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1. 发明授权

US09025163B2 Chirp modulation-based detection of chirped laser molecular dispersion spectra 有权
标题翻译：啁啾调制基于啁啾激光分子分散光谱的检测
公开(公告)号：US09025163B2
公开(公告)日：2015-05-05
申请号：US13453499
申请日：2012-04-23
申请人： Gerard Wysocki , Michal Nikodem
发明人： Gerard Wysocki , Michal Nikodem
IPC分类号： G01N21/41 , G01N21/45
CPC分类号： G01N21/45 , G01N2021/451
摘要： An apparatus and method for detecting refractive index variations in a sample is disclosed. The apparatus includes a multi frequency laser source configured to generate a mixed laser beam having at least two optical frequencies. A sinusoidal function generator is configured to modulate the optical frequencies to generate a chirp-modulated mixed laser beam. The chirp-modulated mixed laser beam being configured to pass through the sample. A detector is configured to detect the chirp-modulated mixed beam. A signal processer is configured to process the detected chirp-modulated mixed beam to measure refractive index variations in the sample.
摘要翻译：公开了一种用于检测样品中折射率变化的装置和方法。该装置包括被配置为产生具有至少两个光学频率的混合激光束的多频激光源。正弦函数发生器被配置为调制光频率以产生啁啾调制的混合激光束。啁啾调制混合激光束被配置成通过样品。检测器被配置为检测啁啾调制混合光束。信号处理器被配置为处理检测到的啁啾调制混合光束以测量样品中的折射率变化。

2. 发明申请

US20100067554A1 Fast wavelength tuning techniques for external cavity lasers 有权
标题翻译：用于外腔激光器的快速波长调谐技术
公开(公告)号：US20100067554A1
公开(公告)日：2010-03-18
申请号：US12349839
申请日：2009-01-07
申请人： Gerard Wysocki , Frank K. Tittel
发明人： Gerard Wysocki , Frank K. Tittel
IPC分类号： H01S3/1055 , H01S3/08 , G02B26/08
CPC分类号： H01S5/141 , B82Y20/00 , G02B26/0808 , G02B26/0816 , G02B26/0883 , H01S5/0071 , H01S5/024 , H01S5/02415 , H01S5/028 , H01S5/3402
摘要： An apparatus comprising a laser source configured to emit a light beam along a first path, an optical beam steering component configured to steer the light beam from the first path to a second path at an angle to the first path, and a diffraction grating configured to reflect back at least a portion of the light beam along the second path, wherein the angle determines an external cavity length. Included is an apparatus comprising a laser source configured to emit a light beam along a first path, a beam steering component configured to redirect the light beam to a second path at an angle to the first path, wherein the optical beam steering component is configured to change the angle at a rate of at least about one Kilohertz, and a diffraction grating configured to reflect back at least a portion of the light beam along the second path.
摘要翻译：一种装置，包括被配置为沿着第一路径发射光束的激光源，配置成将光束从第一路径转向与第一路径成一定角度的第二路径的光束转向部件，以及衍射光栅，被配置为沿着第二路径反射光束的至少一部分，其中该角度确定外部腔体长度。包括一种装置，其包括配置成沿着第一路径发射光束的激光源，被配置为将光束以与第一路径成一定角度的方式重定向到第二路径的光束控制部件，其中光束转向部件被配置为以至少约1千赫的速率改变角度，以及衍射光栅，被配置成沿着第二路径反射光束的至少一部分。

3. 发明授权

US09244006B2 Detecting species in a dilute medium 有权
标题翻译：在稀释介质中检测物种
公开(公告)号：US09244006B2
公开(公告)日：2016-01-26
申请号：US13502039
申请日：2010-11-12
申请人： Damien Weidmann , Gerard Wysocki
发明人： Damien Weidmann , Gerard Wysocki
IPC分类号： G01B9/02 , G01N21/45
CPC分类号： G01N21/45
摘要： Method and apparatus for detecting a species in a dilute medium, the species having a spectral feature, the apparatus comprising: a beam source arranged to generate a first laser beam and a second laser beam coherent with each other, and having a matching chirp pattern. Beam guide arranged to pass at least the first laser beam through the dilute medium; a beam mixer arranged to mix the first and the second laser beams to form a mixed beam. Detector arranged to detect, during the chirp pattern, the mixed beam and to measure changes in the mixed beam caused by refractive index variations in the dilute medium across a spectral feature. Output providing a signal that changes in response to the measured changes.
摘要翻译：用于检测稀释介质中物种的方法和装置，所述物质具有光谱特征，所述装置包括：束源，其布置成产生彼此相干并具有匹配啁啾图案的第一激光束和第二激光束。光束引导件布置成使至少第一激光束通过稀释介质; 布置成混合第一和第二激光束以形成混合光束的光束混合器。检测器布置成在啁啾模式期间检测混合光束，并且测量由光谱特征中的稀释介质中的折射率变化引起的混合光束的变化。输出提供响应于测量的变化而改变的信号。

