Article
Engineering, Electrical & Electronic
Mohab N. Hammad, Prajwal D. Lakshmijayasimha, Aleksandra Kaszubowska-Anandarajah, Prince M. Anandarajah
Summary: The authors present a complete characterization of two cost-effective photonically integrated slotted lasers that offer regrowth-free manufacturing, as well as investigate their application as multi-carrier transmitters. The devices utilize gain switching and optical frequency comb generation techniques based on direct modulation, demonstrating their potential for enhancement of modulation bandwidth and generation of a broader OFC.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2021)
Article
Optics
Zitong Feng, Giuseppe Marra, Xi Zhang, Eric R. Numkam Fokoua, Hesham Sakr, John R. Hayes, Francesco Poletti, David J. Richardson, Radan Slavik
Summary: Distributed optical frequency combs suffer from limitations of standard single mode fiber, but the use of hollow core fiber can improve performance and achieve longer transmission distances.
LASER & PHOTONICS REVIEWS
(2022)
Article
Engineering, Electrical & Electronic
Ziqiang Yin, Wen Jiang, Xiangpeng Zhang, Wangzhe Li
Summary: We propose and demonstrate a frequency-agile coherent multiple bands generator based on an asymmetrically-coupled optoelectronic dual-loop framework with recirculating frequency-shifting. The generator achieves repetitive frequency-shifting in the optical- and the electric-domains by converting two seed signals into different frequency-shifted signals and replacing the original seed signals through feedback modulation. By coupling the two loops through recirculating frequency-shifting, a carrier-frequency agile multiple bands signal is obtained. The method shows advantages in anti-interference and high-resolution imaging in microwave experiments under complex electromagnetic interference (EMI).
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Moon Jong Han, Minkyu Kim, Vladimir V. Tsukruk
Summary: In this paper, photonic bio-organic multiphase structures are proposed for integrated thin-film electronic nets with multilevel logic elements for multilevel computing. The adaptive logic elements are capable of triggering tailored quantized electrical output signals under light with different photon energy and at different photonic bandgaps. This proof-of-concept bio-assisted multivalued logic structure facilitates an optical computing system for low-power optical information processing integrated with human-machine interfaces.
Article
Engineering, Electrical & Electronic
Haipeng Zhang, Mu Xu, Junwen Zhang, Zhensheng Jia, Luis Alberto Campos, Curtis Knittle
Summary: A novel point-to-point coherent optical link based on optical frequency comb and injection-locking optical process has been proposed, enabling full-duplex transmission over fiber links up to 100 km. Experimental results show successful full-duplex operation using QPSK up to 100 km with penalty at HD-FEC and SD-FEC thresholds, and using 16QAM up to 80 km with penalties observed at the FEC thresholds.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Hendrik Boerma, Felix Ganzer, Patrick Runge, Martin Schell, Edgar Fernandes, Benjamin Rudin, Florian Emaury
Summary: A microwave photonic RF comb generator is developed by combining an fs-pulse laser and a high-speed broadband photodetector module. The generated pulses have a FWHM of 5.8 ps and a flat RF comb up to 140 GHz. The capability of pulse distribution over fiber is also investigated, and the dispersion of the single mode fiber is managed using an optical bandpass filter.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Haipeng Zhang, Mu Xu, Zhensheng Jia, Luis Alberto Campos
Summary: This article proposes a novel network protection scheme that achieves mutual protection between adjacent P2MP coherent networks without complex switching or redundant devices. High system availability and fast service restoration are achieved by using coherent transceivers with remotely delivered optical carriers that are injection locked to an optical frequency comb. The functionality and performance of the system have been verified experimentally, and the mutual protection design has also been verified using commercially available coherent optics. The full-duplex design that features simultaneous bidirectional transmission using the same wavelength has also been tested in the coherent P2MP system.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Zhenmin Chen, Xin Tu, Maolin Dai, Qian Li, H. Y. Fu
