Article
Engineering, Electrical & Electronic
Hao Sun, Bruno Taglietti, Yue Wang, Lawrence R. Chen
Summary: Bragg gratings (BGs) are widely used in microwave photonic signal processing and systems due to their customizable amplitude and phase responses. Waveguide BGs (WBGs) are compact and easily integrated with other components to build MWP systems. Subwavelength grating (SWG) waveguides and passive devices in silicon-on-insulator (SOI) have enabled the development of breakthrough devices based on anisotropic metamaterials.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Qiang Zhang, Jun Ji, Qiman Cheng, Yanan Duan, Jiali Zang, Jianyi Yang, Hui Yu, Xianmin Zhang
Summary: In this work, we have demonstrated a complete 2-D photonics-aided phased-array antenna (PAA) receiver with an unprecedented scale of 8 x 8 using highly integrated silicon true-time delay line chips. The prototype incorporates wavelength-division-multiplexing technology to build the crucial optical beamforming network (OBFN) module, reducing the type and amount of silicon binary integrated optical time delay lines. The measured beam scanning range is 90 degrees x 90 degrees with a beampointing step of 1 degree in the frequency range from 2 to 6 GHz. Additionally, the photonics-aided PAA is characterized for sensitivity, RF gain, and dynamic range with the online channelized signal processing module. This work marks a milestone in the development of future microwave photonics-based radar systems.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Rui Cheng, Lukas Chrostowski
Summary: This tutorial discusses the development of Integrated Bragg gratings (IBGs) on the silicon-on-insulator (SOI) platform and their potential applications in optical telecommunications and signal processing. The design methodology for SOI-based IBGs is described, along with examples of advanced optical devices.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Xudong Gao, Zhenzhu Xu, Yupeng Zhu, Chengkun Yang, Shoubao Han, Zongming Duan, Fan Zhang, Jianji Dong
Summary: Due to its advantages such as low propagation loss, wide operation bandwidth, continuous delay tuning, fast tuning speed, and compact footprints, chirped Bragg grating waveguide has great potential in wideband phased array beamforming systems. However, the large group delay error has hindered its practical applications. One of the main factors causing large group delay errors is the nonlinear group delay spectrum. In this study, waveguides with nonlinear gradient widths are adopted to compensate for the nonlinear effect of the grating apodization on the mode effective index, resulting in a linear group delay spectrum and a halved group delay error.
FRONTIERS OF OPTOELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Brian Stern, Haoshuo Chen, Kwangwoong Kim, Nicolas K. Fontaine
Summary: This article demonstrates a silicon photonic Bragg grating that achieves both large dispersion and wide bandwidth. The grating is optimized to address fabrication variations and is used as a dispersive element in a direct-detection phase retrieval receiver. The results show the potential for scalable silicon photonic circuits for optical communication and other applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Physical
Ibrar Jahan Mohammed Aslam, Venkatesha Muniswamy, Lalit Singh, Malathi Sathish, Rajini Honnungar
Summary: In this paper, a silicon grating based highly sensitive nanophotonic device is proposed, which is optimized to enhance sensitivity and operates at a wavelength of 1550 nm. The device shows high sensitivity, narrowband filter characteristics, and compact footprint area, making it suitable for sensing various bio-analytes.
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
Yue Dong, Yu Liu, Yin Xu, Bo Zhang
Summary: This paper introduces a multistage Bragg grating design for a reflection-based TM-pass/TE-stop polarizer. The design increases the working bandwidth of the polarizer and allows for an extended wavelength range without compromising its performance.
Article
Optics
Rui Zhou, Zhiguo Zhang, Zhehao Yan, Tong Zhai, Ziyang Xiao, Luming Li
Summary: A novel monitoring method based on fiber Bragg grating sensor for detecting the ice coating on power transmission lines is proposed and demonstrated in this study. Experimental results show that the predicted values have very small errors compared to the actual values, and this is the first time that only micrometeorological information is used to monitor ice thickness.
