Nonlinear Dynamics in Optical Systems最新文献

{"title":"Fast and slow self-phase modulation induced pulse shaping of subpicosecond pulses in semiconductor laser amplifiers","authors":"A. Dienes, M. Hong, J. Heritage","doi":"10.1364/nldos.1992.ma5","DOIUrl":"https://doi.org/10.1364/nldos.1992.ma5","url":null,"abstract":"Self- and cross-phase modulation (SPM, XPM) of picosecond pulses due to gain saturation in semiconductor laser amplifiers has been investigated, both theoretically and experimentally.1,2,3 Because of the large value of the so-called linewidth enhancement factor α, these effects can result in considerable nonlinear sweep and spectral broadening. The spectrally broadened pulses can be partially compressed1,2 by providing dispersion externally. It has also been shown3 that the quadratic shape of the gain spectrum can result in considerable positive second-order phase dispersion. For pulse durations of about 1 ps or shorter (and input energies in the 0.1-1 pj range) the fast n2 must also be considered. The gain saturation induced “slow” self phase modulation (SSPM) is an integrating, energy dependent effect. On the other hand, the fast n2 responds to the instantaneous intensity of the pulse, resulting in “fast” self phase modulation (FSPM). The interplay of saturation, two kinds of SPM and dispersion will result in complicated pulse shaping. In this paper, we investigate the evolution of subpicosecond pulses in semiconductor amplifiers using a differential equation similar to one used for studying saturated dye laser amplifiers.4 Under certain conditions, soliton-like compression effects are predicted.","PeriodicalId":441335,"journal":{"name":"Nonlinear Dynamics in Optical Systems","volume":"2 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":"117307496","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":"Quasi-Soliton Within a Distributed Bistable Optical System","authors":"G. Surdutovich","doi":"10.1364/nldos.1990.ob223","DOIUrl":"https://doi.org/10.1364/nldos.1990.ob223","url":null,"abstract":"In an arbitrary bistable distributed system -e.g. passive ring resonator with nonlinear medium and stationary input signal - spatially limited solitary initial perturbation (seed pulse) of a sufficiently large amplitude and arbitrary form turns into an asymtotically rectangular pulse with exponentially small instability increment (quasisoliton). The properties of the quasisoliton are analized within the frames of a different dispersion models. Such a quasisoliton regime was realized experimentally in acousto-electronic model system and in the system with bicompound injection laser and external cavity.","PeriodicalId":441335,"journal":{"name":"Nonlinear Dynamics in Optical Systems","volume":"39 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":"115203425","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 Correlation Dimension and Critical Phenomena in Complex Ginzburg-Lardan Mode","authors":"M. Rabinovich","doi":"10.1364/nldos.1992.thc2","DOIUrl":"https://doi.org/10.1364/nldos.1992.thc2","url":null,"abstract":"Summary not available at press time.","PeriodicalId":441335,"journal":{"name":"Nonlinear Dynamics in Optical Systems","volume":"55 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":"114401340","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":"Wave Competition, Squeezed States of Light, and Photon Superbunching in DFB System","authors":"A. Alodjants, S. M. Arakelian, L. P. Gevorkian, Y. Chilingarian","doi":"10.1364/nldos.1990.stsa584","DOIUrl":"https://doi.org/10.1364/nldos.1990.stsa584","url":null,"abstract":"A new method of formation of quantum states of the light in the linear system at dynamic diffraction is discussed for the first time. The approach gives a new opportunities for a verification of quantum properties of the light in experiment.","PeriodicalId":441335,"journal":{"name":"Nonlinear Dynamics in Optical Systems","volume":"43 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":"117274785","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":"Simulation of the Self-Pulsing Instability in an Inhomogeneously Broadened Single-Mode Laser by the Finite-Dimensional Model","authors":"V. Toronov","doi":"10.1364/nldos.1990.ld359","DOIUrl":"https://doi.org/10.1364/nldos.1990.ld359","url":null,"abstract":"We have investigated numerically the behaviour of the inhomogeneously broadened medium of single-mode unidirectional Lorentz-broadened laser in the self-pulsing regime. On the basis of this analysis, we have constructed the five-order set of differentional equations, which well describes the self­pulsing instability in laser in a certain band of the gain.","PeriodicalId":441335,"journal":{"name":"Nonlinear Dynamics in Optical Systems","volume":"87 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":"125004871","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":"Quantum Stairs and Multi-Rabi Chaos in a Driven Anharmonic Oscillator","authors":"A. E. Kaplan","doi":"10.1364/nldos.1990.oc510","DOIUrl":"https://doi.org/10.1364/nldos.1990.oc510","url":null,"abstract":"A single magnetized electron driven by the EM wave in the vicinity of the cyclotron frequency can exhibit large hysteretic resonance caused by a tiny relativistic change of its mass [1]. Consistent with the theory [1] this effect has recently been observed in experiment [2]. The theory of this most fundamental multi-stable interaction of light with matter can be developed using a simple model of a quantum anharmonic oscillator driven by a periodic force. Making a common assumption that quantum transitions occur only between neighboring slightly-nonequidistant eigenstates of the oscillator, one can describe the dynamics of the system by infinite number of