- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Formation and Collision of Multistability-Enabled Composite Dissipative Kerr Solitons
摘要： Multistability in Kerr resonators which are driven by continuous or modulated optical waves gives rise to the superposition of distinct nonlinear states, yielding a unique platform for studying complex soliton dynamics. Here, by pumping a crystalline microresonator with two lasers that are frequency detuned from each other by one or multiple cavity free spectral ranges, we go beyond the traditional bichromatic pumping framework and enter an unexplored multistability regime that allows observing novel dynamics including composite solitons and successive soliton collisions. We generate complex frequency comb patterns, observing the velocity mismatch between the solitons and the dual-pumping-induced lattice traps and showing the synchronization of the repetition rates of constituent distinct solitons under the influence of index-barrier-induced intersoliton repulsion. We also demonstrate soliton collisions and observe transient soliton response with spectral analysis and ultrafast imaging, highlighting the eigenfrequency of dissipative soliton dynamics that coincides the “soliton (S) resonance.” Furthermore, we exploit the higher-order dispersion effect to manipulate the intrinsic group velocity mismatch between distinct solitons and demonstrate reversible switching between the composite soliton state and the soliton collisional state. Our findings bring to light the rich physics of the Kerr multistability and may equally be useful in microcomb-based spectroscopy and metrology.
关键词： Nonlinear Dynamics,Optics,Photonics
更新于2025-09-23 15:19:57
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[IEEE 2019 International Conference on Artificial Intelligence and Advanced Manufacturing (AIAM) - Dublin, Ireland (2019.10.16-2019.10.18)] 2019 International Conference on Artificial Intelligence and Advanced Manufacturing (AIAM) - A Dynamic Real-Time Three-Dimensional Attitude Reconstruction Method Based on Multi-Core Optical Fiber Subtitle as Needed
摘要： We have developed a 5 × 5 mm2 compact silicon-photonic receiver with a 28-nm CMOS transimpedance-amplifier (TIA) chip. The receiver chip was designed using a photonics—electronics convergence design technique for the realization of high-speed and high-efficiency operation because the interfaces of the optical and electrical components greatly influence the receiver characteristics. Optical pins were used to obtain easy optical alignment between the multimode fibers and the germanium photodetectors. An aluminum stripline between the PD and the TIA enhanced the 3-dB bandwidth because its characteristic impedance is greater than the TIA input impedance. Coplanar waveguides (CPWs) on the etched SOI wafer achieved a low insertion loss because the overlap between the electric fields of the CPWs and the silicon layer was reduced. We demonstrated 25-Gb/s error-free operation at both 25 and at 85 °C. The minimum sensitivities and power consumptions of the receivers were ?11.0 dBm and 2.3 mW/Gb/s at 25 °C and ?10.2 dBm and 2.5 mW/Gb/s at 85 °C, respectively. These results show that our receiver can be applied for practical use at high temperatures.
关键词： CMOS transimpedance amplifier,multimode fiber transmission,optoelectronic integrated circuit,optical interconnections,optical receivers,silicon photonics
更新于2025-09-23 15:19:57
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[IEEE 2019 Fifth International Conference on Image Information Processing (ICIIP) - Shimla, India (2019.11.15-2019.11.17)] 2019 Fifth International Conference on Image Information Processing (ICIIP) - NFGS Enabled Face Re-identification for Efficient Surveillance in Low Quality Video
摘要： Integrated photonics is a promising route toward high-performance next-generation ICT and sensing devices. Although fiber-packaging is perhaps the most widely discussed obstacle to low-cost photonic devices, electronic-photonic integration and thermal-stabilization are also significant design considerations that need to be properly managed. Using a state-of-the-art Si-photonic optical-network-unit as a worked example, we illustrate some key challenges and solutions in the field of photonic-packaging. Specifically, we describe a novel solder-reflow bonding process for the face-to-face three-dimensional (3-D) integration of photonic and electronic integrated circuits, discuss current and future multichannel fiber-alignment techniques, and investigate the coefficient-of-performance of the thermo-electric cooler that stabilizes the temperature of the photonic components. The challenge of photonic-packaging is to simultaneously satisfy these electrical, optical, and thermal design requirements on small-footprint devices, while establishing a route to scalable commercial implementation.