Article
Engineering, Electrical & Electronic
Chiranjit Ghosh
Summary: This article proposes a simple and unique scheme of high-sensitive fiber Bragg grating (FBG) interrogation system based on microwave signal measurement utilizing the concept of microwave photonics and nonlinear four-wave mixing (FWM). The FWM process concept is combined with microwave photonics to enhance the sensitivity of the FBG sensor. By utilizing the FWM effect and microwave photonics technique, a high strain sensitivity of 36.52 mu V/mu epsilon (26.67 mu W/mu epsilon) is achieved, compared to the initial sensitivity of 4.9 mu V/mu e (0.48 mu W/mu epsilon) using only microwave photonics technique.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Saket Kaushal, Jose Azana
Summary: This paper provides a detailed analysis of using ultra-compact on-chip discrete spectral phase filters based on waveguide Bragg gratings for managing group-velocity dispersion in broadband waveforms. The study demonstrates the potential for achieving target GVD profiles on high-rate periodic pulsed waveforms and highlights the application possibilities on non-periodic signals.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Claudio Porzi, Manuel Reza, Paolo Ghelfi, Marc Sorel, Antonella Bogoni
Summary: We report a silicon photonics flat-top bandpass microwave photonic filter with large out-of-band power rejection of over 40 dB and tunability of central frequency up to 70 GHz. The RF bandpass transfer function can be widely configured without sacrificing filter performance. The filter integrates a phase modulator and a tunable optical splitter to achieve a high level of functional integration.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Antonio Malacarne, Alessandra Bigongiari, Antonio D'Errico, Antonella Bogoni, Claudio Porzi
Summary: This article presents the performance of a monolithically integrated silicon photonics circuit for RF carrier synthesis. Up to sixfold frequency multiplication of an 18.5 GHz reference clock is achieved with low additional phase noise, and reconfigurable frequency generation is demonstrated by tuning the reference clock and the filter.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Cameron M. Naraine, Jocelyn N. Westwood-Bachman, Cameron Horvath, Mirwais Aktary, Andrew P. Knights, Jens H. Schmid, Pavel Cheben, Jonathan D. B. Bradley
Summary: Subwavelength grating (SWG) metamaterial waveguides and ring resonators on a silicon nitride platform are proposed and demonstrated. The SWG waveguide achieves a large overlap (53%) of the Bloch mode with the top cladding material, showing great potential for evanescent field sensing and light amplification. Fabricated using a commercial rapid turn-around silicon nitride prototyping foundry process, the devices have critical dimensions greater than 100 nm. Experimental characterization reveals excellent internal quality factor (2.11 x 10(5)) and low propagation loss (approximately 1.5 dB cm(-1)) in the C-band, surpassing silicon-based SWG ring resonators. These results demonstrate the promising prospects of SWG metamaterial structures for silicon nitride based photonic integrated circuits.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Zejie Yu, Hongnan Xu, Dajian Liu, Huan Li, Yaocheng Shi, Daoxin Dai
Summary: This paper reviews recent advances in high-performance silicon polarization-handling devices assisted with subwavelength structures. These devices have the characteristics of compact size, high performance, and wide bandwidth. The paper introduces different types of polarization-handling devices and their principles, and discusses the challenges and opportunities of silicon polarization-handling devices.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Civil
S. Alireza Nezamalhosseini, Lawrence R. Chen
Summary: This article presents optimal power allocation policies for multiple-input-multiple-output underwater wireless optical communication systems to minimize bit error rate. The study considers absorption, scattering, and weak turbulence, and shows that MIMO techniques with optimal power allocation outperform other strategies.
IEEE JOURNAL OF OCEANIC ENGINEERING
(2021)
Editorial Material
Engineering, Electrical & Electronic
Lawrence R. Chen, Bill Corcoran, Amy C. Foster, Leif K. Oxenlowe, Chester Shu
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Optics
Yue Wang, Hao Sun, Mostafa Khalil, Wei Dong, Ivana Gasulla, Jose Capmany, Lawrence R. Chen
Summary: We experimentally demonstrate an index-variable OTTDL based on an array of 40 subwavelength grating (SWG) waveguides in silicon-on-insulator, offering potential advantages in terms of compactness and operation versatility for a variety of microwave signal processing applications.
Article
Optics
Hao Sun, Lawrence R. Chen
Summary: Tilting subwave-length grating (SWG) waveguide Bragg gratings (WBGs) demonstrates polarization-dependent tuning of spectral response, causing a blueshift for TE mode while maintaining stability for TM mode. This method provides a novel way to manage polarization and obtain polarization-dependent wavelength selectivity with integrated WBG devices.
Article
Optics
Ling Liu, Xian Jin, Tigang Ning, Lawrence R. Chen, Jose Capmany
Summary: The proposed dual-frequency OEO incorporates a multiband microwave photonic filter, allowing for simultaneous tuning and reconfigurable multi-frequency microwave signals. By adjusting the parameters of optical spectral slicing and sampling, the dual-frequency output can be easily achieved, as well as the switching between single-frequency and dual-frequency output. The multi-passband nature of the MPF opens up possibilities for scaling the scheme for multi-frequency OEO operation in the future.
Article
Engineering, Electrical & Electronic
Yujiao Ding, Yue Wang, Yuchen Yang, Cong Du, Wei Dong
Summary: A microwave photonic filter with an adaptive algorithm is proposed and analyzed, which can effectively extract desired signals from noise and significantly improve the signal-to-noise ratio.
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Hao Sun, Bruno Taglietti, Yue Wang, Lawrence R. Chen
Summary: Bragg gratings (BGs) are widely used in microwave photonic signal processing and systems due to their customizable amplitude and phase responses. Waveguide BGs (WBGs) are compact and easily integrated with other components to build MWP systems. Subwavelength grating (SWG) waveguides and passive devices in silicon-on-insulator (SOI) have enabled the development of breakthrough devices based on anisotropic metamaterials.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Telecommunications
Shayan Zargari, Mehrdad Kolivand, S. Alireza Nezamalhosseini, Bahman Abolhassani, Lawrence R. Chen, Mohammad Hossein Kahaei
Summary: In this paper, the problem of maximizing the sum throughput of K users in a hybrid VLC/RF wireless communication system is studied. Two different downlink scenarios are considered, and the transmission time intervals of a TDMA scheme are optimized to achieve the goal. The effectiveness of the proposed approaches is demonstrated through numerical results.
IEEE TRANSACTIONS ON GREEN COMMUNICATIONS AND NETWORKING
(2022)
