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公开(公告)号：US12001052B2
公开(公告)日：2024-06-04
申请号：US17761075
申请日：2020-07-01
发明人： Chongyun Shao , Lili Hu , Chunlei Yu , Meng Wang , Yan Jiao , Lei Zhang , Shikai Wang , Xiaoqing Xu
IPC分类号： G02B6/02 , C03C25/1065 , G02B6/036
CPC分类号： G02B6/02395 , C03C25/1065 , G02B6/036 , C03B2201/34
摘要： A radiation-resistant laser optical fiber preform core rod at least includes one type of activated ion (Yb3+, Er3+) and one or more types of co-doped ion (Al3+, P5+, Ge4+, Ce3+, F−), and —OD group of 16-118 ppm. Irradiation resistance of core rod glass can be effectively improved by sequentially performing pre-treatments, i.e. deuterium loading, pre-irradiation and thermal annealing on a preform core rod. Electron paramagnetic resonance test shows that, under the same radiation condition, the radiation induced color center concentration in a preform core rod treated by the method above is lower than in an untreated core rod by one or more orders of magnitude. The obtained core rod can be used for preparing a radiation-resistant rare earth-doped silica fiber, and has the advantages of high laser slope efficiency, low background loss, being able to be used stably in a vacuum environment for a long time, for example.
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2.发明授权公开(公告)号：US11788829B2
公开(公告)日：2023-10-17
申请号：US17728674
申请日：2022-04-25
发明人： Peng Feng , Zhongliang Li , Xiangzhao Wang , Yang Bu
IPC分类号： G01B9/02 , G01B9/02055
CPC分类号： G01B9/02041 , G01B9/02034 , G01B9/02075 , G01B2290/70
摘要： A simultaneous phase-shift point diffraction interferometer and method for detecting wave aberration. The interferometer comprises an ideal spherical wave generation module, an optical system to be measured, an image plane mask, a polarization phase shift module, a two-dimensional polarization imaging photodetector and a data processing unit. Single photodetector is adopted to realize simultaneous detection of more than three phase shift interference patterns, and has the advantages that environmental interference suppression, a flexible optical path, high measurement accuracy, and calibration of system errors of the interferometer may be realized.
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公开(公告)号：US20220342147A1
公开(公告)日：2022-10-27
申请号：US17761075
申请日：2020-07-01
发明人： Chongyun SHAO , Lili HU , Chunlei YU , Meng WANG , Yan JIAO , Lei ZHANG , Shikai WANG , Xiaoqing XU
IPC分类号： G02B6/02 , G02B6/036 , C03C25/1065
摘要： A radiation-resistant laser optical fiber preform core rod at least includes one type of activated ion (Yb3+, Er3+) and one or more types of co-doped ion (Al3+, P5+, Ge4+, Ce3+, F−), and —OD group of 16-118 ppm. Irradiation resistance of core rod glass can be effectively improved by sequentially performing pre-treatments, i.e. deuterium loading, pre-irradiation and thermal annealing on a preform core rod. Electron paramagnetic resonance test shows that, under the same radiation condition, the radiation induced color center concentration in a preform core rod treated by the method above is lower than in an untreated core rod by one or more orders of magnitude. The obtained core rod can be used for preparing a radiation-resistant rare earth-doped silica fiber, and has the advantages of high laser slope efficiency, low background loss, being able to be used stably in a vacuum environment for a long time, for example.
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公开(公告)号：US20220214499A1
公开(公告)日：2022-07-07
申请号：US17340820
申请日：2021-06-07
发明人： Haibo ZHANG , Menghao WU , Bing HE , Yu LEI , Jun ZHOU , Yunfeng QI , Zhijun YUAN , Ren YE
IPC分类号： G02B6/255
摘要： A device for realizing the splicing of an array fiber and a large-size quartz end cap comprises a carbon dioxide laser, a light splitter, a light beam shaper, a high reflectivity mirror, an image detection module, an array fiber and a carrier thereof, a large-size quartz end cap and a carrier thereof, a stepping motor, a thermodetector, and a computer; a laser beam emitted by the carbon dioxide laser is divided into two light beams through a light splitter, after the two light beams respectively pass through the beam shaper and the high reflectivity mirror, two strip-shaped light spots with uniform power density are integrally formed to heat a splicing face of the large-size quartz end cap, a uniform temperature field of a target splicing area is achieved through indirect heating and heat conduction.
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公开(公告)号：US20220107209A1
公开(公告)日：2022-04-07
申请号：US17420578
申请日：2019-12-30
发明人： Haiwen CAI , Jiajing LIANG , Zhaoyong WANG , Bin LU , Qing YE
IPC分类号： G01D5/353
摘要： A multi-dimensional spatial positioning system and method for disturbance source. The system includes a distributed-optical fiber sensor, a sensing optical fiber, a coordinate system, a disturbance source to be monitored, a first signal group, and a second signal group. The disturbance source is positioned by combining an array signal processing method with the distributed optical fiber sensor, using different laying manners for the sensing optical fiber and a certain number of flexibly selected sensing units distributed a certain distance from each other along a line, and combining with a special signal processing method, thereby realizing a function of being capable of monitoring multi-dimensional spatial position information of the disturbance source in real time in both short and long distances.
