Research Progress
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A Painting Authentication Method Based on Spatial-Spectral Feature FusionA team led by associate Prof. ZHANG Pengchang and Associate Prof. QIU Shi from the Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, reported a model of utilizing a convolutional neural network to classify the collected images ... Associate Prof. ZHANG Pengchang and Associate Prof. QIU Shi, leading a research team at the Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, have devised a painting authentication method based on hyperspectral imaging. This in...Jun 26, 2024 -
Feature-domain Fourier Ptychographic Microscopy Promotes Low-cost Pathological Screening and AnalysisFourier ptychographic microscopy (FPM) suffers from vignetting artifacts when reconstructing the entire field of view (FOV), and has high requirements for systematic error calibration, which significantly impedes the advancement and applications of FPM in d... Recently, a research team led by Associate Prof. PAN An from Xi’an Institute of Optics and Precision Mechanics (XIOPM) of the Chinese Academy of Sciences (CAS) reported a feature domain-based FPM (termed FD-FPM) computational framework to realize non-block...Jun 19, 2024 -
A new record：2085 nm glass fiber laser output slope efficiency up to 90.4%A low-loss Ho3+-doped fluorotellurite glass fiber was successfully developed and fabricated. The end face of fiber remained undamaged under a ~ 70 W of 981 nm CW laser irradiation. An unsaturated maximum 6.35 W@2085 nm singlemode laser output with a slope e... The widespread applications of lasers operating at wavelengths of approximately 2 μm span across various fields, including medicine, communication, and the environment. Co-affected by the multiphoton absorption effects and residual hydroxyl group absorptio...Jun 07, 2024 -
Novel Innovation in achieving significant enhancement of material optical nonlinearityA high Q-factor Friedrich-Wintergen bound state in the continuum based on epsilon-near-zero materials is proposed and demonstrated for the first time in the large loss indium tin oxide (ITO) film by embedding ITO thin films into metal-dielectric hybrid stru... Nonlinearities have important applications in all-optical signal processing, such as ultrafast laser generation, integrated photonic circuits, biosensing and biomedicine. The long-term goal of nonlinear optics is to dramatically change the refractive index ...Apr 24, 2024 -
Femtosecond Laser Direct Writing in the Core of Chalcogenide FiberChalcogenide glass fiber Bragg gratings was successfully fabricated by femtosecond laser direct writing. The results revel the potential of femtosecond laser direct writing in dielectric glass of high linear and non-linear refractive index. The successful d... Femtosecond lasers have emerged as a versatile and powerful instrument, capable of three-dimensional processing within dielectric materials. Among their applications, they have been employed to precisely inscribe Bragg grating structures in various types of...Mar 25, 2024