4. 发明授权

US07733924B2 Piezo activated mode tracking system for widely tunable mode-hop-free external cavity mid-IR semiconductor lasers 失效
标题翻译：压电激活模式跟踪系统，用于广泛的无模式跳跃型外腔中红外半导体激光器
公开(公告)号：US07733924B2
公开(公告)日：2010-06-08
申请号：US11203785
申请日：2005-08-15
申请人： Gerard Wysocki , Frank K. Tittel , Robert F. Curl
发明人： Gerard Wysocki , Frank K. Tittel , Robert F. Curl
IPC分类号： H01S3/10
CPC分类号： H01S5/141 , B82Y20/00 , G01N21/3504 , G01N21/39 , H01S3/139 , H01S5/0222 , H01S5/02415 , H01S5/0617 , H01S5/06817 , H01S5/1039 , H01S5/3401
摘要： A widely tunable, mode-hop-free semiconductor laser operating in the mid-IR comprises a QCL laser chip having an effective QCL cavity length, a diffraction grating defining a grating angle and an external cavity length with respect to said chip, and means for controlling the QCL cavity length, the external cavity length, and the grating angle. The laser of claim 1 wherein said chip may be tuned over a range of frequencies even in the absence of an anti-reflective coating. The diffraction grating is controllably pivotable and translatable relative to said chip and the effective QCL cavity length can be adjusted by varying the injection current to the chip. The laser can be used for high resolution spectroscopic applications and multi species trace-gas detection. Mode-hopping is avoided by controlling the effective QCL cavity length, the external cavity length, and the grating angle so as to replicate a virtual pivot point.
摘要翻译：在中红外工作的可广泛调谐的无模式跳变半导体激光器包括具有有效QCL腔长度的QCL激光器芯片，相对于所述芯片限定光栅角度和外部腔体长度的衍射光栅，以及用于控制QCL腔长度，外腔长度和光栅角度。 2.如权利要求1所述的激光器，其特征在于，即使在没有抗反射涂层的情况下，也可以在频率范围内调节所述芯片。衍射光栅相对于所述芯片可控制地枢转和平移，并且可以通过改变对芯片的注入电流来调节有效的QCL腔体长度。激光可用于高分辨率光谱应用和多种痕量气体检测。通过控制有效的QCL腔长度，外腔长度和光栅角度来避免跳频，以便复制虚拟枢轴点。

5. 发明申请

US20160334507A1 SIMULTANEOUS RANGING AND REMOTE CHEMICAL SENSING UTILIZING OPTICAL DISPERSION OR ABSORPTION SPECTROSCOPY 审中-公开
标题翻译：使用光学分散或吸收光谱的同时测量和远程化学传感
公开(公告)号：US20160334507A1
公开(公告)日：2016-11-17
申请号：US15151812
申请日：2016-05-11
申请人： Andreas Hangauer , Gerard Wysocki
发明人： Andreas Hangauer , Gerard Wysocki
IPC分类号： G01S7/48 , G01S17/32
CPC分类号： G01S7/4802 , G01J3/0278 , G01J3/4338 , G01J2001/4242 , G01N21/39 , G01N2021/1793 , G01N2021/394 , G01S17/325 , G01S17/95 , Y02A90/19
摘要： A system for simultaneous optical pathlength determination and remote chemical sensing of a sample disposed along an optical path. A modulated laser source configured for modulated light emission so that at least one spectral sideband with a sideband frequency is created, the modulated light emission is directed along the optical path and sideband frequency is varied over time. A detector is configured to detect transmitted light along the optical path and generate a detected light intensity signal. A frequency down-converter is configured to receive the detected light emission signal and generate a frequency down-converted light intensity signal. A demodulator is configured to demodulate the frequency of the down-converted light intensity signal and output an instantaneous frequency. A pathlength calculator is configured to determine an optical pathlength to the sample based on the instantaneous frequency. A frequency down-converted light intensity signal is simultaneously output for spectroscopic chemical sensing.
摘要翻译：一种用于沿着光路设置的样本的同时光程长度确定和远程化学感测的系统。被配置用于调制发光的调制激光源，使得产生具有边带频率的至少一个频谱边带，调制光发射沿着光路被引导，并且边带频率随时间变化。检测器被配置为检测沿着光路的透射光并产生检测到的光强度信号。降频转换器被配置为接收检测到的发光信号并产生降频转换的光强度信号。解调器被配置为解调下变频光强度信号的频率并输出瞬时频率。路径长度计算器被配置为基于瞬时频率确定样本的光程长度。同时输出降频转换光强度信号用于光谱化学感测。

