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1. 发明申请

US20170108379A1 FIBER GRATING DEMODULATION SYSTEM FOR ENHANCING SPECTRAL RESOLUTION BY FINELY SHIFTING LINEAR ARRAY DETECTOR 有权
公开(公告)号：US20170108379A1
公开(公告)日：2017-04-20
申请号：US15292283
申请日：2016-10-13
申请人： Beijing Information Science & Technology University
发明人： Lianqing ZHU , Wei He , Mingli Dong , Fei Luo , Feng Liu , Xiaoping Lou , Hong Li
IPC分类号： G01J3/18 , G02B6/02 , G02F2/00
CPC分类号： G01J3/1895 , G01J3/0208 , G01J3/28 , G01J3/2803 , G02B6/02076 , G02F2/00
摘要： A fiber grating demodulation system for enhancing spectral resolution by finely adjusting a linear array detector, includes a laser pump source, a wavelength division multiplexer, a fiber Bragg grating, a diaphragm, a slit, a collimating mirror, a light splitting grating, an imaging focus mirror, a linear array detector. The laser pump source, the wavelength division multiplexer, and the fiber Bragg grating are connected in sequence, the wavelength division multiplexer is connected to the diaphragm. Light emitted from the laser pump source is multiplexed by the wavelength division multiplexer and then enters the fiber Bragg grating, and a reflection spectrum of the fiber Bragg grating enters the slit of the fiber grating demodulation system as injected light. After passing through the slit, the injected light is reflected by the collimating mirror, the light splitting grating, the imaging focus mirror in sequence, and is finally converged to the linear array detector.

2. 发明授权

US09574939B1 Fiber grating demodulation system for enhancing spectral resolution by finely adjusting a collimating mirror 有权
标题翻译：光纤光栅解调系统，用于通过精细调整准直镜来增强光谱分辨率
公开(公告)号：US09574939B1
公开(公告)日：2017-02-21
申请号：US15292224
申请日：2016-10-13
申请人： Beijing Information Science & Technology University
发明人： Lianqing Zhu , Wei He , Feng Liu , Fei Luo , Mingli Dong , Xiaoping Lou , Fan Zhang
IPC分类号： G01J3/00 , G01J3/18 , G02F2/00 , G02B26/08 , G02B6/02
CPC分类号： G02B6/02076 , G02B6/2931 , G02B6/29317 , G02B6/2938 , G02B6/29395 , G02B26/0816 , G02B2006/12138 , G02F2/00
摘要： A fiber grating demodulation system for enhancing spectral resolution by finely adjusting a collimating mirror, includes a laser pump source, a wavelength division multiplexer, a fiber Bragg grating, a diaphragm, a slit, a collimating mirror, a light splitting grating, an imaging focus mirror, a linear array detector. The laser pump source, the wavelength division multiplexer, and the fiber Bragg grating are connected in sequence, the wavelength division multiplexer is connected to the diaphragm Light emitted from the laser pump source is multiplexed by the wavelength division multiplexer and then enters the fiber Bragg grating, a reflection spectrum of the fiber Bragg grating enters the slit of the fiber grating demodulation system as injected light. After passing through the slit, the injected light is reflected by the collimating mirror, the light splitting grating, and the imaging focus mirror in sequence, and is finally converged to the linear array detector.
摘要翻译：一种用于通过精细调整准直镜提高光谱分辨率的光纤光栅解调系统，包括激光泵浦源，波分复用器，光纤布拉格光栅，光阑，狭缝，准直镜，光分离光栅，成像焦点镜子，线性阵列检测器。激光泵浦源，波分多路复用器和光纤布拉格光栅依次连接，波分复用器连接到光阑由激光泵浦源发射的光被波分复用器复用，然后进入光纤布拉格光栅光纤布拉格光栅的反射光谱作为注入光进入光纤光栅解调系统的狭缝。经过狭缝后，注入的光被准直镜，分光光栅和成像聚焦镜依次反射，并最终会聚到线性阵列检测器。

