Article
Engineering, Electrical & Electronic
Brandon Buscaino, Elizabeth Chen, James W. Stewart, Thang Pham, Joseph M. Kahn
Summary: This study explores co-packaged optical interfaces for data center switches, comparing different architectures based on single- or multi-wavelength light sources and coherent or direct detection. The results show that coherent detection architectures support higher switch bandwidths and link budgets, while direct detection architectures are more limited.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Ping Zhao, Magnus Karlsson, Peter A. Andrekson
Summary: Low-noise optical amplifiers like compact, waveguide-based, parametric amplifiers utilizing four-wave mixing process have been pursued. An analytic model for phase-sensitive parametric amplifiers based on nonlinear optical waveguides is presented, considering the impact of linear loss. Si3N4 waveguides show potential for achieving 28 dB gain with a 0.8 dB noise figure, with research focusing on improving performance through cross-section design.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Hui Li, Chen Wen, Changkun Feng, Chen Qing, Dengke Zhang, Lishuang Feng
Summary: A frequency spectrum separation method is proposed to suppress backward-light-related errors in resonant integrated optical gyroscopes (RIOG) and improve detection precision. Through optimal modulation frequencies, the long-term bias stability of RIOG achieves 0.3 degrees/h.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Johannes Buetow, Joerg S. Eismann, Maziyar Milanizadeh, Francesco Morichetti, Andrea Melloni, David A. B. Miller, Peter Banzer
Summary: Photonic integrated circuits, especially those based on reconfigurable Mach-Zehnder interferometer meshes, are crucial in various applications. They enable active processing of light and meet the demands of communication, signal processing, information processing, and sensor applications. This study utilizes a reconfigurable photonic integrated circuit to create a spatially resolving detector for amplitudes and phases of an electromagnetic field distribution, achieved by optically sampling free-space beams and processing the light within the photonic mesh of interferometers. The developed versatile method for calibration and operation works in a wide parameter range, even beyond the design wavelength.
Article
Physics, Multidisciplinary
Oleh Yermakov, Vladimir Lenets, Andrey Sayanskiy, Juan Baena, Enrica Martini, Stanislav Glybovski, Stefano Maci
Summary: This study focuses on the properties of surface waves supported by anisotropic self-complementary metasurfaces, showing their hyperbolic structure and the possibility of switching wave canalization direction with a small frequency shift. It also reveals the inherent polarization degree of freedom in plane waves, opening up numerous opportunities for practical applications.
Article
Optics
Changyi Zhou, Woo-Bin Lee, Song Gao, Hongliang Li, Chul-Soon Park, Duk-Yong Choi, Sang-Shin Lee
Summary: This study successfully constructed a fiber meta-tip (FMT) by tethering an all-dielectric metasurface to an optical fiber, showcasing diverse light manipulation capabilities and potential applications in optical interconnects.
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
Prithvi Gundlapalli, Victor Leong, Jun Rong Ong, Thomas Y. L. Ang, Salih Yanikgonul, Shawn Yohanes Siew, Ching Eng Png, Leonid Krivitsky
Summary: In this study, we demonstrate the monolithic integration of PIN-doped silicon APDs for visible light detection with a silicon nitride photonics circuit via end-fire coupling. Different optimal designs based on desired operating regimes are revealed through an in-depth study of multiple PIN doping profiles. At -49 dBm input power, the APDs show responsivity of 0.25 A/W (0.8 A/W) with reverse bias as low as 0.5 V (5.5 V), and corresponding dark current of <3 pA (50 pA). The APDs also exhibit fast RF response with an optimal 3 dB bandwidth of 11 GHz and gain-bandwidth product of 142 GHz, enabling open eye diagrams at 25 Gbps or above. With CMOS-compatible fabrication, these APDs will enable scalable photonics applications in sensing, communications, and quantum technologies at visible wavelengths.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Yujie Zhang, Guo Liang, Liqin Tang, Denghui Li, Jingyan Zhan, Daohong Song, Trevor Kelly, Huizhong Xu, Zhigang Chen
Summary: This study investigates the nonlinear propagation of optical beams and self-collimating effects in food dye solutions. The research shows that the nonlinearity in such solutions is mainly caused by thermo-optic effects. Additionally, the study demonstrates the potential of using low-cost food dye solutions for optical limiting and switching applications.