6. 发明授权

US08947663B2 Dual-modulation faraday rotation spectroscopy 有权
标题翻译：双调制法拉第旋转光谱
公开(公告)号：US08947663B2
公开(公告)日：2015-02-03
申请号：US14215739
申请日：2014-03-17
申请人： Yin Wang , Gerard Wysocki
发明人： Yin Wang , Gerard Wysocki
IPC分类号： G01J4/00 , G01J4/04 , G01N21/21
CPC分类号： G01N21/21 , G01J3/447 , G01N21/1717 , G01N2021/1727
摘要： A dual-modulation Faraday rotation spectroscopic (FRS) system is disclosed. The FRS system uses an FRS sample cell configured to subject a sample to a low frequency modulated magnetic field. The system includes a polarized laser light source configured to generate a high frequency wavelength-modulated light beam incident on the sample, the high frequency wavelength-modulated light beam being modulated at a higher frequency than the low frequency modulated magnetic field. A polarizer is configured to receive from the sample a transmitted light beam having a modulated polarization having a polarization rotation and translate the modulated polarization of the transmitted light beam into an intensity modulated beam. A photodetector is configured to detect the intensity modulated beam and generate a photodetector signal. A dual demodulator is coupled to the photodetector and is configured to demodulate the photodetector signal.
摘要翻译：公开了一种双调制法拉第旋转光谱（FRS）系统。 FRS系统使用被配置为使样本进入低频调制磁场的FRS采样单元。该系统包括被配置为产生入射在样品上的高频波长调制光束的偏振激光光源，高频波长调制光束以比低频调制磁场更高的频率进行调制。偏振器被配置为从样本接收具有具有偏振旋转的调制偏振的透射光束，并将透射光束的调制偏振转换成强度调制光束。光电检测器被配置为检测强度调制光束并产生光电检测器信号。双重解调器耦合到光电检测器并且被配置为解调光电检测器信号。

7. 发明申请

US20140268148A1 Dual-Modulation Faraday Rotation Spectroscopy 有权
标题翻译：双调制法拉第旋转光谱
公开(公告)号：US20140268148A1
公开(公告)日：2014-09-18
申请号：US14215739
申请日：2014-03-17
申请人： Yin Wang , Gerard Wysocki
发明人： Yin Wang , Gerard Wysocki
IPC分类号： G01J4/04 , G01N21/21
CPC分类号： G01N21/21 , G01J3/447 , G01N21/1717 , G01N2021/1727
摘要： A dual-modulation Faraday rotation spectroscopic (FRS) system is disclosed. The FRS system uses an FRS sample cell configured to subject a sample to a low frequency modulated magnetic field. The system includes a polarized laser light source configured to generate a high frequency wavelength-modulated light beam incident on the sample, the high frequency wavelength-modulated light beam being modulated at a higher frequency than the low frequency modulated magnetic field. A polarizer is configured to receive from the sample a transmitted light beam having a modulated polarization having a polarization rotation and translate the modulated polarization of the transmitted light beam into an intensity modulated beam. A photodetector is configured to detect the intensity modulated beam and generate a photodetector signal. A dual demodulator is coupled to the photodetector and is configured to demodulate the photodetector signal.
摘要翻译：公开了一种双调制法拉第旋转光谱（FRS）系统。 FRS系统使用被配置为使样本进入低频调制磁场的FRS采样单元。该系统包括被配置为产生入射在样品上的高频波长调制光束的偏振激光光源，高频波长调制光束以比低频调制磁场更高的频率进行调制。偏振器被配置为从样本接收具有具有偏振旋转的调制偏振的透射光束，并将透射光束的调制偏振转换成强度调制光束。光电检测器被配置为检测强度调制光束并产生光电检测器信号。双重解调器耦合到光电检测器并且被配置为解调光电检测器信号。

