Article
Engineering, Electrical & Electronic
Ping Zhao, Zhichao Ye, Magnus Karlsson, Victor Torres-Company, Peter A. Andrekson
Summary: This paper reports a low-noise optical phase-sensitive amplifier (PSA) enabled by a single compact integrated silicon nitride photonic waveguide, which allows optical signal processing at different wavelengths. The experimental results show that silicon-nitride-based PSAs are promising for the next generation of broadband optical signal processing and communication systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
David Benedicto, Juan A. Valles, Juan C. Martin
Summary: The output signal intensity distribution of several fs-laser written double-core active waveguides was studied, revealing a correlation between the ratio of cores' output powers and input pump power. A model based on coupled-mode theory was proposed to explain the phenomenon and simulations showed good agreement with experiments when allowing for small differences between cores' parameters.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Shangran Xie, Ran Gao, Yi Jiang
Summary: This study explores the collective dynamics of two nanofibers in a hollow-core fiber and reveals enhanced optical coupling. By tuning the gap between the nanofibers, the optical forces can be switched from attractive to repulsive, which enables versatile functionalities. The findings of this research are significant for nanotechnologies.
COMMUNICATIONS PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Yuning Zhang, Jiayang Wu, Yang Qu, Linnan Jia, Baohua Jia, David J. Moss
Summary: Theoretical study on the Kerr nonlinear optical performance of silicon nanowire waveguides integrated with 2D layered graphene oxide films reveals significant enhancement of Kerr nonlinearity. Optimization of waveguide geometry and GO film thickness can increase the effective nonlinear parameter and FOM. By evaluating the spectral broadening induced by self-phase modulation, the trade-off between enhancing Kerr nonlinearity and minimizing loss is examined.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Yulei Wang, Kai Li, Yu Yu, Sensen Li, Yunfei Li, Wuyue Wang, Changyu Song, Zhiyong Wang, Gong Wang, Yong Zhang, Zhiwei Lu, Yuhai Li, Tongyu Liu, Xiusheng Yan
Summary: This paper proposes a design scheme for SBS lasers based on silicon ring waveguides, which achieve tunable phonon frequencies emission by modifying the ring cavity widths, providing a new technical approach for designing tunable SBS lasers.
FRONTIERS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
David Benedicto, Antonio Dias, Juan Carlos Martin, Juan-Antonio Valles, Javier Solis
Summary: A new methodology for characterizing active multicore waveguides is proposed, suitable for various types of structures. Characterization of two-core and single-core waveguides allows for determination of material properties and refractive index variations. The validity of the characterization method is supported by experimental and simulation results.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Jingcui Song, Xiaojie Guo, Wentao Peng, Jingshun Pan, Lei Wan, Tianhua Feng, Siqing Zeng, Dong Liu, Bin Zhang, Mingjie Zhang, Zhaohui Li
Summary: In this study, experimental characterizations of stimulated Brillouin scattering (SBS) in low-loss GeSbS chalcogenide waveguides were reported. The results demonstrated high Brillouin gain, low linear propagation loss, and negligible nonlinear loss in the GeSbS waveguides, making them very promising for on-chip Brillouin applications. Key parameters such as Brillouin frequency shift, intrinsic Brillouin linewidth, and Brillouin gain coefficient were investigated using a high-resolution pump-probe measurement technique.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Alvaro Rodriguez Echarri, Joel D. Cox, F. Javier Garcia de Abajo
Summary: This study introduces a scheme for generating entangled photon pairs directly in optical waveguides, without the need for bulky optical elements. The scheme utilizes the nonlinearity of the waveguide material and offers high conversion efficiency, making it suitable for efficient and compact quantum optics devices.