OPTICS COMMUNICATIONS
(2023)
Article
Computer Science, Artificial Intelligence
Shuaicheng Liu, Kunming Luo, Nianjin Ye, Chuan Wang, Jue Wang, Bing Zeng
Summary: This paper introduces an occlusion-inpainting framework OIFlow to make full use of occlusion regions for optical flow learning. The proposed approach utilizes a new appearance-flow network and boundary dilated warp to handle occlusions caused by displacement beyond the image border, significantly improving the performance on various benchmark datasets.
IEEE TRANSACTIONS ON IMAGE PROCESSING
(2021)
Article
Optics
Ekaterina S. Yastrebova, Ivan Dolgikh, Konstantin Gilev, Irina V. Vakhrusheva, Elizaveta Liz, Alena L. Litvinenko, Vyacheslav M. Nekrasov, Dmitry Strokotov, Andrei A. Karpenko, Valeri P. Maltsev
Summary: This study introduces a method for discrimination of spherical and non-spherical single particles based on the measurement of the most intensive element S-11 of light-scattering matrix. A shape-sensitive vector-invariant is constructed from the parameters of light-scattering profile for individual spherical particles, serving as a numerical criterion for identifying spherical particles. The vector-invariant has been shown to effectively recognize spherical cells among non-spherical ones both theoretically and experimentally.
OPTICS AND LASER TECHNOLOGY
(2021)
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
Engineering, Electrical & Electronic
Hao Song, Huibin Zhou, Kaiheng Zou, Runzhou Zhang, Kai Pang, Haoqian Song, Xinzhou Su, Amir Minoofar, Nanzhe Hu, Cong Liu, Robert Bock, Brittany Lynn, Shlomo Zach, Moshe Tur, Alan E. Willner
Summary: In this study, a tunable, broadband pixel-array-based integrated receiver was experimentally used for recovering orbital-angular-momentum (OAM) multiplexed channels. The receiver consists of a pixel-array mode converter, four phase controllers, and a pixel-array 4-to-3 coupler, enabling the reception and routing of OAM beams. Experimental results demonstrate the high-quality data transmission capability of the receiver within a broad bandwidth.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
J. R. Freitas, S. Pimenta, J. F. Ribeiro, T. Dong, Z. Yang, J. H. Correia
Summary: This study utilized FEM simulations to optimize PDMS microlens performance in improving the efficiency of MicroLED optrodes, and successfully fabricated a microlens array using microfabrication processes. Experimental characterization confirmed the feasibility of the fabrication process for PDMS microlenses.
Article
Computer Science, Hardware & Architecture
Shaojuan Zhang, Rafael Kraemer, Xuwei Xue, Netsanet Tessema, Henrique Freire Santana, Eduward Tangdiongga, Nicola Calabretta
Summary: Optical wireless data center networks (OW-DCNs) utilize optical wireless technology and optical wired switching technology to eliminate cable complexity and create high bandwidth interconnections. This research proposes an OW-DCN system based on arrayed waveguide grating routers and fast tunable transmitters (T-TXs) that employ photonic integrated circuit multicast switches (PIC-MCSs) for nanosecond-scale fast optical switching, multicast operation, T-TX sharing, and dynamic bandwidth allocation. Experimental results validate its lossless, nanosecond, and multicast switching capabilities, as well as its dynamic bandwidth allocation and optical packet switching capability.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2023)
Article
Chemistry, Multidisciplinary
Hojong Choi, Se-woon Choe, Jaemyung Ryu
Summary: This study introduces a new collimator system that changes the virtual image of the resolution chart from infinity to a short distance to meet the near-field performance requirements of mobile phone camera optics. An equivalent-lens conversion method was designed to address chromatic aberration and field curvature issues caused by moving the focusing lens.
