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1. 发明申请

US20220342147A1 RADIATION-RESISTANT LASER OPTICAL FIBER PREFORM CORE ROD AND PREPARATION METHOD THEREFOR 有权
公开(公告)号：US20220342147A1
公开(公告)日：2022-10-27
申请号：US17761075
申请日：2020-07-01
申请人： Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences
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.

2. 发明申请

US20220214499A1 DEVICE AND METHOD FOR SPLICING ARRAY OPTICAL FIBER WITH LARGE-SIZE QUARTZ END CAP 有权
公开(公告)号：US20220214499A1
公开(公告)日：2022-07-07
申请号：US17340820
申请日：2021-06-07
申请人： Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
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.

3. 发明申请

US20220107209A1 MULTI-DIMENSIONAL SPATIAL POSITIONING SYSTEM AND METHOD FOR DISTURBANCE SOURCE 有权
公开(公告)号：US20220107209A1
公开(公告)日：2022-04-07
申请号：US17420578
申请日：2019-12-30
申请人： Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences
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.

4. 发明授权

US10969274B2 Method for detecting wavefront aberration for optical imaging system based on grating shearing interferometer 有权
公开(公告)号：US10969274B2
公开(公告)日：2021-04-06
申请号：US16685159
申请日：2019-11-15
申请人： Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
发明人： Yunjun Lu , Feng Tang , Xiangzhao Wang
IPC分类号： G01B9/02 , G01J3/02 , G01J3/10 , G01J3/18
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.

5. 发明申请

US20210086299A1 DEBRIS-FREE LASER ABLATION PROCESSING ASSISTED BY CONDENSED FROST LAYER 有权
公开(公告)号：US20210086299A1
公开(公告)日：2021-03-25
申请号：US17026096
申请日：2020-09-18
申请人： Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
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.

6. 发明授权

US10201874B2 Method and apparatus for realizing tubular optical waveguides in glass by femtosecond laser direct writing 有权
公开(公告)号：US10201874B2
公开(公告)日：2019-02-12
申请号：US15096066
申请日：2016-04-11
申请人： Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
发明人： Ya Cheng , Yang Liao , Wei Chu , Peng Wang , Jia Qi
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.

7. 发明授权

US09804502B2 Illumination device and method for using the same in the projection lithography machine 有权
公开(公告)号：US09804502B2
公开(公告)日：2017-10-31
申请号：US14985086
申请日：2015-12-30
申请人： Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
发明人： Aijun Zeng , Yunbo Zhang , Mingxing Chen , Ying Wang , Huijie Huang
IPC分类号： G03B27/54 , G03F7/20 , G02B5/00 , G02B3/00 , G02B26/08 , G02B26/10
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.

8. 发明申请

US20170126990A1 RANDOM GRATING BASED COMPRESSIVE SENSING WIDEBAND HYPERSPECTRAL IMAGING SYSTEM 审中-公开
公开(公告)号：US20170126990A1
公开(公告)日：2017-05-04
申请号：US15408111
申请日：2017-01-17
申请人： Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
发明人： Shensheng HAN , Zhentao LIU , Jianrong WU , Enrong LI , Shiyu TAN , Zhe CHEN
IPC分类号： H04N5/33 , H04N5/372 , G02B27/10 , H04N5/225 , G01J3/28 , G01J3/18
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.

9. 发明授权

US09559411B2 Method for producing infrared ZnS domes 有权
标题翻译：制造红外ZnS圆顶的方法
公开(公告)号：US09559411B2
公开(公告)日：2017-01-31
申请号：US14949801
申请日：2015-11-23
申请人： Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences
发明人： Xiaojian Mao , Baoyan Chai , Long Zhang , Benxue Jiang , Qiang Yuan , Junxi Xie
IPC分类号： H01Q1/42 , C04B35/645 , C04B35/547
CPC分类号： H01Q1/42 , C04B35/547 , C04B35/645 , C04B35/6455 , C04B2235/446 , C04B2235/5436 , C04B2235/604 , C04B2235/6567 , C04B2235/6581 , C04B2235/94 , C04B2235/9653
摘要： A method for producing infrared ZnS domes comprises forming green body by CIP and sintering by hot pressing. In the present invention, the pressure transfers through inert particles hence distributes uniformly while the shape of the dome is controlled by a lower punch head. The ZnS ceramic domes produced by the method of the present invention are of uniform infrared properties with high yield.
摘要翻译：制造红外ZnS圆顶的方法包括通过CIP形成生坯并通过热压烧结。在本发明中，压力传递通过惰性颗粒因此分布均匀，而圆顶的形状由下冲头控制。通过本发明的方法生产的ZnS陶瓷圆顶具有均匀的红外线性能，产率高。

10. 发明授权

US09488525B2 Method and apparatus for femtosecond laser pulse measurement based on transient-grating effect 有权
标题翻译：基于瞬态光栅效应的飞秒激光脉冲测量方法和装置
公开(公告)号：US09488525B2
公开(公告)日：2016-11-08
申请号：US14466861
申请日：2014-08-22
申请人： Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
发明人： Jun Liu , Fangjia Li , Ruxin Li
IPC分类号： G01J3/28 , G01J3/45 , G01J11/00 , G02B19/00 , G02B27/09 , G01J3/18
CPC分类号： G01J3/45 , G01J3/18 , G01J11/00 , G01J2003/1861 , G01J2003/451 , G02B19/0095 , G02B27/0988
摘要： Apparatuses and method for real-time measuring ultrashort pulse shape and pulse width. Transient-grating effect on a transparent optical medium is used to generate a reference beam. A black plate with four equal-sized holes divides the incoming laser beam into four beams, one of which is attenuated and introduced an appropriate time delay relative to the other three. The four laser beams pass through a concave mirror and are focused onto a nonlinear transparent optical medium. The three beams without attenuation are used to generate a transient-grating light in the transparent medium. The transient-grating light is collinear and overlapped with the fourth attenuated beam. According to the third-order nonlinear effect, the transient-grating light has a broader spectral bandwidth and more smooth spectrum phase with respect to the incident laser. By measuring the spectral interference, the spectrum and spectral phase may be retrieved by spectral interferometry.
摘要翻译：用于实时测量超短脉冲形状和脉冲宽度的装置和方法。使用透明光学介质上的瞬态光栅效应来产生参考光束。具有四个相等尺寸孔的黑色板将入射激光束分成四个光束，其中一个光束被衰减并且相对于其他三个光束引入适当的时间延迟。四个激光束通过凹面镜并聚焦到非线性透明光学介质上。不使用衰减的三个光束用于在透明介质中产生瞬时光栅光。瞬态光栅光线与第四衰减光束共线并重叠。根据三阶非线性效应，瞬态光栅光具有相对于入射激光器的更宽的光谱带宽和更平滑的光谱相位。通过测量光谱干涉，光谱和光谱相位可以通过光谱干涉测量来检索。

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