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  1. 61
  2. 62

    Phase-matched third-harmonic generation in silicon nitride waveguides by Vijayakumar Surendar, Vyas Kaustubh, Espinosa Daniel H. G., Reshef Orad, Song Meiting, Awan Kashif Masud, Choudhary Saumya, Cardenas Jaime, Boyd Robert W., Dolgaleva Ksenia

    Published 2024-05-01
    “…We demonstrate third-harmonic generation in silicon nitride waveguides where a fundamental transverse mode at 1,596 nm is phase-matched to a TM02 mode at 532 nm, confirmed by the far-field image. …”
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    Article
  3. 63

    Second-harmonic generation within a random fiber laser by Yousi Yang, Dan Li, Pei Li, Guohao Fu, Tiancheng Qi, Yijie Zhang, Ping Yan, Mali Gong, Qirong Xiao

    Published 2025-01-01
    “…The conversion needs no pretreatment and the average second-harmonic (SH) power reaches up to 10.06 mW, with a corresponding conversion efficiency greater than 0.04%. …”
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  4. 64

    Comprehensive Analysis of Major Fault-to-Failure Mechanisms in Harmonic Drives by Roberto Guida, Antonio Carlo Bertolino, Andrea De Martin, Massimo Sorli

    Published 2024-11-01
    “…While harmonic drives are crucial for precision and efficiency in robotic manipulators, they are also prone to several failure modes that may affect the overall reliability of a system. …”
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  5. 65

    Creating multibeam interference from two-beam interference with the assistance of harmonics generation by Wu-Zhen Li, Zhi-Yuan Zhou, Li Chen, Yin-Hai Li, Guang-Can Guo, Bao-Sen Shi

    Published 2025-05-01
    “…Here, we propose and experimentally verify a nonlinear optics-based MBI principle with the assistance of cascading and recycling harmonics generation of two-beam interference. By cascading and recycling the harmonics processes, in combining with optical power amplification (OPA) to compensate for power losses arising from limited nonlinear conversion efficiency, a total 16th harmonic is achieved, and the observed interference fringes gradually evolve from a sinusoidal curve to a Lorentz-like curve. …”
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  6. 66

    Broadband flexible rectifier with harmonic suppression network for wireless power transfer by Wenxiong Peng, Chenchen Zhang, Huaiqing Zhang, Jiazheng Yu, Wei Song

    Published 2025-04-01
    “…This paper introduces a broadband flexible rectifier that employs a Class-F harmonic suppression network (HSN), designed for efficient long-distance wireless power transfer in applications such as solar power stations, wireless sensor networks, and unmanned aerial vehicles. …”
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  9. 69

    Terahertz harmonic generation and nonlinear spectroscopy of metamaterial-gated/graphene resonators by Riccardo Degl’Innocenti, Yuezhen Lu, Abdullah M. Zaman, Jack M. Woolley, Nishtha Chopra, Wadood Tadbier, Wladislaw Michailow, Stephan Hofmann, James Lloyd-Hughes

    Published 2025-05-01
    “…The odd and even harmonic features show a positive correlation with carrier concentration, allowing for efficient frequency tuning on top of tunable group delay dispersion. …”
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  10. 70

    Opposition-Based Quantum Bat Algorithm to Eliminate Lower-Order Harmonics of Multilevel Inverters by Jahedul Islam, Sheikh Tanzim Meraj, Ammar Masaoud, Md. Apel Mahmud, Amril Nazir, Muhammad Ashad Kabir, Md. Moinul Hossain, Farhan Mumtaz

    Published 2021-01-01
    “…It has advanced learning ability that can effectively remove lower-order harmonics from the output voltage of MLI. It can eventually increase the quality of the output voltage along with the efficiency of the MLI. …”
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    Article
  11. 71

    Thermal effects due to harmonics on dry-type transformers: Impact of filters and phase angles by Mateus Caruso Costa, Marcio Zamboti Fortes, Guilherme Gonçalves Sotelo, Bruno Wanderley França

    Published 2025-06-01
    “…One notable issue is the generation of harmonic distortions by power electronics converters, which significantly affect the performance and efficiency of power transformers, leading to overheating and related adverse effects. …”
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  12. 72

    A Cost-Effective and High-Efficiency Novel 15-Level Hybrid MLI Topology for Renewable Energy Systems by Murat Karakılıç, Hasan Hataş