APPLIED SCIENCES-BASEL
(2021)
Article
Infectious Diseases
Collette Allen, Carrie Turner, Sumit Kalsi, David Jamieson, Yuetao Li, Hywel Morgan, J. Mark Sutton
DIAGNOSTIC MICROBIOLOGY AND INFECTIOUS DISEASE
(2020)
Article
Chemistry, Multidisciplinary
Daniel Spencer, Hywel Morgan
Letter
Infectious Diseases
Paul Elkington, Hywel Morgan
JOURNAL OF INFECTION
(2020)
Article
Ecology
Weiyi Tang, Elena Cerdan-Garcia, Hugo Berthelot, Despo Polyviou, Seaver Wang, Alison Baylay, Hannah Whitby, Helene Planquette, Matthew Mowlem, Julie Robidart, Nicolas Cassar
Article
Multidisciplinary Sciences
Felix Geissler, Eric P. Achterberg, Alexander D. Beaton, Mark J. Hopwood, Mario Esposito, Matt C. Mowlem, Douglas P. Connelly, Douglas Wallace
Summary: A spectrophotometric method for quantification of dissolved manganese in coastal and estuarine waters has been adapted for in situ application. The analyser utilizes a submersible microfluidic lab-on-chip device with low power and reagent consumption. Laboratory tests show that the analyser is stable, accurate in determining DMn concentrations, and exhibits clear correlations with key hydrographic parameters in field deployments.
SCIENTIFIC REPORTS
(2021)
Article
Green & Sustainable Science & Technology
Anita Flohr, Allison Schaap, Eric P. Achterberg, Guttorm Alendal, Martin Arundell, Christian Berndt, Jerry Blackford, Christoph Boettner, Sergey M. Borisov, Robin Brown, Jonathan M. Bull, Liam Carter, Baixin Chen, Andrew W. Dale, Dirk de Beer, Marcella Dean, Christian Deusner, Marius Dewar, Jennifer M. Durden, Saskia Elsen, Mario Esposito, Michael Faggetter, Jan P. Fischer, Amine Gana, Jonas Gros, Matthias Haeckel, Rudolf Hanz, Moritz Holtappels, Brett Hosking, Veerle A. I. Huvenne, Rachael H. James, Dirk Koopmans, Elke Kossel, Timothy G. Leighton, Jianghui Li, Anna Lichtschlag, Peter Linke, Socratis Loucaides, Maria Martinez-Cabanas, Juerg M. Matter, Thomas Mesher, Samuel Monk, Matthew Mowlem, Anna Oleynik, Stathys Papadimitriou, David Paxton, Christopher R. Pearce, Kate Peel, Ben Roche, Henry A. Ruhl, Umer Saleem, Carla Sands, Kevin Saw, Mark Schmidt, Stefan Sommer, James A. Strong, Jack Triest, Birgit Ungerboeck, John Walk, Paul White, Steve Widdicombe, Robert Euan Wilson, Hannah Wright, James Wyatt, Douglas Connelly
Summary: Carbon capture and storage (CCS) is a key technology for reducing CO2 emissions in industrial processes, and robust strategies for CO2 leakage detection, quantification, and management are crucial for safe geological CO2 storage. The STEMM-CCS project conducted a controlled CO2 release experiment in the North Sea to mimic unintended CO2 emissions from subsurface storage sites. Various techniques were used to detect, characterize, and quantify gaseous and dissolved CO2 in sediments and seawater.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Limnology
Elizabeth A. Bagshaw, Jemma L. Wadham, Martyn Tranter, Alexander D. Beaton, Jon R. Hawkings, Guillaume Lamarche-Gagnon, Matthew C. Mowlem
Summary: Measuring pH in glacial meltwaters is challenging due to their cold, remote, and low ionic strength nature. ISFET sensors show promise in this application, with Honeywell Durafet and Campbell Scientific Sentron models being evaluated for use. ISFET sensors exhibit excellent tolerance of freeze-thaw, minimal long-term drift, and predictable response to temperature, making them a recommended choice for assessing meltwater pH.