Summary: In this work, we conducted a theoretical investigation on the dispersion relationship of microsphere cavities based on the theory of microcavity dispersion. The results revealed that the size of the microcavity corresponding to the zero dispersion point of the higher order mode is larger than that of the lower order mode at a certain wavelength. By utilizing mode coupling, we successfully achieved optical frequency comb in microsphere cavities with a diameter as small as 105 micrometers, with total dispersions in the normal dispersion region.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Weicheng Chen, Rongxiang Guo, Dian Wan, Tarun Sharma, Lin Zhang, Tiegen Liu, Zhenzhou Cheng
Summary: On-chip Kerr frequency combs provide unprecedented opportunities for optical communications and optical interconnects with compact, low-cost, and high-density wavelength-division multiplexing (WDM) techniques. A dual-mode Kerr frequency comb based on a graphene-on-silicon (GOS) microring is proposed to overcome the limitation of traditional approaches and achieve high-speed optical communications.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Aritra Paul, Arunabh Deka, Tanooja Mishra, Pradeep Kumar Krishnamurthy
Summary: This paper demonstrates an experimental study on a low-power, broadband, and narrow linewidth SBS-FWM OFC with tunable line spacing of 50 to 600 GHz. The linewidth of the comb lines is reduced to below 20 kHz using the optical Vernier effect. The OFC is utilized to investigate the performance of binary and 4-PAM transmission at different data rates.
IEEE PHOTONICS JOURNAL
(2023)
Article
Optics
C. N. Alexeyev, E. Barshak, B. P. Lapin, M. A. Yavorsky
Summary: This study investigates the propagation of optical vortices in coupled parity-time symmetric multimode fibers with equal gain and loss. The system is found to have two second-order exceptional points where the degenerate modes are odd and even Laguerre-Gaussian modes. The research examines the evolution of an arbitrary incoming superposition of Laguerre-Gaussian modes and demonstrates that a black hole state is formed on the orbital Poincare sphere beyond the lowest exceptional point.
Article
Optics
Zhi-Hong Jiao, Jia-Hui Song, Sheng Zhang, Xiao-Yong Li, Guo-Li Wang, Song-Feng Zhao
Summary: In this paper, we theoretically propose a method to control the waveform of terahertz (THz) radiations generated from homogeneous and rippled plasma within an inhomogeneous external electrostatic field. Particle-in-cell (PIC) simulations are used to demonstrate the generation and controllability of three types of THz pulses: single frequency THz pulse in homogeneous plasma, broadband THz pulse, and dual frequency THz pulse in rippled plasma. The parameters of the pulses can be adjusted by manipulating the electron density of the plasma, allowing for tunable THz pulses with different characteristics.
Article
Engineering, Electrical & Electronic
Maria Morant, Luis Gonzalez-Guerrero, Cyril C. Renaud, Roberto Llorente
Summary: This paper introduces and demonstrates a photonic THz generation technique utilizing an optical frequency comb and multicore fiber transmission, showing the feasibility and advantages of remote generation and simplified digital signal processing. The performance of the proposed technique is evaluated experimentally, highlighting the benefits of using comb generation to reduce frequency offset fluctuation and simplify DSP.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Yamei Zhang, Ce Liu, Yu Zhang, Kunlin Shao, Cong Ma, Lu Li, Lijun Sun, Simin Li, Shilong Pan
Summary: A photonic-assisted multi-functional radar waveform generator has been proposed and experimentally demonstrated for single-chirped, counter-chirped, and dual-band linear frequency-modulated (LFM) microwave waveforms generation. By adjusting the time length and bandwidth of the rectangular LFM pulse, it is possible to generate single-chirped, counter-chirped or dual-band LFM signals.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Yoon-Soo Jang, Jungjae Park, Jonghan Jin
Summary: This paper proposes and implements a broadband electro-optic frequency comb for spectral domain interferometry (SDI), enabling sub-100 nm absolute distance measurements with high repeatability. The electro-optic frequency comb has a wide spectral range and can open up new possibilities for SDIs.
PHOTONICS RESEARCH
(2023)
