Article
Optics
Mengxi Tan, Xingyuan Xu, Jiayang Wu, Bill Corcoran, Andreas Boes, Thach G. Nguyen, Sai T. Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, David J. Moss
Summary: Soliton crystal micro-combs are powerful tools for RF signal processing with multiple wavelength channels, offering compact size, multiple wavelengths, high versatility, and wide Nyquist bandwidths. This study demonstrates RF signal processing functions using a soliton crystal micro-comb and compares the results and trade-offs of different comb spacings, tap designs, and shaping methods.
Article
Optics
Rui Tang, Makoto Okano, Kasidit Toprasertpong, Shinichi Takagi, Dirk Englund, Mitsuru Takenaka
Summary: This study proposes a novel photonic integrated circuit (PIC) architecture for accelerated matrix multiplication, addressing the issue of hardware errors increasing with device scale in previous architectures. Additionally, a PIC architecture for general matrix-matrix multiplication (GEMM) is developed to enable high-energy efficiency computing on photonic chips.
Article
Optics
Ying Huang, Hengsong Yue, Wei Ma, Yiyuan Zhang, Yao Xiao, Weiping Wang, Yong Tang, Xiaoyan Hu, He Tang, Tao Chu
Summary: Photonic neural networks (PNNs) have higher computational rates than traditional electronic counterparts, making them highly promising for artificial intelligence applications. A new PNN configuration based on a single-tuned phase shifter and Mach-Zehnder interferometers is proposed, offering significantly lower optical path loss and fewer tunable phase shifters compared to universal matrix mesh. Experimental results demonstrate successful implementation of nonnegative-valued and real-valued matrices, achieving more than 85% inference accuracies in digit recognition tasks. This scalable PNN configuration is crucial for tasks like voice and image recognition that require higher dimensional matrix multiplication.
LASER & PHOTONICS REVIEWS
(2023)
Review
Nanoscience & Nanotechnology
Thomas Ferreira de Lima, Eli A. Doris, Simon Bilodeau, Weipeng Zhang, Aashu Jha, Hsuan-Tung Peng, Eric C. Blow, Chaoran Huang, Alexander N. Tait, Bhavin J. Shastri, Paul R. Prucnal
Summary: This paper introduces neuromorphic photonic processors based on resonator weight banks, which are emerging candidate technology for enabling modern artificial intelligence in high speed analog systems. These purpose-built analog devices leverage the physics of resonator devices to implement vector multiplications, offering efficiency, latency, and throughput advantages over equivalent electronic circuits. However, the challenges of compensation for fabrication variations and environmental disturbances need to be addressed through automated design and control methodologies for practical deployment.
Review
Chemistry, Multidisciplinary
Jingya Xie, Wangcheng Ye, Linjie Zhou, Xuguang Guo, Xiaofei Zang, Lin Chen, Yiming Zhu
Summary: In the past few decades, terahertz (THz) technologies have been greatly enhanced and investigated due to possible opportunities in various applications. Photonics plays a key role in the generation, modulation, and detection of THz waves, while researchers are exploring ways to use silicon photonics for THz applications. Challenges remain in high-quality hybrid silicon lasers, conversion efficiency, device integration, and fabrication for THz integrated systems.
Article
Optics
K. Kinjalk, A. Gilbert, A. Remis, Z. Loghmari, L. Cerutti, G. Patriarche, M. Bahriz, R. Teissier, A. N. Baranov, J. B. Rodriguez, E. Tournie
Summary: Silicon photonics can greatly influence the development of mid-IR photonics by utilizing existing fabrication technologies for microelectronic integrated circuits. Germanium is a promising material for extending the operating wavelength of photonic integrated circuits beyond 8μm. In this study, QCLs based on InAs were directly grown on germanium, demonstrating low threshold current densities.
