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1. 发明申请

US20090310627A1 LASER FOR PROVIDING PULSED LIGHT AND REFLECTOMETRIC APPARATUS INCORPORATING SUCH A LASER 有权
标题翻译：提供脉冲光的激光和包含这种激光的反射装置
公开(公告)号：US20090310627A1
公开(公告)日：2009-12-17
申请号：US12373986
申请日：2007-07-18
申请人： Hongxin Chen , Gregory Walter Schinn
发明人： Hongxin Chen , Gregory Walter Schinn
IPC分类号： H01S3/30 , G01N21/00
CPC分类号： H01S5/146 , H01S5/06216 , H01S5/1071 , H01S5/141 , H01S5/50
摘要： A laser for generating laser light pulses comprises a cavity containing an active optical gain medium (102) and a spectral filtering device (104), a delay device (110) for delaying light by a predetermined delay time (Δt), means (106) for extracting a portion of laser light from the cavity, launching said portion into said delay means (110) and returning the delayed portion to the optical gain medium (102), control means (116) operable to activate the gain medium for a first time period (C1) to produce a first laser light pulse (LP1) having a duration that is less than the delay time (Δt), and activate the gain medium for a second time period (C2) while a said delayed portion of the first light pulse that has been delayed by the delay means (UO) is traversing the gain medium (102), thereby to produce a second laser pulse (LP2) having a shorter duration and faster risetime than the first laser light pulse (LP1), and output means (108) for outputting the second laser light pulse (LP2).
摘要翻译：一种用于产生激光脉冲的激光器包括：包含有源光学增益介质（102）和光谱滤波装置（104）的空腔;延迟装置（110），用于将光延迟预定延迟时间（Deltat）;装置（106）用于从所述空腔提取一部分激光，将所述部分启动到所述延迟装置（110）中并将延迟部分返回到光学增益介质（102），控制装置（116）可操作以第一次激活增益介质周期（C1）以产生具有小于延迟时间（Deltat）的持续时间的第一激光脉冲（LP1），并且在第一时间段（C2）的所述延迟部分激活第二时间段（C2）的增益介质由延迟装置（UO）延迟的脉冲正在越过增益介质（102），从而产生具有比第一激光脉冲（LP1）更短的持续时间和更快的上升时间的第二激光脉冲（LP2），并输出用于输出第二激光脉冲的装置（108）（LP2）。

2. 发明授权

US07957436B2 Laser for providing pulsed light and reflectometric apparatus incorporating such a laser 有权
标题翻译：用于提供脉冲光的激光器和结合这样的激光器的反射测量装置
公开(公告)号：US07957436B2
公开(公告)日：2011-06-07
申请号：US12373986
申请日：2007-07-18
申请人： Hongxin Chen , Gregory Walter Schinn
发明人： Hongxin Chen , Gregory Walter Schinn
IPC分类号： H01S3/10
CPC分类号： H01S5/146 , H01S5/06216 , H01S5/1071 , H01S5/141 , H01S5/50
摘要： A laser for generating laser light pulses comprises a cavity containing an active optical gain medium (102) and a spectral filtering device (104), a delay device (110) for delaying light by a predetermined delay time (Δt), means (106) for extracting a portion of laser light from the cavity, launching said portion into said delay means (110) and returning the delayed portion to the optical gain medium (102), control means (116) operable to activate the gain medium for a first time period (C1) to produce a first laser light pulse (LP1) having a duration that is less than the delay time (Δt), and activate the gain medium for a second time period (C2) while a said delayed portion of the first light pulse that has been delayed by the delay means (UO) is traversing the gain medium (102), thereby to produce a second laser pulse (LP2) having a shorter duration and faster risetime than the first laser light pulse (LP1), and output means (108) for outputting the second laser light pulse (LP2).
摘要翻译：一种用于产生激光脉冲的激光器包括一个包含有源光学增益介质（102）和一个光谱滤波装置（104）的腔体，一个用于将光延迟预定延迟时间（＆Dgr; t）的延迟装置（110） 106），用于从所述空腔提取一部分激光，将所述部分启动到所述延迟装置（110）中并将延迟部分返回到光学增益介质（102），控制装置（116）可操作以激活用于第一时间段（C1）以产生具有小于延迟时间（＆Dgr; t）的持续时间的第一激光脉冲（LP1），并且在第二时间段（C2）激活增益介质，同时所述延迟部分已经被延迟装置延迟的第一光脉冲（UO）正在越过增益介质（102），从而产生具有比第一激光脉冲（LP1）更短的持续时间和更快的上升时间的第二激光脉冲（LP2））和用于输出第二激光脉冲的输出装置（108）（LP2）。

