Article
Engineering, Electrical & Electronic
Xinyi Wang, Gangqiang Zhou, Yuyao Guo, Liangjun Lu, Muhammad Shemyal Nisar, Jianping Chen, Linjie Zhou
Summary: The silicon-based integrated optical sampling chip utilizes WDM and MDM techniques to increase the pulse repetition rate. By employing AWG and multimode waveguides for wavelength and high-order mode multiplexing, the sampling rate is enhanced by 8 times. The sampled pulses are modulated and then separated for low-speed parallel processing.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Xingyuan Xu, Weiwei Han, Mengxi Tan, Yang Sun, Yang Li, Jiayang Wu, Roberto Morandotti, Arnan Mitchell, Kun Xu, David J. Moss
Summary: Optical neural networks (ONNs) based on wavelength-division multiplexing (WDM) techniques offer high bandwidth and analog architecture for enhanced computing power and energy efficiency. Integrated microcombs have been used to implement ONNs, with successful applications such as optical convolution accelerators for human image processing at 11 Tera operations per second. However, challenges and limitations of ONNs still need to be addressed for future applications.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
David Gonzalez-Andrade, Xavier Le Roux, Guy Aubin, Farah Amar, Thi Hao Nhi Nguyen, Paula Nuno Ruano, Thi Thuy Duong Dinh, Dorian Oser, Diego Perez-Galacho, Eric Cassan, Delphine Marris-Morini, Laurent Vivien, Carlos Alonso-Ramos
Summary: On-chip spatial and polarization multiplexing is proposed as an effective strategy to enhance the data transmission capacity of integrated optical transceivers. By manipulating the coupling between guided modes and free-propagating beams, spatial and polarization multiplexing with state-of-the-art performance is achieved. Two-polarization and three-mode multiplexed links are developed using standard silicon-on-insulator technology, demonstrating error-free operation at 40 Gbps with low power penalties. This approach can be applied to future implementation of more complex multiplexing schemes.
LASER & PHOTONICS REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Frank Brueckerhoff-Plueckelmann, Johannes Feldmann, Helge Gehring, Wen Zhou, C. David Wright, Harish Bhaskaran, Wolfram Pernice
Summary: The integration of artificial intelligence systems has led to a significant increase in data generation and processing, requiring compact and energy-efficient hardware. This paper presents an optimized layout for a photonic tensor core (PTC) that performs real-valued matrix vector multiplications at telecommunication wavelengths. The use of phase-change material as an optical attenuator allows for positive-valued multiplications, while a novel symmetric multiplication unit enables the multiplication of arbitrary real factors. The integration of wavelength multiplexers (MUX) and a photonic crossbar array on-chip paves the way for fully integrated systems.
Article
Nanoscience & Nanotechnology
Longfang Ye, Kouxiang Yuan, Chunhui Zhu, Yao Zhang, Yong Zhang, Kunzhong Lai
Summary: This study demonstrates a variety of ultra-compact high-efficiency graphene phase modulators based on metal-nanoribbon integrated hybrid plasmonic waveguides in the near-infrared region. These GPMs show excellent phase modulation performance with low insertion loss, high modulation efficiency, wide modulation bandwidth and low energy consumption, making them promising for high-speed telecommunications and other graphene-based integrated photonics applications.
Article
Engineering, Electrical & Electronic
Shan Wang, Hailin Yang, Yuwen Qin, Di Peng, Songnian Fu
Summary: This study investigates the potential of space division multiplexing (SDM) for power-over-fiber (PWoF) technique, and verifies it through weakly-coupled multicore fiber (WC-MCF) design and experiments. The results show that the SDM-enabled PWoF scheme is superior to the wavelength division multiplexing (WDM) scheme in terms of energy light delivery scalability and wavelength division multiplexing savings.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Jun Chen Ke, Xiangyu Chen, Wankai Tang, Ming Zheng Chen, Lei Zhang, Li Wang, Jun Yan Dai, Jin Yang, Jun Wei Zhang, Lijie Wu, Qiang Cheng, Shi Jin, Tie Jun Cui
Summary: A new-architecture space-frequency-polarization-division multiplexed wireless communication system is proposed using an anisotropic space-time-coding digital metasurface, which can improve the channel capacity and space utilization.
