":262564,"journal":{"name":"Nonlinear Guided Waves and Their Applications","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124439130","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}