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Fiber-Loop ringdown Multi-Function Sensors

Journal of Applied Mathematics and Physics 2014年第12期2卷 1118-1122页

作者： Ke Zhao Bokai Yi Zefeng Wang College of Optoelectronic Science and Engineering National University of Defense Technology Changsha China

We demonstrate a fiber-loop ring down multi-function sensors system, which can be used to measure refractive index and curvature simultaneously. Good agreement has been found between theoretical analyses and experimen... 详细信息

关键词： Fiber-Loop ringdown Multi-Function Sensors Refractive Index Sensors Curvature Sensors

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Testing the first law of black hole mechanics with gravitational waves

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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 76-82页

作者： Chao-Wan-Zhen Wang Jin-Bao Zhu Guo-Qing Huang Fu-Wen Shu Department of Physics Nanchang UniversityNanchang 330031China Center for Relativistic Astrophysics and High Energy Physics Nanchang UniversityNanchang 330031China GCAP-CASPER Physics DepartmentBaylor UniversityWaco 76798-7316USA

The successful observation of gravitational waves has provided humanity with an additional method to explore the universe,particularly black *** this study,we utilize data from LIGO and Virgo gravitational wave observations to test the first law of black hole mechanics,employing two different *** consider the secondary compact object as a perturbation to the primary black hole before the merger,and the remnant black hole as a stationary black hole after the *** the pre-merger and post-merger analysis,our results demonstrate consistency with the first law,with an error level of approximate 25%at a68%credibility level for *** the full inspiral-merger-ringdown analysis,our results show consistency with the first law of black hole mechanics,with an error level of about 6%at a 68%credibility level and 10%at a 95%credibility level for ***,we observe that the higher the mass ratio of the gravitational wave source,the more consistent our results are with the first law of black hole ***,our study sheds light on the nature of compact binary coalescence and their implications for black hole mechanics.

关键词： gravitational waves black hole mechanics data analysis ringdown

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Fiber Optic Sensors and Sensor Networks Using a Time-domain Sensing Scheme

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Optics and Photonics Journal 2013年第2期3卷 236-239页

作者： Chuji Wang Malik Kaya Peeyush Sahay Haifa Alali Robert Reese Department of Electrical and Computer Engineering Mississippi State University Starkville MS-39759 USA Department of Physics & Astronomy Mississippi State University Starkville MS-39759 USA

Fiber loop ringdown (FLRD) has demonstrated to be capable of sensing various quantities, such as chemical species, pressure, refractive index, strain, temperature, etc.;and it has high potential for the development of a sensor network. In the present work, we describe design and development of three different types of FLRD sensors for water, cracks, and temperature sensing in concrete structures. All of the three aforementioned sensors were indigenously developed very recently in our laboratory and their capabilities of detecting the respective quantities were demonstrated. Later, all of the sensors were installed in a test grout cube for real-time monitoring. This work presents the results obtained in the laboratory-based experiments as well as the results from the real-time monitoring process in the test cube.

关键词： Fiber Loop ringdown Structural Health Monitoring Water Crack and Temperature Sensing Sensor Network

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