NATIONAL SCIENCE REVIEW
(2022)
Review
Optics
Svetlana Nikolaevna Khonina, Nikolay Lvovich Kazanskiy, Muhammad Ali Butt, Sergei Vladimirovich Karpeev
Summary: This review presents an attention-grabbing and up-to-date overview of major multiplexing techniques, including wavelength division multiplexing, polarization division multiplexing, space division multiplexing, mode division multiplexing, and orbital angular momentum multiplexing. It also discusses hybrid multiplexing methods and techniques. This unique review paper highlights the most prominent and recent progress in multiplexing techniques in one place.
OPTO-ELECTRONIC ADVANCES
(2022)
Article
Engineering, Electrical & Electronic
Francisco Javier Garcia-Gomez, Gerhard Kramer
Summary: A nonlinear perturbation model is employed in this study to analyze the achievable rates of combined space-division multiplexing (SDM) and wavelength-division multiplexing (WDM) in fiber-optic channels. The analysis reveals that the power of nonlinear interference is at most quadratic in the number of SDM channels, while the achievable rates scale at least as the cubic root of the number of channels and linearly with the optimized launch power for large numbers of channels.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Nilanjana Sarkar, Suchismita Banerjee, Paulomi Mandal, Parimal Tudu, Anneswa Chakraborty, Binoy Das, Ardhendu Sekhar Patra
Summary: This paper proposes and demonstrates a system for 10 Gbps/20 GHz wireless transmission and 10 Gbps free space optical communication. The system minimizes dispersion and inter symbol interference effect, and increases the transmission capacity. The experimental results suggest the efficiency and spectral efficiency of the system are high.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Fumi Nakamura, Hideaki Asakura, Keijiro Suzuki, Ken Tanizawa, Minoru Ohtsuka, Nobuyuki Yokoyama, Kazuyuki Matsumaro, Miyoshi Seki, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima, Hiroyuki Tsuda
Summary: A novel 1 x M fold-back type wavelength selective switch (WSS) is designed to have fewer waveguide crossings, reducing excess crosstalk and loss in lightwave circuits. By using a fold-back architecture, the number of crossings can be reduced to less than half of a conventional design, improving performance and scalability. The switching operation of a 200-GHz spacing, 20-channel, 1 x 2 silicon WSS in a fold-back configuration is demonstrated, showing promising results with average insertion loss and extinction ratio.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Chien-Hung Yeh, Wen-Piao Lin, Syu-Yang Jiang, Shang-En Hsieh, Ching-Hsuan Hsu, Chi-Wai Chow
Summary: This study presents a new WDM-PON system to support blended fiber and free space optics (FSO) signal access. The C- and L-band channels are used to provide simultaneous fiber and FSO traffics. Additionally, the proposed WDM access architecture offers a self-restored mechanism to avoid fiber breakpoints in the fiber access traffic.
Article
Optics
Peng Hao, Zhenchuan Wang, X. Steve Yao
Summary: We propose and demonstrate a Lidar beam-forming scheme using wavelength-division-multiplexing (WDM) and time-division-multiplexing (TDM), which eliminates the need for moving parts. The scheme achieves beam formation by demultiplexing lights with different wavelengths into N waveguides (WDM channels) and further switching them into M waveguides (TDM channels) to point in different directions. We have successfully demonstrated the scheme using 4 WDM channels and 1 x 4 optical fiber switches, together with time-of-flight (ToF) technique for distance measurement. This combined TDM and WDM scheme offers an attractive alternative to existing beam scanning methods.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Xin Liu, Shijie Tu, Cuifang Kuang, Xu Liu, Xiang Hao
Summary: In this paper, a novel method based on diffractogram analysis is proposed to calibrate the SLM with high accuracy, without the need for additional optical devices and with higher tolerance to external factors.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Telecommunications
Sushank Chaudhary, Abhishek Sharma, Xuan Tang, Xian Wei, Priya Sood
Summary: This study mainly focuses on the potential of transmitting high-capacity data through FSO links by combining OCDMA and PDM, as well as the performance under different atmospheric fog conditions.
WIRELESS PERSONAL COMMUNICATIONS
(2021)