coupled kinetic equations for the density matrix elements at each eigenstate. We found that the reaction of the system (expressed in the terms of expectation energy of excitation) dramatically depends on the speed of sweeping frequency of the driving force near the cyclotron resonance. If the driving frequency is swept downward infinitesimally slow and no dissipation is present, the system’s response shows strongly pronounced train of \"quantum stairs\" at the raising slope of the function \"energy vs. driving frequency\" (Fig. 1) starting at the main (cyclotron) frequency Ωr which is a resonant frequency of the unperturbed (i.e. harmonic) oscillator. The height of each of these stairs is ħΩr and they are equidistantly spaced by ΔΩsp = Ωn−Ωn−1 such that ΔΩsp/Ωr = ħΩr/moc2 = krre/α, where kr = Ωr/c, re = e2/moc2 is a classical electron radius, and α = e2/ħc = 1/137 is a fine structure constant; e.g., at λr = 2mm, ΔΩsp = 180.76 Hz. The stair of each consequent order n can be interpreted as an adiabaticly slow Landau-Zenner transition between (n-1)th and n-th excited level respectively. However, when the frequency sweeping is sufficiently fast, these transitions become oscillatory with the oscillations at each one of them being due to a Rabi frequency pertinent to that individual transition. Since all of them are coupled and since due to the anharmonicity all the Rabi oscillations form an infinite set of incommensurate frequencies, these oscillations evolve into strongly chaotic motion (Fig. 2). These quantum effects are universal and should exist in any anharmonic oscillator as long as its anharmonicity is much stronger than dissipation, i.e. when ΔΩspτ ≫ 1, where τ is relaxation time of the system (for a single cyclotron electron with its energy dissipation attributed to the synchrotron radiation, ΔΩspτ = 3/2α = 205.5). This work is supported by AFOSR.","PeriodicalId":441335,"journal":{"name":"Nonlinear Dynamics in Optical Systems","volume":"15 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":"129872248","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":"Comparison Between Two-Level and Inhomogeneously Broadened FIR Three-Level Laser Dynamics","authors":"R. Vilaseca, E. Roldán, G. D. de Valcárcel, R. Corbalán","doi":"10.1364/nldos.1990.ld405","DOIUrl":"https://doi.org/10.1364/nldos.1990.ld405","url":null,"abstract":"The Doppler-broadened FIR three-level laser equations and solutions are analysed and compared to those of a Lorenz-Haken laser. The influence of velocity averaging and optical pumping is found to be large, but it does not give rise to strong new features on the dynamic behavior, which remains similar to that of a Lorenz-Haken laser with effective parameters. Noticeable differences, however, are found between both classes of lasers.","PeriodicalId":441335,"journal":{"name":"Nonlinear Dynamics in Optical Systems","volume":"58 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":"128258736","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":"Opto-Thermal Bistable Cavities with Localized Absorption under Modulated Excitation","authors":"J. Farjas, F. Boixader, G. Orriols, J. Massaneda, F. Pi","doi":"10.1364/nldos.1992.tuc17","DOIUrl":"https://doi.org/10.1364/nldos.1992.tuc17","url":null,"abstract":"Opto-Thermal Bistability with Localized Absorption (BOITAL) deals with etalons in which the light absorption occurs in one of the reflective coatings while the thermo-optic spacer is transparent. The separation of functions within the bistable system permits an independent and, therefore, easier optimisation of both functions and also introduces the possibility of complex structures with more than one absorbing film and/or with various layers of different thermo-optic materials [1]. These kinds of structures possess composite feedback mechanisms and may be used to achieve different logic functions and to study dynamic instabilities in passive optical systems [2].","PeriodicalId":441335,"journal":{"name":"Nonlinear Dynamics in Optical Systems","volume":"39 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":"128451065","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":"Transient behaviour of fibre optic Brillouin ring lasers","authors":"R. Hereth, D. Garus, F. Schliep","doi":"10.1364/nldos.1992.mc26","DOIUrl":"https://doi.org/10.1364/nldos.1992.mc26","url":null,"abstract":"Stimulated Brillouin scattering (SBS) is the dominant non-linearity in silica optical fibres. In high­finesse all-fibre ring resonators with fibre lengths of the order of 10 m stimulated Brillouin scattering can be observed at input power levels in the range of 10 to 100 μW [1]. Above pump threshold fibre optic ring resonators show intensive laser oscillation at the Stokes wavelength and therefore are called Brillouin ring lasers (BRL). An important application of Brillouin ring lasers is the all-fibre optic ring laser gyro [2].","PeriodicalId":441335,"journal":{"name":"Nonlinear Dynamics in Optical Systems","volume":"44 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":"128895363","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":"Nonlinear Stochastic Dynamics of Semiconductor Laser Gain Switching","authors":"A. Mecozzi, A. Sapia, P. Spanó","doi":"10.1364/nldos.1990.tdsls32","DOIUrl":"https://doi.org/10.1364/nldos.1990.tdsls32","url":null,"abstract":"A particular structure of the intensity fluctuations during semiconductor laser gain switching is experimentally found. This new effect is due to the field-carriers interaction inside the laser cavity.","PeriodicalId":441335,"journal":{"name":"Nonlinear Dynamics in Optical Systems","volume":"18 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":"130866613","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}