8. 发明授权

US08334980B2 Integrated embedded processor based laser spectroscopic sensor 有权
公开(公告)号：US08334980B2
公开(公告)日：2012-12-18
申请号：US13325568
申请日：2011-12-14
申请人： Stephen So , Gerard Wysocki , J. Patrick Frantz , Frank K. Tittel
发明人： Stephen So , Gerard Wysocki , J. Patrick Frantz , Frank K. Tittel
IPC分类号： G01N21/00
CPC分类号： G01N21/39 , G01N21/1702 , G01N21/274 , G01N2021/1708
摘要： A novel low-power and compact laser spectroscopic sensor is described herein. Embodiments of the disclosed sensor utilize state-of-the-art microprocessors and digital processing techniques to reduce power consumption and integrate functions into a small device. In particular, novel software methods are disclosed which allow the use of low-power microprocessors which draw no more than about 0.02 W of power. Such low-power enables long battery life and allows embodiments of the sensor to be used in portable applications. In addition, the system architecture and methods described in this disclosure allow a single integrated embedded processor to control all the subsystems necessary for a laser spectroscopic sensor further reducing sensor size and power consumption. In addition, a power efficient method of calibrating a photoacoustic laser spectroscopic sensor is disclosed.

9. 发明申请

US20120274929A1 DETECTING SPECIES IN A DILUTE MEDIUM 有权
标题翻译：检测物种在稀释中
公开(公告)号：US20120274929A1
公开(公告)日：2012-11-01
申请号：US13502039
申请日：2010-11-12
申请人： Damien Weidmann , Gerard Wysocki
发明人： Damien Weidmann , Gerard Wysocki
IPC分类号： G01N21/41
CPC分类号： G01N21/45
摘要： Method and apparatus for detecting a species in a dilute medium, the species having a spectral feature, the apparatus comprising: a beam source arranged to generate a first laser beam and a second laser beam coherent with each other, and having a matching chirp pattern. Beam guide arranged to pass at least the first laser beam through the dilute medium; a beam mixer arranged to mix the first and the second laser beams to form a mixed beam. Detector arranged to detect, during the chirp pattern, the mixed beam and to measure changes in the mixed beam caused by refractive index variations in the dilute medium across a spectral feature. Output providing a signal that changes in response to the measured changes.
摘要翻译：用于检测稀释介质中物种的方法和装置，所述物质具有光谱特征，所述装置包括：束源，其布置成产生彼此相干并具有匹配啁啾图案的第一激光束和第二激光束。光束引导件布置成使至少第一激光束通过稀释介质; 布置成混合第一和第二激光束以形成混合光束的光束混合器。检测器布置成在啁啾模式期间检测混合光束，并且测量由光谱特征中的稀释介质中的折射率变化引起的混合光束的变化。输出提供响应于测量的变化而改变的信号。

10. 发明申请

US20070047599A1 Piezo activated mode tracking system for widely tunable mode-hop-free external cavity mid-IR semiconductor lasers 失效
标题翻译：压电激活模式跟踪系统，用于广泛的无模式跳跃型外腔中红外半导体激光器
公开(公告)号：US20070047599A1
公开(公告)日：2007-03-01
申请号：US11203785
申请日：2005-08-15
申请人： Gerard Wysocki , Frank Tittel , Robert Curl
发明人： Gerard Wysocki , Frank Tittel , Robert Curl
IPC分类号： H01S3/10 , H01S3/08
CPC分类号： H01S5/141 , B82Y20/00 , G01N21/3504 , G01N21/39 , H01S3/139 , H01S5/0222 , H01S5/02415 , H01S5/0617 , H01S5/06817 , H01S5/1039 , H01S5/3401
摘要： A widely tunable, mode-hop-free semiconductor laser operating in the mid-IR comprises a QCL laser chip having an effective QCL cavity length, a diffraction grating defining a grating angle and an external cavity length with respect to said chip, and means for controlling the QCL cavity length, the external cavity length, and the grating angle. The laser of claim 1 wherein said chip may be tuned over a range of frequencies even in the absence of an anti-reflective coating. The diffraction grating is controllably pivotable and translatable relative to said chip and the effective QCL cavity length can be adjusted by varying the injection current to the chip. The laser can be used for high resolution spectroscopic applications and multi species trace-gas detection. Mode-hopping is avoided by controlling the effective QCL cavity length, the external cavity length, and the grating angle so as to replicate a virtual pivot point.
摘要翻译：在中红外工作的可广泛调谐的无模式跳变半导体激光器包括具有有效QCL腔长度的QCL激光器芯片，相对于所述芯片限定光栅角度和外部腔体长度的衍射光栅，以及用于控制QCL腔长度，外腔长度和光栅角度。 2.如权利要求1所述的激光器，其特征在于，即使在没有抗反射涂层的情况下，也可以在频率范围内调节所述芯片。衍射光栅相对于所述芯片可控制地枢转和平移，并且可以通过改变对芯片的注入电流来调节有效的QCL腔体长度。激光可用于高分辨率光谱应用和多种痕量气体检测。通过控制有效的QCL腔长度，外腔长度和光栅角度来避免跳频，以便复制虚拟枢轴点。

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