LIMNOLOGY AND OCEANOGRAPHY-METHODS
(2021)
Article
Green & Sustainable Science & Technology
Allison Schaap, Dirk Koopmans, Moritz Holtappels, Marius Dewar, Martin Arundell, Stathys Papadimitriou, Rudolf Hanz, Samuel Monk, Matthew Mowlem, Socratis Loucaides
Summary: A novel approach was presented for detecting and quantifying a subsea release of CO2 from North Sea sediments, simulating a leak from a subsea CO2 reservoir. By combining sensor data with hydrodynamic measurements, the amount of CO2 escaping the sediments was successfully quantified, providing a potential for long-term in situ monitoring of offshore CO2 reservoirs.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Environmental Sciences
Luca Possenti, Matthew P. Humphreys, Dorothee C. E. Bakker, Marcos Cobas-Garcia, Liam Fernand, Gareth A. Lee, Francesco Pallottino, Socratis Loucaides, Matt Charles Mowlem, Jan Kaiser
Summary: This study integrated novel sensor combinations into underwater glider missions to achieve high accuracy and low power consumption, and deployed them for testing. Results showed the potential of using pH sensors on autonomous observing platforms for quantifying interactions between biogeochemical processes and the marine carbonate system.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Antony J. Birchill, A. D. Beaton, Tom Hull, Jan Kaiser, Matt Mowlem, R. Pascal, A. Schaap, Yoana G. Voynova, C. Williams, M. Palmer
Summary: The study presents the first in situ PO43- dataset obtained from an underwater glider equipped with a PO43- Lab-on-Chip analyser in the northern North Sea. The findings reveal spatial variations in phosphate concentrations at different scales, with the variability in the bottom layer attributed to regional circulation and across shelf exchange.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Engineering, Environmental
Tianya Yin, Stathys Papadimitriou, Victoire M. C. Rerolle, Martin Arundell, Christopher L. Cardwell, John Walk, Martin R. Palmer, Sara E. Fowell, Allison Schaap, Matthew C. Mowlem, Socratis Loucaides
Summary: The new autonomous Lab-on-Chip microfluidic pH sensor offers high precision and frequency measurements for deep ocean environments, with accuracy validated across varying environmental conditions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Samuel A. Monk, Allison Schaap, Rudolf Hanz, Sergey M. Borisov, Socratis Loucaides, Martin Arundell, Stathys Papadimitriou, John Walk, Daisy Tong, James Wyatt, Matthew Mowlem
Summary: The study demonstrates the successful use of chemical sensors integrated on an underwater vehicle to locate, map, and estimate flux from a controlled sub-seabed CO2 release. The data gathered from the sensors will assist in planning future plume surveys and ensuring the sensor and vehicle combination can effectively resolve the plume of interest. This has global implications for offshore CCS monitoring efficacy and cost, as well as public and regulatory confidence.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Chemistry, Multidisciplinary
Alexander D. Beaton, Allison M. Schaap, Robin Pascal, Rudolf Hanz, Urska Martincic, Christopher L. Cardwell, Andrew Morris, Geraldine Clinton-Bailey, Kevin Saw, Susan E. Hartman, Matthew C. Mowlem
Summary: A new family of miniaturized lab-on-chip colorimetric analyzers has been developed for in situ nitrate and phosphate measurements in the ocean, suitable for depths up to >4800 m. The analyzers show comparable performance to laboratory-based analyses and offer a new low-cost, high-performance tool for measuring chemistry in hyperbaric environments.
