- 标题
- 摘要
- 关键词
- 实验方案
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FibAR: Embedding Optical Fibers in 3D Printed Objects for Active Markers in Dynamic Projection Mapping
摘要： We experimentally investigate mutual information and generalized mutual information for coherent optical transmission systems. The impact of the assumed channel distribution on the achievable rate is investigated for distributions in up to four dimensions. Single channel and wavelength-division multiplexing (WDM) transmission over transmission links with and without inline dispersion compensation are studied. We show that for conventional WDM systems without inline dispersion compensation, a circularly symmetric complex Gaussian distribution is a good approximation of the channel. For other channels, such as with inline dispersion compensation, this is no longer true and gains in the achievable information rate are obtained by considering more sophisticated four-dimensional (4D) distributions. We also show that for nonlinear channels, gains in the achievable information rate can also be achieved by estimating the mean values of the received constellation in four dimensions. The highest gain for such channels is seen for a 4D correlated Gaussian distribution.
关键词： mutual Information,digital communication,fiber nonlinear optics,optical fiber communication,Channel models
更新于2025-09-23 15:19:57
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Nonlinear Optics in Dielectric Guided-Mode Resonant Structures and Resonant Metasurfaces
摘要： Nonlinear optics is an important area of photonics research for realizing active optical functionalities such as light emission, frequency conversion, and ultrafast optical switching for applications in optical communication, material processing, precision measurements, spectroscopic sensing and label-free biological imaging. An emerging topic in nonlinear optics research is to realize high efficiency optical functionalities in ultra-small, sub-wavelength length scale structures by leveraging interesting optical resonances in surface relief metasurfaces. Such artificial surfaces can be engineered to support high quality factor resonances for enhanced nonlinear optical interaction by leveraging interesting physical mechanisms. The aim of this review article is to give an overview of the emerging field of nonlinear optics in dielectric based sub-wavelength periodic structures to realize efficient harmonic generators, wavelength mixers, optical switches etc. Dielectric metasurfaces support the realization of high quality-factor resonances with electric field concentrated either inside or in the vicinity of the dielectric media, while at the same time operate at high optical intensities without damage. The periodic dielectric structures considered here are broadly classified into guided-mode resonant structures and resonant metasurfaces. The basic physical mechanisms behind guided-mode resonances, electromagnetically-induced transparency like resonances and bound-states in continuum resonances in periodic photonic structures are discussed. Various nonlinear optical processes studied in such structures with example implementations are also reviewed. Finally, some future directions of interest in terms of realizing large-area metasurfaces, techniques for enhancing the efficiency of the nonlinear processes, heterogenous integration, and extension to non-conventional wavelength ranges in the ultra-violet and infrared region are discussed.
关键词： harmonic generation,guided-mode resonance,four-wave mixing,Mie scattering,optical resonances,nonlinear optics,sub-wavelength gratings,Fano resonances,optical switching
更新于2025-09-23 15:19:57
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Single Molecule Nonlinearity in a Plasmonic Waveguide
摘要： Plasmonic waveguides offer the unique possibility to confine light far below the diffraction limit. Past room temperature experiments focused on efficient generation of single waveguide plasmons by a quantum emitter. However, only the simultaneous interaction of the emitter with multiple plasmonic fields would lead to functionality in a plasmonic circuit. Here, we demonstrate the nonlinear optical interaction of a single molecule and propagating plasmons. An individual terrylene diimide (TDI) molecule is placed in the nanogap between two single-crystalline silver nanowires. A visible wavelength pump pulse and a red-shifted depletion pulse travel along the waveguide, leading to stimulated emission depletion (STED) in the observed fluorescence. The efficiency increases by up to a factor of 50 compared to far-field excitation. Our study thus demonstrates remote nonlinear four-wave mixing at a single molecule with propagating plasmons. It paves the way toward functional quantum plasmonic circuits and improved nonlinear single-molecule spectroscopy.