3. 发明授权

US07382810B2 Widely-tunable laser apparatus 失效
标题翻译：广泛可调的激光设备
公开(公告)号：US07382810B2
公开(公告)日：2008-06-03
申请号：US11652634
申请日：2007-01-12
申请人： Gang He , Daniel Gariépy , Hongxin Chen , François Babin
发明人： Gang He , Daniel Gariépy , Hongxin Chen , François Babin
IPC分类号： H01S3/10
CPC分类号： H01S3/083 , H01S5/141 , H01S5/4087
摘要： A widely-tunable laser apparatus comprises a plurality of tunable lasers having different ranges that overlap to encompass a desired operating range of wavelengths (for example from 1250 nm to 1650 nm) of the widely-tunable laser apparatus. The tunable lasers are tunable synchronously and selectively with their respective outputs connected in common to sweep the output of the widely-tunable laser apparatus substantially continuously over said operating range. The tunable lasers share the same tuning means which has a plurality of independent channels, each for light from a respective one of the tunable lasers.
摘要翻译：广泛可调谐的激光装置包括具有不同范围的多个可调激光器，其重叠以包含广泛可调激光装置的期望的波长（例如1250nm至1650nm）的工作范围。可调谐激光器可以同步和选择性地可调谐，其各自的输出共同连接，以在所述操作范围内基本连续地扫描广泛可调激光设备的输出。可调激光器共享相同的调谐装置，该调谐装置具有多个独立通道，每个独立通道用于来自可调激光器的相应一个的光。

4. 发明申请

US20100073667A1 Method and Apparatus for Determining Differential Group Delay and Polarization Mode Dispersion 审中-公开
标题翻译：用于确定差分组延迟和极化模式色散的方法和装置
公开(公告)号：US20100073667A1
公开(公告)日：2010-03-25
申请号：US12568554
申请日：2009-09-28
申请人： Normand Cyr , Hongxin Chen
发明人： Normand Cyr , Hongxin Chen
IPC分类号： G01N21/84
CPC分类号： G01M11/336 , G01M11/3163 , G01M11/3181
摘要： A method and apparatus for measuring at least one polarization-related characteristic of an optical path (FUT) uses an optical source means connected to the FUT at or adjacent a proximal end of the FUT and an analyzing-and-detection unit connected to the FUT at or adjacent its proximal or distal end. The optical source means injects into the FUT at least partially polarized light having a controlled state of polarization (I-SOP). The analyzer-and-detection unit extracts corresponding light from the FUT, analyzes and detects the extracted light corresponding to at least one transmission axis (A-SOP), and processes the corresponding electrical signal to obtain transmitted coherent optical power at each wavelength of light in each of at least two groups of wavelengths, wherein the lowermost (λl) and uppermost (λU) said wavelengths in each said group of wavelengths are closely-spaced. A processing unit than computes at least one difference in a measured power parameter corresponding to each wavelength in a wavelength pair for each of the at least two groups, the measured power parameter being proportional to the power of the said analyzed and subsequently detected light, thereby defining a set of at least two measured power parameter differences; computes the mean-square value of said set of differences; and calculating the at least one polarization-related FUT characteristic as at least one predetermined function of said mean-square value, the predetermined function being dependent upon the small optical frequency difference between the wavelengths corresponding to the said each at least said two pairs of closely-spaced wavelengths.
摘要翻译：用于测量光路（FUT）的至少一个偏振相关特性的方法和装置使用连接到FUT近端或其附近的FUT的光源装置，以及连接到FUT的分析和检测单元在其近端或远端附近。光源装置将具有受控的偏振态（I-SOP）的至少部分偏振光注入到FUT中。分析仪检测单元从FUT中提取相应的光，分析并检测与至少一个透射轴（A-SOP）相对应的提取光，并对相应的电信号进行处理，以在光的每个波长处获得透射的相干光焦度在至少两组波长中的每一个中，其中每个所述波长组中的最低（λ1）和最上（λU）个波长是紧密间隔的。一个处理单元，其计算与所述至少两个组中的每个组的波长对中的每个波长相对应的测量功率参数中的至少一个差异，所测量的功率参数与所述分析和随后检测到的光的功率成比例，从而定义一组至少两个测量的功率参数差; 计算所述差异集合的均方值; 以及计算所述至少一个偏振相关的FUT特性作为所述均方值的至少一个预定函数，所述预定函数取决于对应于所述每个至少所述两对密切对应的波长之间的小的光学频率差间隔波长。

