In recent years, semiconductor quantum dots （QDs） have been widely used as photon sources in quantum optics due to their special properties, such as high quantum effi- ciency, narrow and tunable emission spectrum, e...In recent years, semiconductor quantum dots （QDs） have been widely used as photon sources in quantum optics due to their special properties, such as high quantum effi- ciency, narrow and tunable emission spectrum, easy manipulation, and so on. The spontaneous emission of QDs also depends on the surrounding environment.展开更多
Fiber specklegram sensors are widely studied for their high sensitivity and compact design.However,as the number of modes in the fiber increased,the speckle sensitivity heightened along with the correlation diminished...Fiber specklegram sensors are widely studied for their high sensitivity and compact design.However,as the number of modes in the fiber increased,the speckle sensitivity heightened along with the correlation diminished,lowering the sensing performance.In this paper,an innovative method is introduced based on digital aperture filtering(DAF)that adopts physical principle analysis,which reduces the collection aperture by computationally screening out the energy of higher-order modes within the speckle,therefore enhancing the correlation among speckles.Subsequently,a multi-layer convolutional neural network is designed to accurately and efficiently identify the measurands represented from the filtered speckles.By comparing the experimental results of the speckle demodulation method on different multimode fibers in light field direction sensing,the DAF method has shown outstanding performance in sensing accuracy,sensing range,stability,resolution,and generalizability,fully demonstrating its tremendous potential in the advancement of fiber sensing technology.展开更多
基金supported by the National Natural Science Foundation of China(Nos.11374289 and 61590932)the National Key R&D Program(No.2016YFA0301700)+2 种基金the Innovation Funds from the Chinese Academy of Sciences(No.60921091)the Fundamental Research Funds for the Central Universitiesthe Open Fund of the State Key Laboratory on Integrated Optoelectronics(No.IOSKL2015KF12)
文摘In recent years, semiconductor quantum dots （QDs） have been widely used as photon sources in quantum optics due to their special properties, such as high quantum effi- ciency, narrow and tunable emission spectrum, easy manipulation, and so on. The spontaneous emission of QDs also depends on the surrounding environment.
基金supported by the National Natural Science Foundation of China(No.52375549)the Nankai University Eye Institute(Nos.NKYKD202204 and NKYKK202209)+2 种基金the China Postdoctoral Science Foundation(No.2022M721695)the Enterprise R&D Special Project of Tiankai Higher Education Science and Technology Innovation Park(No.23YFZXYC00041)the Fundamental Research Funds for the Central Universities,Nankai University(No.63241331)。
文摘Fiber specklegram sensors are widely studied for their high sensitivity and compact design.However,as the number of modes in the fiber increased,the speckle sensitivity heightened along with the correlation diminished,lowering the sensing performance.In this paper,an innovative method is introduced based on digital aperture filtering(DAF)that adopts physical principle analysis,which reduces the collection aperture by computationally screening out the energy of higher-order modes within the speckle,therefore enhancing the correlation among speckles.Subsequently,a multi-layer convolutional neural network is designed to accurately and efficiently identify the measurands represented from the filtered speckles.By comparing the experimental results of the speckle demodulation method on different multimode fibers in light field direction sensing,the DAF method has shown outstanding performance in sensing accuracy,sensing range,stability,resolution,and generalizability,fully demonstrating its tremendous potential in the advancement of fiber sensing technology.