关键词： silicon photonics,Integrated optics,photonic packaging,optoelectronics
更新于2025-09-23 15:19:57
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Silicona??Waveguidea??Integrated Higha??Quality Metagrating Supporting Bound State in the Continuum
摘要： The photonic bound state in the continuum (BIC) is a spatially bounded eigen state that can be realized in the form of a supercavity mode with an ultrahigh quality factor. The high-quality supercavity resonance can be supported by photonic crystal slabs, asymmetric metasurfaces, and high-contrast gratings. However, these schemes all suffer from bulky device size and complex experimental setup. Herein, a silicon-waveguide-integrated high-quality metagrating is proposed and demonstrated as a new platform to manipulate the supercavity mode. The shallow-ridge metagrating is directly embedded in the silicon slab waveguide, so the input slab mode can be coupled into the resonant ridge mode, which can be further transformed into the supercavity mode by utilizing the intra-waveguide Fabry–Perot interference. Such an effect has been experimentally verified by the fabricated devices. The metagrating operating near the supercavity regime is also experimentally realized with a high quality factor ≈5200. As an application, such high-quality metagrating is exploited to realize the temperature sensing with a high temperature sensitivity ≈77 pm K?1. The proposed integrated metagrating provides a novel approach to harness the BIC, paving ways for a new class of BIC-based nanophotonic devices with high performance, chip-scale footprint, and long-term stability.
关键词： waveguides,bound state in the continuum,silicon photonics,metagrating
更新于2025-09-23 15:19:57
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Miniaturized Devices for Free Space Quantum Key Distribution; in Your Pocket and in Space
摘要： Single sideband optical modulation can be used in multiple RF photonic link applications. However, single sideband optical modulation is often thought to provide lower RF output power than traditional dual sideband modulation techniques. While true in one specific case, it is not true in all cases. We theoretically and experimentally analyze the RF performance of a photonic link utilizing a Z-cut dual-electrode Mach–Zehnder intensity modulator with a 90° RF hybrid that produces optical single sideband modulation. The single sideband performance is compared to double sideband modulation using the same Mach–Zehnder modulator in either a push–pull configuration using a 180° RF hybrid or a single-arm drive configuration. The optical sideband powers, RF output power and the output intercept power and spur-free dynamic range of the third-order intermodulation nonlinearity are compared both theoretically and experimentally for each of the three cases. The performance of a double sideband modulated link using an X-cut inherently push–pull Mach–Zehnder modulator is also compared theoretically, assuming the same Vπ and insertion loss as the dual-electrode Mach–Zehnder modulator.
关键词： single sideband optical modulation,Mach Zehnder modulator,RF photonics
更新于2025-09-23 15:19:57
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Nonmodal Plasmonics: Controlling the Forced Optical Response of Nanostructures
摘要： The operation of numerous physical systems and devices relies on concentrating their state space around a few carefully engineered eigenstates governing the dynamics. In photonics, these discrete degrees of freedom are typically the resonant modes of a structure. However, whenever a light source drives the structure, a continuum of additional nonmodal states generates its forced response, undermining its underlying physics and hindering control through discretization. Dealing with this nonmodal continuum poses a challenge to the design of nanophotonic systems aiming to combine compact sources and nanostructures into unified functional platforms. Here, we present a route to control forced nanostructures by engineering a discrete set of nonmodal degrees of freedom, originating from joint nanostructure-source antiresonances. We experimentally demonstrate that the forced response of ultrathin gold films is shaped by pairs of resonant-antiresonant plasmons, exhibiting joint creation and annihilation in momentum-energy space. Tuning their excitation, we show that 10 nm films can appear “black”: exhibiting strong spectroangular wideband absorption.
关键词： Nanophysics,Plasmonics,Photonics
更新于2025-09-23 15:19:57
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Integrated Raman Laser: A Review of the Last Two Decades
摘要： Important accomplishments concerning an integrated laser source based on stimulated Raman scattering (SRS) have been achieved in the last two decades in the fields of photonics, microphotonics and nanophotonics. In 2005, the first integrated silicon laser based upon SRS was realized in the nonlinear waveguide. This breakthrough promoted an intense research activity addressed to the realization of integrated Raman sources in photonics microstructures, like microcavities and photonics crystals. In 2012, a giant Raman gain in silicon nanocrystals was measured for the first time. Starting from this impressive result, some promising devices have recently been realized combining nanocrystals and microphotonics structures. Of course, the development of integrated Raman sources has been influenced by the trend of photonics towards the nano-world, which started from the nonlinear waveguide, going through microphotonics structures, and finally coming to nanophotonics. Therefore, in this review, the challenges, achievements and perspectives of an integrated laser source based on SRS in the last two decades are reviewed, side by side with the trend towards nanophotonics. The reported results point out promising perspectives for integrated micro- and/or nano-Raman lasers.