5. 发明申请

US20090244522A1 Polarization Optical Time Domain Reflectometer and Method of Determining PMD 失效
标题翻译：极化光时域反射计及PMD的测定方法
公开(公告)号：US20090244522A1
公开(公告)日：2009-10-01
申请号：US11992797
申请日：2006-09-29
申请人： Normand Cyr , Hongxin Chen
发明人： Normand Cyr , Hongxin Chen
IPC分类号： G01N21/00 , G06F15/00
CPC分类号： G01M11/3181
摘要： In a method of measuring cumulative polarization mode dispersion (PMD) along the length of a fiber-under-test (FUT), a polarization-sensitive optical time domain reflectometer (POTDR) is used to inject into the FUT plural series of light pulses arranged in several groups. Each group comprises at least two series of light pulses having different but closely-spaced wavelengths and the same state of polarization (SOP). At least two, and preferably a large number of such groups, are injected and corresponding OTDR traces obtained for each series of light pulses by averaging the impulse-response signals of the several series of light pulses in the group. The process is repeated for a large number of groups having different wavelengths and/or SOPs. The PMD then is obtained by normalizing the OTDR traces of all of the groups, then computing the difference between each normalized OTDR trace in one group and the corresponding normalized OTDR trace in another group, followed by the mean-square value of the differences. Finally, the PMD is computed as a predetermined function of the mean-square difference. The function may, for example, be a differential formula, an arcsine formula, and so on.
摘要翻译：在沿着被测光纤（FUT）的长度测量累积偏振模色散（PMD）的方法中，使用极化敏感光时域反射计（POTDR）将FUT多个系列的光脉冲在几个组。每个组包括至少两个具有不同但紧密相隔的波长和相同的偏振状态（SOP）的光脉冲序列。通过平均组中若干系列的光脉冲的脉冲响应信号，为每一系列光脉冲注入至少两个，优选大量的这样的基团和相应的OTDR迹线。对于具有不同波长和/或SOP的大量组重复该过程。然后通过归一化所有组的OTDR迹线获得PMD，然后计算一组中的每个归一化OTDR迹线与另一组中对应的归一化OTDR迹线之间的差异，随后是差的均方值。最后，将PMD计算为均方差的预定函数。该函数可以是例如微分公式，反正弦公式等。

6. 发明申请

US20080100828A1 Polarization-sensitive optical time domain reflectometer and method for determining PMD 审中-公开
标题翻译：偏振敏感光时域反射计和PMD测定方法
公开(公告)号：US20080100828A1
公开(公告)日：2008-05-01
申请号：US11727759
申请日：2007-03-28
申请人： Normand Cyr , Hongxin Chen
发明人： Normand Cyr , Hongxin Chen
IPC分类号： G01N21/00
CPC分类号： G01M11/3181
摘要： In a method of measuring cumulative polarization mode dispersion (PMD) along the length of a fiber-under-test (FUT), a polarization-sensitive optical time domain reflectometer (POTDR) is used to inject into the FUT plural series of light pulses arranged in several groups. Each group comprises at least two series of light pulses having different but closely-spaced wavelengths and the same state of polarization (SOP). At least two, and preferably a large number of such groups, are injected and corresponding OTDR traces obtained for each series of light pulses by averaging the impulse-response signals of the several series of light pulses in the group. The process is repeated for a large number of groups having different wavelengths and/or SOPs. The PMD then is obtained from the resulting normalized OTDR traces of all of the groups, by computing the difference between each normalized OTDR trace in one group and the corresponding normalized OTDR trace in another group, followed by the mean-square value of the differences. Finally, the PMD is computed as a predetermined function of the mean-square difference. The function may, for example, be a differential formula, an arcsine formula, and so on.
摘要翻译：在沿着被测光纤（FUT）的长度测量累积偏振模色散（PMD）的方法中，使用极化敏感光时域反射计（POTDR）将FUT多个系列的光脉冲在几个组。每个组包括至少两个具有不同但紧密相隔的波长和相同的偏振状态（SOP）的光脉冲序列。通过平均组中若干系列的光脉冲的脉冲响应信号，为每一系列光脉冲注入至少两个，优选大量的这样的基团和相应的OTDR迹线。对于具有不同波长和/或SOP的大量组重复该过程。然后通过计算一组中的每个归一化OTDR迹线与另一组中对应的归一化OTDR迹线之间的差异，然后是差异的均方根值，从所有组的所得归一化OTDR迹线获得PMD。最后，将PMD计算为均方差的预定函数。该函数可以是例如微分公式，反正弦公式等。