3. 发明授权

US09029819B2 Gas detection system using intracavity fiber laser with loop cavity having saturated absorption fiber 有权
标题翻译：气体检测系统采用腔内光纤激光器，具有饱和吸收光纤的环形腔
公开(公告)号：US09029819B2
公开(公告)日：2015-05-12
申请号：US14509604
申请日：2014-10-08
申请人： Beijing Information Science & Technology University
发明人： Lianqing Zhu , Fei Luo , Mingli Dong , Wei He , Yinmin Zhang , Xiaochen Meng , Zhehai Zhou
IPC分类号： G01N21/17 , G01J3/42 , G01N21/61 , G01N33/00 , G01N21/25
CPC分类号： G01N21/39 , G01J3/0218 , G01J3/42 , G01J2003/423 , G01N21/255 , G01N2021/391
摘要： A gas detection system with an inner ring cavity fiber laser using saturated absorption optical fiber is provided. The system comprising a ring fiber laser consisted of a pump source, a wavelength division multiplexer, a first active optical fiber, a first coupler, a fiber Bragg grating and a second coupler connected successively; an optical isolator coupled between said first active optical fiber and said first coupler; a second active grating connected between said fiber Bragg grating and said first coupler; a detection gas chamber connected between said first coupler and said second coupler; a first photoelectric detector for detecting the laser intensity outputted from said ring fiber laser to generate a first light intensity signal; a second photoelectric detector for receiving the intensity measuring beam passing through the detection gas chamber to generate a second light intensity signal; and a feedback control unit.
摘要翻译：提供了一种使用饱和吸收光纤的内环腔光纤激光器的气体检测系统。该系统包括环形光纤激光器，其由泵浦源，波分多路复用器，第一有源光纤，第一耦合器，光纤布拉格光栅和连续连接的第二耦合器组成。耦合在所述第一有源光纤和所述第一耦合器之间的光隔离器; 连接在所述光纤布拉格光栅和所述第一耦合器之间的第二有源光栅; 连接在所述第一耦合器和所述第二耦合器之间的检测气室; 用于检测从所述环形光纤激光器输出的激光强度以产生第一光强度信号的第一光电检测器; 第二光电检测器，用于接收通过检测气室的强度测量光束，以产生第二光强度信号; 和反馈控制单元。

4. 发明申请

US20150020568A1 METHOD FOR MEASURING THE STRAIN OF MATERIAL USING SHORT CAVITY FIBER LASER 有权
标题翻译：使用短纤维激光测量材料应变的方法
公开(公告)号：US20150020568A1
公开(公告)日：2015-01-22
申请号：US14049987
申请日：2013-10-09
申请人： Beijing Information Science & Technology University
发明人： Lianqing Zhu , Fei Luo , Wei He , Mingli Dong , Yinmin Zhang , Yudong Jia
IPC分类号： G01L1/24
CPC分类号： G01L1/242 , G01L1/246
摘要： A method for measuring the strain of material using a short cavity fiber laser, includes steps of: a) arranging the short cavity fiber laser, which laser comprises sequentially coupled laser diode pumping source, a wavelength division multiplexer, a fiber bragg grating, an active fiber and a loop mirror; b) fixing the short cavity fiber laser on the material whose strain will be measured, and matching the stretching direction of the fiber of the short cavity fiber laser with the direction of the strain produced by the material to be measured; c) measuring the drift amount of longitudinal mode output by the short cavity fiber laser; and d) calculating and obtaining the strain of the material to be measured.
摘要翻译：一种使用短腔光纤激光器测量材料应变的方法包括以下步骤：a）布置短腔光纤激光器，该激光器包括顺序耦合的激光二极管泵浦源，波分复用器，光纤布拉格光栅，激活光纤和环形镜; b）将短腔光纤激光器固定在测量应变的材料上，并使短腔光纤激光器的光纤的拉伸方向与被测材料产生的应变方向相匹配; c）测量由短腔光纤激光器输出的纵向模式的漂移量; 和d）计算和获得被测材料的应变。

5. 发明授权

US08928885B1 Gas detection system using semiconductor laser with feedback compensation by gas reference cavity 有权
标题翻译：采用半导体激光器的气体检测系统，采用气体参比腔反馈补偿
公开(公告)号：US08928885B1
公开(公告)日：2015-01-06
申请号：US14503901
申请日：2014-10-01
申请人： Beijing Information Science & Technology University
发明人： Fei Luo , Lianqing Zhu , Mingli Dong , Wei He , Yinmin Zhang
IPC分类号： G01N21/61 , G01N21/27
CPC分类号： G01N21/3504 , G01N2201/06113 , G01N2201/13
摘要： A gas detection system using a semiconductor laser with a reference gas cavity compensation is provided, said system comprising a first light source emitting a first beam of a first wavelength as a detection beam; a second light source emitting a second beam of a second wavelength, which is different from the first wavelength, as a reference beam; a first wavelength division multiplexer connected with said first light source and said second light source; a broadband coupler connected with said first wavelength division multiplexer; a reference gas chamber, which is introduced with reference gas of the same composition as that of the gas to be detected and of a known concentration; a detection gas chamber, which is introduced with the gas to be detected.
摘要翻译：提供了一种使用具有参考气腔补偿的半导体激光器的气体检测系统，所述系统包括发射第一波长的第一光束作为检测光束的第一光源; 发射与第一波长不同的第二波长的第二光束作为参考光束的第二光源; 与所述第一光源和所述第二光源连接的第一波分多路复用器; 与所述第一波分多路复用器连接的宽带耦合器; 参考气体室，其被引入具有与待检测气体相同组成的参考气体并具有已知浓度; 检测气体室，其被引入待检测的气体。