Article
Environmental Sciences
Matt Mowlem, Alexander Beaton, Robin Pascal, Allison Schaap, Socratis Loucaides, Sam Monk, Andrew Morris, Christopher L. Cardwell, Sara E. Fowell, Matthew D. Patey, Patricia Lopez-Garcia
Summary: A new product line utilizing in situ lab on chip technology has been introduced for high accuracy measurements of water chemistry parameters, even in deep sea environments. Commercially available sensors include Nitrate, Nitrite, Phosphate, Silicate, Iron, and pH sensors. The technology is adaptable for a wide range of environmental measurements, particularly for chemical and biological parameters that require reagents.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Biochemical Research Methods
Anna Desalvo, Faith Bateman, Edward James, Hywel Morgan, Tim Elliott
Article
Optics
Hang Dong, Zhixin Sun, Jingyi Li, Yahui Li, Wei Zhang, Guangyong Jin
Summary: This paper calculates thermal stresses and adsorption forces to determine laser cleaning conditions and establishes relevant models. Experimental results show that the removal effect is better with increasing nanosecond pulse delay, with the best effect achieved at 600 milliseconds pulse delay. Based on the findings, the mechanisms of oxide film removal involve thermal stress against adsorption and plasma shock wave breaking the oxide layer.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Junjie Zhang, Wenjun Li, Bingtao Li, Zheng-Da Hu, Jicheng Wang, Feng Zhang, Lei Wang
Summary: A multilayer thin film device structure based on Tamm plasmons is proposed for high-performance near-infrared hot electron photodetectors. By optimizing the device structure parameters, high responsivity detection can be achieved.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hong Huang, Zhiguang Han
Summary: This paper proposes a new ghost imaging reconstruction method using ordered orthogonal Hadamard derived speckle as the illumination speckle series, and introduces the alternating direction multiplier method to improve the imaging performance. The evaluation results show that the method can achieve high-quality reconstructed images under low sampling conditions.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Moritsugu Sakamoto, Yuki Ono, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Masayuki Tanaka, Hiroshi Ono
Summary: The effect of wavelength and polarization of illuminating light in polarization imaging for birefringent objects placed behind a scattering structure was experimentally investigated. The result shows that the spatial distribution of the birefringent object was more clearly visualized in the longer wavelength combined with circularly polarized light illumination. This finding indicates the potential of using polarization imaging with circularly polarized light illumination in the near-infrared range for visualizing birefringent objects with scattering.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Peihui Du, Hongfang Wang, Pengwei Li, Rukeyemuhan Abadula, Hmbat Batelbek, Min Gao
Summary: In this study, we theoretically demonstrate the strong coupling between Tamm plasmons and exciton polaritons in metal Al/DBR-molecular structures, extending the operating wavelength to the deep ultraviolet region. The coupling strength can be effectively manipulated by adjusting the structure parameters, offering potential benefits for the development of new-style optical filters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Priyanka Chaudhary, Akhilesh Kumar Mishra
Summary: We design and numerically investigate the switching dynamics between two outer waveguides in a parity-time (PT)-symmetric adiabatically coupled three waveguides nonlinear directional coupler (NLDC) system. The study shows that the device can provide switching even when the middle waveguide is nonlinear and the outer waveguides are linear. Furthermore, the effect of loss to gain ratio on critical switching power and the impact of launched light power and gain (loss) value on transmitted power are also studied.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Wei Feng, Yongcong Yi, Shuyang Li, Zhi Xiong, Boya Xie, Zhen Zeng
Summary: Traditional imaging techniques are ineffective in achieving clear underwater imaging due to the presence of scattering media. Single-pixel imaging (SPI) system based on Unet++ offers a solution for reconstructing high-quality images in highly turbid water environments.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiaorui Qu, Jufeng Zhao, Haijun Tian, Junjie Zhu, Guangmang Cui