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公开(公告)号：US10969274B2
公开(公告)日：2021-04-06
申请号：US16685159
申请日：2019-11-15
发明人： Yunjun Lu , Feng Tang , Xiangzhao Wang
摘要： Method for detecting wavefront aberration for optical imaging system based on grating shearing interferometer, the grating shearing interferometer system comprising a light source and illumination system, an optical imaging system to be tested, a one-dimensional diffraction grating plate, a two-dimensional diffraction grating plate, a two-dimensional photoelectric sensor, and a computing unit. The one-dimensional and two-dimensional diffraction grating plates are respectively placed on the object plane and the image plane of the optical imaging system to be tested. By collecting interferograms with phase-shifting amounts of 0, π/2, π, 3π/2 and N sets of α, π-α, 2π-α (where, N = 2 ( fix ( ceil ( 1 / s ) 2 ) + 1 ) , s is the shear ratio of the grating shearing interferometer system), combined with a certain phase retrieval algorithm, the influence of all high-order diffraction beams on the phase retrieval accuracy is eliminated, and finally the detection accuracy of wavefront aberration for the imaging system to be tested is improved.
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公开(公告)号：US20210086299A1
公开(公告)日：2021-03-25
申请号：US17026096
申请日：2020-09-18
发明人： Yang LIAO , Yan YUE , Xuan WANG , Junchi CHEN , Yujie PENG , Yuxin LENG
IPC分类号： B23K26/16 , B23K26/36 , B23K26/70 , B23K26/38 , B23K26/0622
摘要： Laser ablation processing method for debris-free and efficient removal of materials, using a refrigeration device to condense the water vapor and form a thin frost layer on the materials at temperatures below the freezing point. The residual debris deposits on the frost layer covered on the material during the ablation process, which is easily removed when the frost layer melts. At the same time, the frost layer in the laser irradiation area melts to a liquid layer, which can effectively reduce the deposition of debris on the inner wall of the groove and thus improve the efficiency and quality of laser ablation. The method is applicable to debris-free laser processing on an arbitrary curved surface.
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公开(公告)号：US10201874B2
公开(公告)日：2019-02-12
申请号：US15096066
申请日：2016-04-11
IPC分类号： B23K26/0622 , B23K26/53 , B23K26/06 , B23K26/00 , G02B6/13 , C03C23/00 , G02B6/00 , B23K103/00
摘要： Apparatus and method for realizing tubular optical waveguides in glass by femtosecond laser direct writing. Irradiation in glass with focused femtosecond laser pulses leads to decrease of refractive index in the modified region. Tubular optical waveguides of variable mode areas are fabricated by forming the four sides of the modified regions with slit-shaped femtosecond laser pulses, ensuring single mode waveguide with a mode field dimension compatible with direct coupling to single-mode optical fibers.
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公开(公告)号：US09804502B2
公开(公告)日：2017-10-31
申请号：US14985086
申请日：2015-12-30
发明人： Aijun Zeng , Yunbo Zhang , Mingxing Chen , Ying Wang , Huijie Huang
CPC分类号： G03F7/702 , G02B3/0006 , G02B5/005 , G02B26/0833 , G02B26/105 , G03F7/70075 , G03F7/70116 , G03F7/7025
摘要： An illumination device comprises a laser source, a beam expander, a micromirror array having a first control system, a fast steering mirror having a second control system, a diaphragm array, a microlens array, an illumination lens group, and a reflection mirror sequentially along the propagation direction of the laser beam. The first control system comprises a first computer controlling each micromirror on the micro-mirror array through the micromirror array controller to rotate in two-dimensional directions so expanded beam forms desired intensity patterns on the diaphragm array after reflected by the micromirror array and fast reflection mirror and a micromirror array controller; the second control system comprises a second computer controlling the reflection mirror of the fast steering mirror to rotate through fast steering mirror controller so created intensity pattern moves relative to the diaphragm array and a fast steering mirror controller. Method for using the illumination device is provided.
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公开(公告)号：US20170126990A1
公开(公告)日：2017-05-04
申请号：US15408111
申请日：2017-01-17
发明人： Shensheng HAN , Zhentao LIU , Jianrong WU , Enrong LI , Shiyu TAN , Zhe CHEN
CPC分类号： H04N5/332 , G01J3/0205 , G01J3/0229 , G01J3/0294 , G01J3/18 , G01J3/2803 , G01J3/2823 , G01J2003/2813 , G01J2003/2826 , G02B27/1066 , H04N5/2254 , H04N5/372
摘要： A random grating based compressive sensing wideband hyperspectral imaging system comprising a front imaging component, an optical splitting component, more than two branches, and a computer, with each branch having an exit pupil transformation component and a compressive spectral imaging component. The system is based on compressive sensing theory, makes use of the correlation between spectra, increases compression rate on the spectral dimension, realizes three-dimensional compressive collection of wideband spectral image data, and greatly reduces data collection amount. The system is capable of measuring spectral image information on a wideband spectrum with a single exposure, and may obtain high spatial resolution and high spectral resolution by means of designing the random gratings on the various spitting paths.
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