Article
Engineering, Electrical & Electronic
Feng Ye, Jiayao Huang, M. S. Aruna Gandhi, Qian Li
Summary: The study demonstrates a method to generate high-repetition-rate ultrashort soliton trains on a chip-scale silicon waveguide, compressing pulse duration and achieving efficient self-similar compression through pulse shaping and compression techniques.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Lars Brusberg, Aramais R. Zakharian, Sukru Ekin Kocabas, Lucas W. Yeary, Jason R. Grenier, Chad C. Terwilliger, Robert A. Bellman
Summary: Co-packaged optics in next-generation datacenters require a novel photonic packaging substrate with high precision optical alignment and electrical connectivity, allowing assembly of multiple components and interconnection with optical fibers. Glass substrate optimization includes optical waveguides, fiber connectors, and chip interfaces, enabling surface mounted flip-chip assembly and precise alignment for photonic components and electrical integrated circuits. Evanescent coupling enables flip-chip assembly of photonic components with low interface loss, while glass waveguides can transmit light with minimal propagation loss.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Yuning Zhang, Jiayang Wu, Yunyi Yang, Yang Qu, Linnan Jia, Houssein El Dirani, Sebastien Kerdiles, Corrado Sciancalepore, Pierre Demongodin, Christian Grillet, Christelle Monat, Baohua Jia, David J. J. Moss
Summary: Enhanced supercontinuum generation is achieved in silicon nitride waveguides by incorporating highly nonlinear graphene oxide films. The films are integrated on-chip using a transfer-free and layer-by-layer coating method. Detailed measurements demonstrate significantly improved spectral broadening, reaching up to 2.4 times improvement in bandwidth compared to devices without graphene oxide.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Isaac Doughan, Kehinde Oyemakinwa, Olli Ovaskainen, Matthieu Roussey
Summary: This article presents a novel low-loss polymer channel hybridized with a titania core, resulting in a nano-waveguide elongated in the normal direction to the substrate. The main purpose is to utilize the quasi-transverse magnetic (TM) mode as the dominant mode in compact photonic circuitry. Detailed design analysis demonstrates that a thin layer of a higher-refractive index material in a trench within the waveguide core can enhance the confinement and reduce the propagation losses. The waveguide is demonstrated at telecom wavelengths with propagation losses as low as 1.75 +/- 0.32 dB/cm in a 200 nm x 900 nm section of the core.
Article
Optics
Ni Chen, Congli Wang, Wolfgang Heidrich
Summary: This paper introduces a joint optimization framework for digital holographic particle tracking velocimetry, which can reconstruct fluid flows and particle volumes faster and more accurately, improving efficiency.
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
Zhizhong Yan, Haoyu He, Han Liu, Meng Iu, Osman Ahmed, Eric Chen, Youichi Akasaka, Tadashi Ikeuchi, Amr S. Helmy
Summary: Parametric gain in a semiconductor Bragg Reflection Waveguide (BRW) chip has been achieved by using chi((2)) nonlinearities. More than 18 dBs of parametric gain for both TE and TM modes can be obtained in a device length of 100 s of micrometers, with polarization insensitivity within the 1550 nm spectrum. These sub-photon per pulse sensitive AlGaAs BRW waveguides open up new possibilities for on-chip quantum information processing using compact, micrometer-scale devices.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Genni Testa, Gianluca Persichetti, Romeo Bernini
Summary: We have presented an optofluidic hybrid silicon-polymer planar ring resonator with integrated microfluidic channels. The low-loss integration of microfluidic channels was achieved by utilizing the interference pattern created by the self-imaging effect. Numerical simulations were conducted to minimize the propagation losses along the ring loop caused by the integration of microfluidic channels. Optical characterization showed that the proposed approach is suitable for microfluidics integration in planar optofluidic design.