关键词： nonlinear waveguide,lasers,microphotonics,nanophotonics,stimulated Raman scattering,optical microcavity,photonics crystals,nonlinear optics,nanocrystals
更新于2025-09-23 15:19:57
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Observation of edge solitons in photonic graphene
摘要： Edge states emerge in diverse areas of science, offering promising opportunities for the development of future electronic or optoelectronic devices, sound and light propagation control in acoustics and photonics. Previous experiments on edge states in photonics were carried out mostly in linear regimes, but the current belief is that nonlinearity introduces more striking features into physics of edge states, leading to the formation of edge solitons, optical isolation, making possible stable lasing in such states, to name a few. Here we report the observation of edge solitons at the zigzag edge of a reconfigurable photonic graphene lattice created via the effect of electromagnetically induced transparency in an atomic vapor cell with controllable nonlinearity. To obtain edge solitons, Raman gain is introduced to compensate strong absorption experienced by the edge state during propagation. Our observations may open the way for future experimental exploration of topological photonics on this nonlinear, reconfigurable platform.
关键词： topological photonics,nonlinearity,Raman gain,edge solitons,photonic graphene
更新于2025-09-23 15:19:57
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Single-Sideband OFDM Transmission via a Silicon Microring IQ Modulator
摘要： We experimentally demonstrate the generation of a single-sideband orthogonal frequency division multiplexed (OFDM) signal using an on-chip silicon photonics microring-based IQ modulator. Over 18 dB sideband suppression ratio is achieved for the wideband OFDM: 15.7 GHz data band and 2.7 GHz guard band. The 31.4 Gb/s signal was transmitted over 20 km of standard single-mode fiber with a bit error rate below the forward error correction threshold. While single-sideband continuous-wave signals have been produced with such hardware, this is the first demonstration of stable data transmission on the single sideband carrier.
关键词： Silicon Photonics,Single Side-band,OFDM,Microring Modulator
更新于2025-09-23 15:19:57
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Approaching the Yablonovitch limit with free-floating arrays of subwavelength trumpet non-imaging light concentrators driven by extraordinary low transmission
摘要： Metamaterials based on arrays of subwavelength dielectric structures has recently proved a viable research venue towards the realization of various photonic devices. In the current study we introduce a new approach towards efficient light trapping and the broadband absorption of the solar radiation based on silicon surface arrays composed of subwavelength trumpet non-imaging light concentrators (henceforth, trumpet arrays). In geometrical optics, a three-dimensional trumpet non-imaging light concentrator is a hyperboloid of revolution with an ideal light concentration ratio. We use finite-difference time-domain electromagnetic calculations to examine the optical response of an infinite cubic-tiled substrate-less silicon trumpet array under normal illumination. The absorptivity spectra of trumpet arrays are characterized by strong absorption peaks, some of which are just below the Yablonovitch limit. The enhanced light trapping is attributed solely to efficient occupation of the array Mie modes, and we show absorption enhancement at the near infrared that is an order of magnitude higher than that of optimized nanopillar (NP) arrays. We show superior broadband absorption of the solar radiation in trumpet arrays (with unoptimized geometry) compared with that of optimized NP arrays (~26% enhancement). The higher optical absorption in trumpet array is governed by low transmissivity, in contrast with NP array in which the absorption is governed by low reflectivity. Finally, we show that low reflectivity in trumpet arrays is governed by modal excitations at the upper part of the trumpets (which is also supported by the weak dependency of the reflectivity on the array height), whereas the transmissivity is governed by modal excitations at the lower part of the trumpets.
关键词： non-imaging light concentrators,Mie modes,nano-photonics,broadband absorption of solar radiation,light trapping
更新于2025-09-19 17:15:36