Summary: This paper studies the structural similarity between RGB and spectral images and proposes a non-iterative Images Structure Similarity (ISS) method for fast reconstruction of spectral images. Additionally, the input of the Deep Image Prior (DIP) method is optimized for the first time by using the initial spectral data reconstructed by ISS, leading to an improved starting value for the iteration. The experimental results show that the proposed method can enhance the reconstruction quality in both spectral and spatial resolutions, while significantly reducing the reconstruction time compared to other DIP-based methods.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Donghe Sheng, Zhe Han, Zanyang Qiao, Tianpei Dong, Chenxi Wang, Huiping Tian
Summary: In this study, a distributed multi-parameter sensor based on an etched few-mode multi-core fiber is proposed, allowing simultaneous sensing of temperature, strain, and sample refractive index. By combining space division multiplexing and stimulated Brillouin scattering, the sensor achieves high sensitivity in detecting these parameters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Dehao Chen, Zhenwu Mo, Zehong Liang, Junjie Jiang, Huilin Tang, Yidan Sun, Ziyu Wang, Quanfeng Wei, Yanru Chen, Dongmei Deng
Summary: In this study, a novel family of elliptical Airyprime vortex beams (EAPVBs) is introduced, which inherits the excellent self-focusing properties of the circular Airyprime vortex beam (CAPVB). The asymmetric focusing of EAPVB leads to some novel properties, such as the splitting of high-order optical vortex and the formation of two foci. By taking advantage of these properties, EAPVB is constructed as a tunable optical bottle for particle capture.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiao Ma, Qiongchan Shao, Jian-Jun He
Summary: In this study, an SHS chip based on Su8 waveguide was designed and fabricated. By physically adjusting the metal electrodes and compensating for transmissivity fluctuations, the generation of side ripples was successfully suppressed.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hongbin Zhang, Jiansen Du, Zongtao Chi, Hailin Cong, Bin Wang
Summary: In this paper, a novel type of dual-wavelength confocal metalens is proposed to solve the spatial crosstalk between two wavelengths. The metalens can greatly reduce the spatial crosstalk and achieve high precision and efficiency in confocal imaging. It can also focus light in specific wavelength ranges, making it suitable for imaging, microscopy, and optical fiber communication.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Rui Qiu, Guanmao Zhang, Shaokai Du, Jie Liu, Hongyu Jib, Kaiyun Bi, Bochuan Xing, Guangchao Diao
Summary: Recent research has developed an achromatic metalens that shows potential for replacing traditional lenses. This study focuses on a continuously variable focus height broadband achromatic metalens for long-wavelength infrared applications. By optimizing materials and parameters, chromatic aberration is effectively corrected, making it suitable for high-resolution LWIR imaging and spectroscopy systems.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Marcos Troncoso-Costas, Gaurav Jain, Yiming Li, Mohammed Patel, Lakshmi Narayanan Venkatasubramani, Sean O'Duill, Frank Smyth, Andrew Ellis, Francisco Diaz-Otero, Colm Browning, Liam Barry
Summary: In this work, a fast-switching tuneable laser capable of wide wavelength coverage, low noise and linewidth levels suitable for high-order modulation formats is demonstrated. The laser is characterized to cover a wavelength range of 35 nm in the C-band with nanosecond switching time. It is used to successfully demonstrate 480 Gbit/s 16QAM transmission over 25 km of single-mode fiber for a wavelength range of 19 nm.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Takeshi Moriyasu, Masahiko Tani, Hideaki Kitahara, Takashi Furuya, Jessica Afalla, Toshiro Kohmoto, Daishiro Koide, Hiroki Sato, Mitsutaka Kumakura
Summary: Optical pump-terahertz probe spectroscopy was used to study the photocarrier dynamics and optical characteristics of semiconductor Si. The results showed that the thickness of Si influenced the transmitted terahertz field amplitude and peak delay time, indicating differences in photocarrier dynamics between different Si materials.
OPTICS COMMUNICATIONS
(2024)