关键词： quantum emitter,nonlinear optics,stimulated emission depletion STED,two-wire transmission line,single-crystalline silver flake,plasmonic nanocircuit
更新于2025-09-23 15:19:57
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Tunable hybrid spectral filter and time-division multiplexing of second-order fluorescence controlled by phonon and dressing on Pr <sup>3+</sup> :YSO
摘要： Atom-like nonlinear responses of rare earth doped crystal Pr3+:Y2SiO5 (Pr3+: YSO) exhibit unique features compared with other nonlinear crystals. The responses become more interesting, while Pr3+: YSO is modulated simultaneously by temperature and multi-parameters related to dressed state. The generations of Stokes and fluorescence (FL) signals are demonstrated in both time and spectral domains. Here, we are presenting a new controlling strategy by interaction between dressing and phonon on Pr3+: YSO to manipulate the intensity of Stokes and FL signals. Interaction between dressing and phonon leads to more stable nonlinear response of the YSO crystal, which is very important for integrated quantum photonic device stability and multi-functionality. Also, we have realized tunable hybrid spectral filter (narrow-band pass notch filter (NBPNF), narrow-band stop notch filter (NBSNF)) and time-division multiplexing router on Pr3+: YSO by controlling the interaction between dressing and phonons. Tunable hybrid spectral filter and pure NBPNF are realized from dressing dip of Autler-Townes (AT) splitting and spectral intensity Stokes emission peak. Also, time-division multiplexing router is realized by time-domain adiabatic expansion. Furthermore, optical switch between tunable hybrid spectral filter to pure NBPNF is realized from dressing dip (AT splitting) to spectral intensity Stokes emission peak. Our experimental results suggests advanced technique for realizing tunable hybrid spectral filter with a contrast of about 98%, and optical time-division multiplexing router with channel equalization is about 85%.
关键词： four wave mixing,nonlinear optics,dressing,hybrid,optical device,fluorescence and phonon,filter
更新于2025-09-23 15:19:57
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Numerical modeling & analysis of AsSe2-As2S5 chalcogenide based step-index optical fiber for nonlinear applications
摘要： In this paper, we have proposed a chalcogenide-based step-index optical fiber with AsSe2 chalcogenide glass as core and As2S5 chalcogenide glass as cladding. It is designed and numerically analyzed for different values of radius of the core of the optical fiber. The chalcogenide-based step-index optical fiber, with a proposed value for its radius of the core, is then simulated for supercontinuum generation in the mid-infrared region by injecting an input pulse of 50 fs duration and peak power of 5000 W for different propagating lengths of the fiber.
关键词： As2S5 chalcogenide glass,Step-index optical fiber,AsSe2 chalcogenide glass,Nonlinear optics,Supercontinuum generation
更新于2025-09-23 15:19:57
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Investigations on single crystal growth and nonlinear optical studies of 2-Hydroxy-1-naphthaldehyde
摘要： The optically good quality single crystals of 2-Hydroxy-1-naphthaldehyde (2H1N) were grown by vertical Bridgman method. The thermal behavior of the grown crystal was studied by thermogravimetric and differential thermal analysis (TG-DTA). The cell parameters of the grown 2H1N crystal were confirmed by single crystal X-ray diffraction (SXRD). The powder XRD (PXRD) was carried out to identify the crystalline planes. The nature of bonding and structure of 2H1N was analyzed using 1HNMR and 13CNMR. Functional groups of 2H1N crystal were confirmed by Fourier transform infrared (FTIR) spectral analysis. The optical transmittance was determined by the UV–Vis NIR spectral analysis and the grown crystal has good optical transparency in the visible region (300-900 nm). To analyze the third order nonlinear optical properties, z-scan study was carried out and the nonlinear optical parameters like refractive index (1.30 x 10-7cm2/W), absorption coefficient (0.0410-4cm/W) and the third order nonlinear optical susceptibility (1.90 x 10-6 esu) was determined. The optical limiting behavior and clamping measurements of 2H1N was 37.3 mW and 1.08 mW respectively. The dielectric constant (~12) and low dielectric loss as a function of frequency were measured to ensure the 2H1N has better optical application.