Article
Engineering, Electrical & Electronic
Ralf Mouthaan, Peter J. Christopher, Jonathan Pinnell, Michael Frosz, George Gordon, Timothy D. Wilkinson, Tijmen G. Euser
Summary: A general method for exciting discrete modes in waveguides of arbitrary geometry is presented. The method calculates guided modes supported by the waveguide and generates high-efficiency holograms to excite these modes using an optimized Direct Search algorithm. Experimental results on a nodeless antiresonant photonic crystal fibre show high-purity modes and in-coupling efficiencies of up to 32.8%.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Maria N. Romodina, Shangran Xie, Francesco Tani, Philip St J. Russell
Summary: The research on accelerating dielectric microparticles in a photonic crystal fiber with femtosecond pulses shows that, under the influence of material ablation-induced plasma and jet, the particles can be propelled with high acceleration. This effect enables the creation of optical devices at specific locations inside hollow-core photonic crystal fibers.
Article
Optics
Dung-Han Yeh, Wenbin He, Meng Pang, Xin Jiang, Philip St J. Russell
Summary: The study explores the synchronization of mechanical oscillators by optical forces and reports stable long-term synchronization of core vibrations in three different photonic crystal fibers in a high harmonic opto-acoustically mode-locked fiber laser.
Article
Optics
Xinglin Zeng, Wenbin He, Michael H. Frosz, Andreas Geilen, Paul Roth, Gordon K. L. Wong, Philip St J. Russell, Birgit Stiller
Summary: This study reports the experimental investigation of stimulated Brillouin scattering (SBS) in chiral photonic crystal fiber (PCF). The chiral PCF exhibits optical activity and robustly maintains circular polarization states, providing potential for the development of a new generation of stable circularly polarized SBS systems.
PHOTONICS RESEARCH
(2022)
Article
Optics
Ralf Mouthaan, Peter J. Christopher, George S. D. Gordon, Timothy D. Wilkinson, Tijmen G. Euser
Summary: A new method is proposed in this study to correct the phase drift in interferometric measurements using an additional measurement, enabling the construction of complex-valued transmission matrices even in the presence of significant phase drift.
Article
Multidisciplinary Sciences
R. Tyumenev, J. Hammer, N. Y. Joly, P. St J. Russell, D. Novoa
Summary: Preservation of photon statistics is crucial for the implementation of quantum networks. Current methods have limited tunability and suffer from insertion loss and Raman noise. This study introduces a method using hydrogen-filled antiresonant-reflecting photonic crystal fibers for quantum-correlation-preserving frequency conversion.
Article
Multidisciplinary Sciences
Ermanno Miele, Wesley M. Dose, Ilya Manyakin, Michael H. Frosz, Zachary Ruff, Michael F. L. De Volder, Clare P. Grey, Jeremy J. Baumberg, Tijmen G. Euser
Summary: New analytical tools are urgently needed to identify chemical degradation and failure mechanisms in Li-ion batteries. In this study, an operando Raman spectroscopy method based on hollow-core optical fibres was developed to monitor the chemistry of liquid electrolytes during battery cycling. Analysis of spectroscopy measurements revealed changes in electrolyte additives and solvents ratio with respect to cell voltage, indicating the potential to track lithium-ion solvation dynamics.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Ilaria Cristiani, Cosimo Lacava, Georg Rademacher, Benjamin J. Puttnam, Ruben S. Luis, Cristian Antonelli, Antonio Mecozzi, Mark Shtaif, Daniele Cozzolino, Davide Bacco, Leif K. Oxenlowe, Jian Wang, Yongmin Jung, David J. Richardson, Siddharth Ramachandran, Massimiliano Guasoni, Katarzyna Krupa, Denis Kharenko, Alessandro Tonello, Stefan Wabnitz, David B. Phillips, Daniele Faccio, Tijmen G. Euser, Shangran Xie, Philip St J. Russell, Daoxin Dai, Yu Yu, Periklis Petropoulos, Frederic Gardes, Francesca Parmigiani
Summary: Multimode devices and components have garnered significant attention in recent years, opening up new possibilities for designing more complex and sophisticated optical components. By utilizing different modes of propagation, these devices can increase fiber optic capacity, introduce novel intermodal interactions, and allow for complex manipulation of optical modes to cater to various applications.