Article
Optics
Geun Ho Ahn, Alexander D. White, Hyungjin Kim, Naoki Higashitarumizu, Felix M. Mayor, Jason F. Herrmann, Wentao Jiang, Kevin K. S. Multani, Amir H. Safavi-Naeini, Ali Javey, Jelena Vuckovic
Summary: Many attractive photonics platforms lack integrated photodetectors due to material incompatibilities and lack of process scalability. This research shows that tellurium can be evaporated onto photonic chips using a thermal evaporation and deposition technique, resulting in air-stable, high-speed, ultrawide-band photodetectors. These photodetectors demonstrate detection from visible to short-wave infrared, a bandwidth of over 40 GHz, and platform-independent scalable integration with various photonic structures.
Review
Physics, Multidisciplinary
Lorenzo Pavesi
Summary: Silicon Photonics, a technology proposed almost 30 years ago, has gone through several stages of development, from addressing the lack of a silicon laser to exploring novel features of photons in different systems, and then to exploring microring resonators and their applications in integrated photonic circuits, finally leading to the emergence of quantum photonic devices. These developments have brought widespread applications of silicon photonics in sensing, photovoltaics, and optical signal processing.
FRONTIERS IN PHYSICS
(2021)
Article
Optics
Yuhan Yao, Yuhe Zhao, Yanxian Wei, Feng Zhou, Daigao Chen, Yuguang Zhang, Xi Xiao, Ming Li, Jianji Dong, Shaohua Yu, Xinliang Zhang
Summary: This article presents a highly integrated dual-modality microwave frequency identification system on a single chip, which can identify different types of microwave signals and discriminate instantaneous frequency variation among the frequency-modulated signals. This technology can meet the requirements of reduction in size, weight, and power for future advanced microwave photonic processors.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Jacqueline Geler-Kremer, Felix Eltes, Pascal Stark, David Stark, Daniele Caimi, Heinz Siegwart, Bert Jan Offrein, Jean Fompeyrine, Stefan Abel
Summary: Researchers demonstrate a multilevel non-volatile phase shifter memory that is based on the integration of BaTiO3 thin films and silicon waveguides, achieving analogue and non-volatile optical phase tuning. This study adds an analogue non-volatile photonic element to the integrated photonics toolbox, enabling a new generation of power-efficient programmable photonic circuits.
Article
Optics
Thi Thuy Duong Dinh, Xavier Le Roux, Jianhao Zhang, Miguel Montesinos-Ballester, Christian Lafforgue, Daniel Benedikovic, Pavel Cheben, Eric Cassan, Delphine Marris-Morini, Laurent Vivien, Carlos Alonso-Ramos
Summary: Flexible control of modal confinement in silicon photonic waveguides is achieved using a new strategy that utilizes metamaterial engineering of the waveguide core and cladding. The proposed dual-material geometry allows independent control of the index contrast in the vertical and horizontal directions. Experimental results show that the dual-metamaterial waveguides exhibit similar measured quality factors and better calculated bulk sensitivity compared to strip waveguides.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Reza Baghdadi, Michael Gould, Shashank Gupta, Mykhailo Tymchenko, Darius Bunandar, Carl Ramey, Nicholas C. Harris
Summary: The number of photonic system components is increasing rapidly, especially in CMOS-compatible silicon photonics processes. Despite the challenges of implementing large numbers of cascaded active photonic devices, plasma dispersion and the thermo-optic effect in CMOS-compatible silicon processes can address some criteria. With additional back-end-of-line etch processing steps, silicon photonics platforms can support nano-opto-electro-mechanical (NOEM) phase shifters, but achieving NOEM phase shifters that operate at CMOS-compatible voltages and with low insertion loss remains a challenge.
Article
Energy & Fuels
Quan-De Wang, Snehasish Panigrahy, Shiyou Yang, Sergio Martinez, Jinhu Liang, Henry J. Curran
Summary: This communication presents efficient skeletal core combustion mechanisms for small C-0-C-4 fuel molecules using NUIGMech1.1. The skeletal mechanisms have been validated and can be utilized in the development of a five-component skeletal mechanism for real gasoline.
Article
Optics
Tigers Jonuzi, Alessandro Lupo, Miguel C. Soriano, Serge Massar, J. D. Domenech
Summary: Artificial neural networks (ANN) are a groundbreaking technology used in various fields. Photonic implementation of ANN algorithms using frequency multiplexing has advantages of low power consumption and high bandwidth. An integrated programmable spectral filter is designed to manipulate the optical frequency comb in our neuromorphic computing platform.