6. 发明授权

US09869588B2 Fiber grating demodulation system for enhancing spectral resolution by finely shifting slit 有权
公开(公告)号：US09869588B2
公开(公告)日：2018-01-16
申请号：US15292313
申请日：2016-10-13
申请人： Beijing Information Science & Technology University
发明人： Lianqing Zhu , Wei He , Feng Liu , Mingli Dong , Xiaoping Lou , Hong Li , Fei Luo
IPC分类号： G01J3/18 , G02B6/02 , G02F2/00 , G02B26/08
CPC分类号： G01J3/1895 , G01J3/0237 , G01J3/04 , G01J3/2803 , G01J2003/064 , G02B6/02076 , G02B26/08 , G02F2/00
摘要： A fiber grating demodulation system for enhancing spectral resolution by finely adjusting a slit, includes a laser pump source, a wavelength division multiplexer, a fiber Bragg grating, a diaphragm, a slit, a collimating mirror, a light splitting grating, an imaging focus mirror, and a linear array detector. The laser pump source, the wavelength division multiplexer, the fiber Bragg grating are connected in sequence, and the wavelength division multiplexer is connected to the diaphragm. Light emitted from the laser pump source is multiplexed by the wavelength division multiplexer and then enters the fiber Bragg grating, a reflection spectrum of the fiber Bragg grating enters the slit of the fiber grating demodulation system as injected light. After passing through the slit, the injected light is reflected by the collimating mirror, the light splitting grating, and the imaging focus mirror in sequence, and is finally converged to the linear array detector.

7. 发明授权

US09683892B2 Fiber grating demodulation system for enhancing spectral resolution by finely rotating imaging focus mirror 有权
公开(公告)号：US09683892B2
公开(公告)日：2017-06-20
申请号：US15292244
申请日：2016-10-13
申请人： Beijing Information Science & Technology University
发明人： Lianqing Zhu , Wei He , Xiaoping Lou , Feng Liu , Mingli Dong , Fei Luo , Wei Zhuang
IPC分类号： G01J3/28 , G01J3/18 , G02F2/00 , G02B26/08 , G02B6/02
CPC分类号： G01J3/1895 , G01J3/0208 , G01J3/027 , G01J3/06 , G01J3/28 , G01J2003/064 , G01J2003/066 , G02B6/02076 , G02B26/0816 , G02F2/00
摘要： A fiber grating demodulation system for enhancing spectral resolution by finely adjusting an imaging focus mirror, includes a laser pump source, a wavelength division multiplexer, a fiber Bragg grating, a diaphragm, a slit, a collimating mirror, a light splitting grating, an imaging focus mirror, a linear array detector. The laser pump source, the wavelength division multiplexer, the fiber Bragg grating are connected in sequence, the wavelength division multiplexer is connected to the diaphragm. Light emitted from the laser pump source is multiplexed by the wavelength division multiplexer and then enters the fiber Bragg grating, a reflection spectrum of the fiber Bragg grating enters the slit of the fiber grating demodulation system as injected light. After passing through the slit, the injected light is reflected by the collimating mirror, the light splitting grating, and the imaging focus mirror in sequence, and is finally converged to the linear array detector.

8. 发明授权

US09016105B2 Method for measuring the strain of material using short cavity fiber laser 有权
标题翻译：使用短腔光纤激光测量材料应变的方法
公开(公告)号：US09016105B2
公开(公告)日：2015-04-28
申请号：US14049987
申请日：2013-10-09
申请人： Beijing Information Science & Technology University
发明人： Lianqing Zhu , Fei Luo , Wei He , Mingli Dong , Yinmin Zhang , Yudong Jia
IPC分类号： G01L1/24
CPC分类号： G01L1/242 , G01L1/246
摘要： A method for measuring the strain of material using a short cavity fiber laser, includes steps of: a) arranging the short cavity fiber laser, which laser comprises sequentially coupled laser diode pumping source, a wavelength division multiplexer, a fiber bragg grating, an active fiber and a loop mirror; b) fixing the short cavity fiber laser on the material whose strain will be measured, and matching the stretching direction of the fiber of the short cavity fiber laser with the direction of the strain produced by the material to be measured; c) measuring the drift amount of longitudinal mode output by the short cavity fiber laser; and d) calculating and obtaining the strain of the material to be measured.
摘要翻译：一种使用短腔光纤激光器测量材料应变的方法包括以下步骤：a）布置短腔光纤激光器，该激光器包括顺序耦合的激光二极管泵浦源，波分复用器，光纤布拉格光栅，激活光纤和环形镜; b）将短腔光纤激光器固定在测量应变的材料上，并使短腔光纤激光器的光纤的拉伸方向与被测材料产生的应变方向相匹配; c）测量由短腔光纤激光器输出的纵向模式的漂移量; 和d）计算和获得被测材料的应变。