关键词： A2. Vertical Bridgman technique,A1. Crystal structure,B3. Nonlinear optics,B1. organic compounds,B2. Nonlinear optic materials
更新于2025-09-19 17:15:36
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A review of nonlinear applications in silicon optical fibers from telecom wavelengths into the mid-infrared spectral region
摘要： Glass-glad silicon core fibers are attracting considerable attention for use in nonlinear applications due to their tight light confinement and intrinsically high third-order nonlinearities. Recent advances in the fabrication procedures have shown that molten core fiber drawing and post-processing techniques can be combined in a versatile approach to produce low-loss fibers with submicron-sized crystalline cores. In this paper, we review current progress in the nonlinear application of silicon-based optical fibers from telecom wavelengths into the mid-infrared. Particular attention is paid to dispersion engineering the fibers to achieve efficient parametric amplification, wavelength conversion and mid-infrared supercontinuum generation.
关键词： Fiber optics,silicon photonics,supercontinuum generation,fiber nonlinear optics
更新于2025-09-19 17:13:59
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Raman scattering and self-steepening in nonlinear plasmonic waveguide pulse equation
摘要： In this paper, we use Maxwell equations and the first order perturbation theory to obtain pulse propagation equation in a plasmonic waveguide made of nonlinear dielectric material. In this study, the effects of nonlinear self-steepening and Raman scattering are considered. Nonlinear coefficients of phase modulation, Raman and self-steepening are calculated numerically in terms of frequency and compared with a standard silica fiber. Obtained values of the nonlinear coefficients are about up to 300 times larger than that of standard silica optical fibers. So they can be used as part of all optical integrated circuit such as continuum generation, optical switching and frequency conversion.
关键词： Nonlinear optics,Self-steepening,Raman scattering,Nonlinear plasmonic waveguide
更新于2025-09-19 17:13:59
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Optical frequency comb generation with low temperature reactive sputtered silicon nitride waveguides
摘要： Integrated silicon nitride (SiN) waveguides with anomalous dispersion have the potential to bring practical nonlinear optics to mainstream photonic integrated circuits. However, high-stress and high-processing temperatures remain an obstacle to mass adoption. We report low-stress, high-confinement, dispersion-engineered SiN waveguides utilizing low temperature grown reactive sputtered thin-films. We demonstrate a microring resonator with an intrinsic quality factor of 6.6 × 105, which enabled us to generate a native free spectral range spaced frequency comb with an estimated on-chip pump power of 850 mW. Importantly, the peak processing temperature is 400 ○C making this approach fully back-end compatible for hybrid integration with preprocessed CMOS substrates and temperature sensitive photonic platforms such as lithium niobate on insulator.
关键词： reactive sputtering,optical frequency comb,silicon nitride waveguides,photonic integrated circuits,nonlinear optics
更新于2025-09-19 17:13:59
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Rationality Modeling of 3D Scanning Image of Digital Print Laser Based on Block Matching Texture Information Repair
摘要： We experimentally investigate mutual information and generalized mutual information for coherent optical transmission systems. The impact of the assumed channel distribution on the achievable rate is investigated for distributions in up to four dimensions. Single channel and wavelength-division multiplexing (WDM) transmission over transmission links with and without inline dispersion compensation are studied. We show that for conventional WDM systems without inline dispersion compensation, a circularly symmetric complex Gaussian distribution is a good approximation of the channel. For other channels, such as with inline dispersion compensation, this is no longer true and gains in the achievable information rate are obtained by considering more sophisticated four-dimensional (4D) distributions. We also show that for nonlinear channels, gains in the achievable information rate can also be achieved by estimating the mean values of the received constellation in four dimensions. The highest gain for such channels is seen for a 4D correlated Gaussian distribution.
关键词： mutual Information,digital communication,fiber nonlinear optics,optical fiber communication,Channel models
更新于2025-09-19 17:13:59