Article
Optics
Sean Nelan, Andrew Mercante, Cooper Hurley, Shouyuan Shi, Peng Yao, Benjamin Shopp, Dennis W. Prather
Summary: This study reports a hybrid silicon nitride and lithium niobate folded electro-optic Mach Zehnder modulator, which features small footprint, low voltage, and wide bandwidth. The modulator demonstrates promising performance.
Article
Optics
Callum J. Stirling, Wei Cao, Jamie D. Reynolds, Zhibo Qu, Thomas D. Bradley, Lorenzo Mastronardi, Frederic Y. Gardes, Milos Nedeljkovic
Summary: This study demonstrates the experimental validation of endlessly single-mode waveguides in silicon photonics and confirms that only the fundamental mode exists in the waveguides on silicon-on-insulator platforms within the wavelength range of 1.95 μm to 3.80 μm.
Article
Optics
Erica Sanchez, Daniel Perez-Lopez, Diego Perez-Galacho, Tan Huy-ho, David Wessel, Jose Capmany
Summary: We present an end-to-end analytic model for calculating the figures of nerit (FOMs) of arbitrarily filtered and amplified heterodyne coherent microwave photonics (MWP) links. This model is applicable to evaluating the performance of complex systems, particularly in the final stage of radio frequency (RF) signal conversion. We apply this model to a specific case in the 5G link, representing the front-haul segment between the central office and the base station. It is expected to serve as a useful and efficient tool for analyzing various cases combining fiber and photonic chip elements during the design stage.
Article
Chemistry, Analytical
Xingshi Yu, Xia Chen, Milan M. Milosevic, Weihong Shen, Rob Topley, Bigeng Chen, Xingzhao Yan, Wei Cao, David J. Thomson, Shinichi Saito, Anna C. Peacock, Otto L. Muskens, Graham T. Reed
Summary: GER amplifier and annealing process can change the optical properties of silicon, enabling flexible testing and post-fabrication trimming of silicon photonics devices, reducing production costs and increasing yield.
Article
Engineering, Electrical & Electronic
Jose Roberto Rausell Campo, Daniel Perez-Lopez
Summary: This article discusses the implementation of nonlinear activation functions in optical neural networks and compares the response of different electro-optic architectures. The study demonstrates that ring assisted MZI and two-ring assisted MZI have the highest expressivity among the proposed structures. The article also presents a quantitative analysis of the capabilities of optical devices to mimic state-of-the-art activation functions, and benchmarks the obtained activation functions on two machine learning examples.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Optics
Elham Nazemosadat, Sergi Garcia, Ivana Gasulla
Summary: A novel microwave frequency measurement scheme using a heterogeneous multicore fiber is demonstrated. The scheme utilizes the different relative group delays among the cores of the fiber to construct microwave filters with different free spectral ranges, and the ratio of their frequency response traces is used for measurement. By varying the operational wavelength, different measurement curves are obtained, enhancing the accuracy of the measurement.
Review
Chemistry, Analytical
Georgi V. Georgiev, Wei Cao, Weiwei Zhang, Li Ke, David J. Thomson, Graham T. Reed, Milos Nedeljkovic, Goran Z. Mashanovich
Summary: This paper reviews the development of near-IR and mid-IR photonic modulators, including the latest trends in optical and electrical integration, as well as the use of the thermo-optic effect for modulation and the emergence of new platforms.