    Published 2025-06-01
    “…In tests with inductive loads, the output is near pure sinusoidal waveform. The total harmonic distortion (THD) is measured as 1.41% with a low inductive load of 50Ω + 25mH. …”
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  13. 73

    Broadband Microwave Photonic Sub-Harmonic Downconverter with Phase Shifting Ability by Jinglan Zhang, Erwin Hoi Wing Chan, Xudong Wang, Xinhuan Feng, Bai Guan

    Published 2017-01-01
    “…A microwave photonic signal processor that is capable of simultaneously realizing sub-harmonic frequency down conversion and IF signal phase shifting operation is presented. …”
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  14. 74

    Characterization of the Second Harmonic Generation of Boron Nitride Nanotube Macroscopic Assemblies by Ping Lu, Jingwen Guan, Cyril Hnatovsky, Huimin Ding, Kasthuri De Silva, Liliana Gaburici, Christopher Kingston, Stephen J. Mihailov

    Published 2025-06-01
    “…In this work, second harmonic generation (SHG) was achieved from free-standing bulk BNNT sheets and BNNT coatings on silica substrates. …”
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  15. 75

    Deterministic nanoantenna array design for stable plasmon-enhanced harmonic generation by Jeong Tae-In, Oh Dong Kyo, Kim San, Park Jongkyoon, Kim Yeseul, Mun Jungho, Kim Kyujung, Chew Soo Hoon, Rho Junsuk, Kim Seungchul

    Published 2022-10-01
    “…Plasmonic nanoantennas have been extensively explored to boost nonlinear optical processes due to their capabilities to confine optical fields on the nanoscale. In harmonic generation, nanoantenna array architectures are often employed to increase the number of emitters in order to efficiently enhance the harmonic emission. …”
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  16. 76

    Dual-Band Rectifier Design With High Efficiency Using Simple Dual Band-Stop Network for Wireless Power Transfer by Dang-An Nguyen, Yujin Choi, Chulhun Seo

    Published 2025-01-01
    “…The proposed circuit employs a simple dual band-stop network cascaded by only two transmission lines (TLINs) which can yield open-circuit termination simultaneously for the second harmonics of both two separate frequency bands, enabling an efficient DB power recycling mechanism with minimum insertion loss for power conversion efficiency (PCE) enhancement. …”
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    Harmonics Elimination of Reduced Switch Multilevel Inverter Using Henry Gas Solubility Optimization Algorithm by Murni Nabila Mohd Zawawi, Zainuddin Mat Isa, Baharuddin Ismail, Mohd Hafiz Arshad, Ernie Che Mid, Md Hairul Nizam Talib, Muhammad Fitra Zambak

    Published 2025-06-01
    “…Regarding the reduction of THD, it is crucial to emphasize that all OFs can identify the most effective switching angle to minimize THD and eliminate the fifth harmonic to a level below 0.1%. The findings highlight the potential of HGSO in solving complex optimization challenges within power electronics, offering a novel pathway for advancing modulation strategies in CHB MLIs and contributing to the development of more efficient, reliable, and compact power conversion systems.…”
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  19. 79

    Design and Manufacturing of Harmonic Drive Flexible Gear on the Principle or Converted Engagement Reappearance by Tong Shimao.

    Published 1995-01-01
    “…In this paper the ″Principle of Converted Engagement Reappearance″ is discussed.(1) The realization of generating manufacturing flexible gear under the deformation condition which is equal to that of flexible gear engaged with rigid gear without load;(2) When the wave generator is fixed in the manufacturing system, there is a corresponding relationship between the gear-cuttur and rigid gear; (3) The parameters of harmonic drive gear pair are designed and calculated under the condition of virtual flexible gear: The reference circle of virtual flexible gear is defined as the middle circle of flexible gear,and the pitch circles of harmonic drive gear pair is considered to be equal to this reference circle.The harmonic drive gear pair which are manufactured on the principle of ″Converted Engagement Reappearance″ can conform to the Willis theorem.The manufacturing system based on this principle is efficient and of simple structure.…”
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  20. 80

    Simulation Study of Resonance Characteristics and Harmonic Model forLocomotive-grid System by WANG Guanghui, ZHANG Lijun

    Published 2020-01-01
    “…Based on the harmonic model of locomotives-grid system, resonance characteristics of the system were studied by simulation, some basic conclusions were summarized, and an efficient method to accurately simulate resonance characteristics of locomotive-grid system was proposed. …”
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