Article
Chemistry, Physical
Tengfei Li, Arjun Vijeta, Carla Casadevall, Alexander S. Gentleman, Tijmen Euser, Erwin Reisner
Summary: Chemical recycling of synthetic polymers is a promising strategy to deconstruct plastic waste and produce valuable products. In this study, a visible-light-driven reaction was developed to deconstruct polystyrene (PS) into benzoic acid and other aromatic products, and the practicality of this strategy was demonstrated by deconstructing PS foam on a gram scale. The reaction proceeded via a C-H bond oxidation pathway, which was supported by theoretical calculations and experimental results. The study introduces concepts from small-molecule catalysis to polymer deconstruction and provides a promising method to address the global crisis of plastic pollution.
Correction
Optics
P. Roth, Y. Chen, M. C. Gunendi, R. Beravat, N. N. Edavalath, M. H. Frosz, G. Ahmed, G. K. L. Wong, P. St. J. Russell
Summary: Recent work has identified an error in the dispersion relation of helical Bloch modes in a ring of capillaries. The error has been corrected, and a revised version of Fig. 2 is provided.
Article
Optics
Jie Luan, Philip St. J. Russell, David Novoa
Summary: We successfully achieved self-compression of near-UV pulses using numerical modeling of nonlinear pulse dynamics in the fiber. The experimental results demonstrate the significance of this technique for time-resolved studies in spectroscopy, chemistry, and materials science.
PHOTONICS RESEARCH
(2022)
Article
Multidisciplinary Sciences
Xinglin Zeng, Philip St J. Russell, Christian Wolff, Michael H. Frosz, Gordon K. L. Wong, Birgit Stiller
Summary: This study reports a light-driven nonreciprocal isolation system for optical vortex modes based on topology-selective stimulated Brillouin scattering (SBS) in chiral photonic crystal fiber. The experimental results show a vortex isolation of 22 decibels (dB), which is at the state of the art in fundamental mode isolators using SBS. This device may find applications in optical communications, fiber lasers, quantum information processing, and optical tweezers.
Article
Optics
Philip St. J. Russell, Yang Chen
Summary: This paper investigates the localization of light in disordered or periodically structured dielectric media, with a focus on coreless photonic crystal fiber (PCF) drawn in a chiral form. A novel analytical model for twisted coreless PCF is presented, which offers excellent agreement with numerical solutions of Maxwell's equations and significantly reduces computational time. The study reveals the existence of exponentially localized helical Bloch modes (HBMs) in chiral coupled sub-core lattices, opening up new possibilities for 2D localization of light.
LASER & PHOTONICS REVIEWS
(2023)
Article
Physics, Applied
Francesco Tani, Jacob Lampen, Martin Butryn, Michael H. Frosz, Jie Jiang, Martin E. Fermann, Philip St. J. Russell
Summary: We integrate soliton dynamics in gas-filled hollow-core photonic crystal fibers with a cutting-edge fiber laser to create a turnkey system that can generate few-femtosecond pulses at an 8-MHz repetition rate, even at low pump energies. By utilizing soliton self-frequency shift in a second hydrogen-filled hollow-core fiber, we are able to efficiently produce pulses as short as 22 fs, continuously tunable from 1100 to 1474 nm.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Multidisciplinary
L. Genovese, M. Kellermeier, F. Mayet, K. Floettmann, G. K. L. Wong, M. H. Frosz, R. Assmann, P. St. J. Russell, F. Lemery
Summary: Emerging accelerator concepts are using high-frequency electromagnetic radiation to manipulate electron beams, which supports a variety of advanced applications. In this study, we propose a scheme using laser-driven large-core antiresonant optical fibers to manipulate the electron beams. We explore two general cases using different modes and demonstrate the potential for large energy modulations and the production of attosecond microbunches. These findings have wide applicability in high-charge pump-probe experiments, metrology, and accelerator science.
PHYSICAL REVIEW RESEARCH
(2023)