Article
Engineering, Electrical & Electronic
Sergi Garcia, Mario Urena, Ivana Gasulla
Summary: Multigigabit-per-second photonic-assisted time-interleaved analog-to-digital conversion (ADC) is demonstrated using a dispersion-diversity multicore fiber (MCF) for the first time. The MCF provides tunable true-time delay line operation for the analog signal replicas. By time interleaving 5 digitized channels, continuous real-time ADC tunability with the optical wavelength is achieved, surpassing the sampling rates offered by commercial electronic ADCs. The use of MCFs in photonic-assisted ADCs brings benefits in terms of size, weight, power consumption reduction, system flexibility, and stability improvement, making it relevant for various applications.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Elham Nazemosadat, Jose I. Herranz-Herruzo, Ivana Gasulla
Summary: In this study, we demonstrated, for the first time, the tunable optical beamforming for phased array antennas using a few-mode fiber. The few-mode fiber acted as a continuously tunable true-time delay line, allowing for continuous steering of the beam-pointing angle. This fiber-based beamformer shows potential benefits for next-generation fiber-wireless communications and radar systems in terms of versatility, capacity, size, weight, and power consumption reduction.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Ke Li, David J. Thomson, Shenghao Liu, Weiwei Zhang, Wei Cao, Callum G. Littlejohns, Xingzhao Yan, Martin Ebert, Mehdi Banakar, Dehn Tran, Fanfan Meng, Han Du, Graham T. Reed
Summary: This article reports an integrated transmitter based on complementary metal-oxide-semiconductor/silicon-photonics, which achieves energy-efficient high-speed data transmission by applying switching current to a passive equalization network-guided silicon Mach-Zehnder modulator.
NATURE ELECTRONICS
(2023)
Proceedings Paper
Nanoscience & Nanotechnology
Sergi Garcia, Mario Urena, Elham Nazemosadat, Ivana Gasulla
Summary: This experiment demonstrates the reconfigurable microwave signal processing using dispersion-diversity multicore fiber, and provides several representative applications including signal filtering, radio beam-steering in phased array antennas, frequency measurement, and arbitrary waveform generation.
2023 IEEE PHOTONICS SOCIETY SUMMER TOPICALS MEETING SERIES, SUM
(2023)
Proceedings Paper
Nanoscience & Nanotechnology
Sergi Garcia, Mario Urena, Ivana Gasulla
Summary: In this study, we propose and experimentally demonstrate photonic temporal differentiation and integration on a customized dispersion-diversity 7-core heterogeneous multicore fiber for the first time. We successfully demonstrate up to 4th-order temporal differentiation and 7-sample temporal integration.
2023 IEEE PHOTONICS SOCIETY SUMMER TOPICALS MEETING SERIES, SUM
(2023)
Proceedings Paper
Optics
Elham Nazemosadat, Ivana Gasulla
Summary: In this study, we demonstrate for the first time the reconfigurable radiofrequency signal processing in a few-mode fiber link, utilizing the modes of the double-clad step-index few-mode fiber to create a tunable 2D sampled true-time delay line.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Article
Engineering, Electrical & Electronic
Elham Nazemosadat, Ivana Gasulla
Summary: In this study, we experimentally demonstrate tunable true-time delay line operation over a few-mode fiber link for the first time. The performance of this true-time delay line when applied to microwave signal filtering is also assessed.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Erica Sanchez, Aitor Lopez, Daniel Perez-Lopez
Summary: Multipurpose programmable photonic processors based on two-dimensional waveguide meshes have emerged as a cost-effective and general-purpose solution for various photonic applications. However, design trade-offs and parasitic effects present challenges. To reduce development costs and accelerate circuit design, this work proposes and compares two simulation tools for predicting spectral response, providing fundamental tools for the development of programmable photonic libraries.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Proceedings Paper
Optics
Goran Z. Mashanovich, Lauren Reid, Georgi Georgiev, Chen Wei, Yanli Qi, Callum J. Stirling, Ahmed Osman, Yangbo Wu, Zhibo Qu, Jon Heffernan, Kristian M. Groom, Vinita Mittal, Wei Cao, Li Ke, David J. Thomson, Colin J. Mitchell, Milos Nedeljkovic
Summary: In this paper, we review our recent achievements in modulators and detectors for the 2 μm range, which could be highly relevant in future communications. We showcase Mach-Zehnder and Michelson based modulators operating at data rates of up to 25 Gb/s and Ge based detectors operating at speeds up to 12.5 Gb/s. Additionally, we present the development of broadband waveguides, splitters, and a mid-infrared sensor for sensing applications related to longer wavelengths.
INTEGRATED OPTICS: DEVICES, MATERIALS, AND TECHNOLOGIES XXVI
(2022)