7. 发明申请

US20070165682A1 Widely-tunable laser apparatus 失效
标题翻译：广泛可调的激光设备
公开(公告)号：US20070165682A1
公开(公告)日：2007-07-19
申请号：US11652634
申请日：2007-01-12
申请人： Gang He , Daniel Gariepy , Hongxin Chen , Francois Babin
发明人： Gang He , Daniel Gariepy , Hongxin Chen , Francois Babin
IPC分类号： H01S3/10 , H01S3/083 , H01S3/08
CPC分类号： H01S3/083 , H01S5/141 , H01S5/4087
摘要： A widely-tunable laser apparatus comprises a plurality of tunable lasers having different ranges that overlap to encompass a desired operating range of wavelengths (for example from 1250 nm to 1650 nm) of the widely-tunable laser apparatus. The tunable lasers are tunable synchronously and selectively with their respective outputs connected in common to sweep the output of the widely-tunable laser apparatus substantially continuously over said operating range. The tunable lasers share the same tuning means which has a plurality of independent channels, each for light from a respective one of the tunable lasers.
摘要翻译：广泛可调谐的激光装置包括具有不同范围的多个可调激光器，其重叠以包含广泛可调激光装置的期望的波长（例如1250nm至1650nm）的工作范围。可调谐激光器可以同步和选择性地可调谐，其各自的输出共同连接，以在所述操作范围内基本连续地扫描广泛可调激光设备的输出。可调激光器共享相同的调谐装置，该调谐装置具有多个独立通道，每个独立通道用于来自可调激光器的相应一个的光。

8. 发明申请

US20140071436A1 DETERMINING A POLARIZATION-RELATED CHARACTERISTIC OF AN OPTICAL LINK 有权
标题翻译：确定光学链路的极化相关特性
公开(公告)号：US20140071436A1
公开(公告)日：2014-03-13
申请号：US13767851
申请日：2013-02-14
申请人： Normand Cyr , Hongxin Chen , Gregory Waltet Schinn
发明人： Normand Cyr , Hongxin Chen , Gregory Waltet Schinn
IPC分类号： G01N21/21 , G06F17/18
CPC分类号： G01N21/21 , G01M11/3163 , G01M11/3181 , G01M11/335 , G01M11/336 , G06F17/18
摘要： A polarization-related characteristic of an optical path is determined from a predetermined function of the mean-square of a plurality of differences between polarization-analyzed optical power parameters corresponding to pairs of wavelengths mutually spaced about a midpoint wavelength by a small optical frequency difference. At least some of the said differences correspond to wavelength pairs measured under conditions where at least one of midpoint wavelength, input state of polarization (I-SOP) or analyzed state of polarization (A-SOP) of a pair is different.
摘要翻译：光路的极化相关特性是根据对应于中点波长相互间隔的一对波长的偏振分析光功率参数之间的多个差的平均值的预定函数由小的光频差确定的。所述差异中的至少一些对应于在一对中点波长，输入偏振态（I-SOP）或分析的偏振状态（A-SOP）中的至少一个不同的条件下测量的波长对。

9. 发明授权

US07920253B2 Polarization optical time domain reflectometer and method of determining PMD 失效
标题翻译：偏振光学时域反射计和PMD的测定方法
公开(公告)号：US07920253B2
公开(公告)日：2011-04-05
申请号：US11992797
申请日：2006-09-29
申请人： Normand Cyr , Hongxin Chen
发明人： Normand Cyr , Hongxin Chen
IPC分类号： G01N21/00 , G01J4/00
CPC分类号： G01M11/3181
摘要： In a method of measuring cumulative polarization mode dispersion (PMD) along the length of a fiber-under-test (FUT), a polarization-sensitive optical time domain reflectometer (POTDR) is used to inject into the FUT plural series of light pulses arranged in several groups. Each group comprises at least two series having closely-spaced wavelengths and the same state of polarization (SOP). At least two of such groups are injected and corresponding OTDR traces obtained for each series by averaging the impulse-response signals of the several series in the group. The process is repeated for a number of groups. The PMD is obtained by normalizing the OTDR traces of all of the groups, then computing the difference between each normalized OTDR trace in one group and the corresponding normalized OTDR trace in another group, followed by the mean-square value of the differences. Finally, the PMD is computed as a predetermined function of the mean-square difference.
摘要翻译：在沿着被测光纤（FUT）的长度测量累积偏振模色散（PMD）的方法中，使用极化敏感光时域反射计（POTDR）将FUT多个系列的光脉冲在几个组。每个组包括具有紧密间隔的波长和相同的极化状态（SOP）的至少两个系列。通过平均组中几个系列的脉冲响应信号，为每个系列注入至少两个这样的组以及相应的OTDR迹线。对于多个组重复该过程。通过归一化所有组的OTDR轨迹，然后计算一组中的每个归一化OTDR轨迹与另一组中相应的归一化OTDR轨迹之间的差异，然后是差值的均方根值，获得PMD。最后，将PMD计算为均方差的预定函数。

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