9. 发明申请

US20150103350A1 GAS DETECTION SYSTEM USING FIBER LASER WITH ACTIVE FEEDBACK COMPENSATION BY REFERENCE CAVITY 有权
标题翻译：使用具有通过参考孔的有源反馈补偿的光纤激光器的气体检测系统
公开(公告)号：US20150103350A1
公开(公告)日：2015-04-16
申请号：US14503829
申请日：2014-10-01
申请人： Beijing Information Science & Technology University
发明人： Fei Luo , Lianqing Zhu , Mingli Dong , Wei He , Yinmin Zhang
IPC分类号： G01N21/61
CPC分类号： G01N21/3504 , G01N21/359 , G01N2201/06113
摘要： The present invention provides a fiber laser gas detection system using active feedback compensation by a reference cavity, said system comprising: an optical fiber laser consists of a laser diode pump source, a wavelength division multiplexer, an active optical fiber and a fiber Bragg grating connected successively; an optical isolator coupled with said wavelength division multiplexer for blocking a reverse light transmission in said active fiber; a coupler connected with said optical isolator for dividing the laser light after being isolated by the optical isolator into a reference beam, a detecting beam and an intensity measuring beam according a certain ration power. The gas detection system according to the present invention can take advantages of the unique superiority of compact structure and narrow linewidth of the laser output of the fiber laser, and achieve a gas detection method with high sensitive and high precision by feedback controlling.
摘要翻译：本发明提供了一种使用由参考腔进行有源反馈补偿的光纤激光气体检测系统，所述系统包括：光纤激光器由激光二极管泵浦源，波分复用器，有源光纤和光纤布拉格光栅组成依次; 与所述波分复用器耦合的光隔离器，用于阻挡所述有源光纤中的反向光传输; 与所述光隔离器连接的耦合器，用于将由光隔离器隔离的激光分成参考光束，检测光束和根据一定比例光的强度测量光束。根据本发明的气体检测系统可以利用光纤激光器的激光输出的紧凑结构和窄线宽的独特优点，并且通过反馈控制实现具有高灵敏度和高精度的气体检测方法。

10. 发明申请

US20150102240A1 GAS DETECTION SYSTEM USING INTRACAVITY FIBER LASER WITH LOOP CAVITY HAVING SATURATED ABSORPTION FIBER 有权
标题翻译：使用具有饱和吸收纤维的环形孔的入口光纤激光器的气体检测系统
公开(公告)号：US20150102240A1
公开(公告)日：2015-04-16
申请号：US14509604
申请日：2014-10-08
申请人： Beijing Information Science & Technology University
发明人： Lianqing Zhu , Fei Luo , Mingli Dong , Wei He , Yinmin Zhang , Xiaochen Meng , Zhehai Zhou
IPC分类号： G01N21/61 , G01N33/00
CPC分类号： G01N21/39 , G01J3/0218 , G01J3/42 , G01J2003/423 , G01N21/255 , G01N2021/391
摘要： A gas detection system with an inner ring cavity fiber laser using saturated absorption optical fiber is provided. The system comprising a ring fiber laser consisted of a pump source, a wavelength division multiplexer, a first active optical fiber, a first coupler, a fiber Bragg grating and a second coupler connected successively; an optical isolator coupled between said first active optical fiber and said first coupler; a second active grating connected between said fiber Bragg grating and said first coupler; a detection gas chamber connected between said first coupler and said second coupler; a first photoelectric detector for detecting the laser intensity outputted from said ring fiber laser to generate a first light intensity signal; a second photoelectric detector for receiving the intensity measuring beam passing through the detection gas chamber to generate a second light intensity signal; and a feedback control unit.
摘要翻译：提供了一种使用饱和吸收光纤的内环腔光纤激光器的气体检测系统。该系统包括环形光纤激光器，其由泵浦源，波分多路复用器，第一有源光纤，第一耦合器，光纤布拉格光栅和连续连接的第二耦合器组成。耦合在所述第一有源光纤和所述第一耦合器之间的光隔离器; 连接在所述光纤布拉格光栅和所述第一耦合器之间的第二有源光栅; 连接在所述第一耦合器和所述第二耦合器之间的检测气室; 用于检测从所述环形光纤激光器输出的激光强度以产生第一光强度信号的第一光电检测器; 第二光电检测器，用于接收通过检测气室的强度测量光束，以产生第二光强度信号; 和反馈控制单元。

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