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公开(公告)号：US09116300B2
公开(公告)日：2015-08-25
申请号：US13146308
申请日：2010-06-25
Applicant: Yanqing Lu , Shuyi Zhang , Qi Zhong , Fei Xu , Xiaowen Lin , Wei Hu
Inventor： Yanqing Lu , Shuyi Zhang , Qi Zhong , Fei Xu , Xiaowen Lin , Wei Hu
CPC classification number: G02B6/29344 , G01J2009/004 , G01N21/45 , G02B6/02295 , G02B6/14 , G02B6/2551 , G02B6/262
Abstract: Technologies are generally described for techniques useful in an interferometer system. In some examples, a system may include a first waveguide effective to propagate a first wave in a first mode. In some examples, the system may include a second waveguide effective to, in response to the first wave, propagate second and third waves in second and third modes, respectively. In some examples, the second waveguide may be effective to reflect the second and third waves off a reflection surface to produce first, second, third and fourth reflected waves. In some examples, the second waveguide may be effective to propagate the first and third reflected waves in the second mode and propagate the second and fourth reflected waves in the third mode.
Abstract translation: 技术通常描述用于干涉仪系统中的技术。 在一些示例中，系统可以包括有效地在第一模式中传播第一波的第一波导。 在一些示例中，系统可以包括有效响应于第一波的第二波导，其分别在第二和第三模式中传播第二和第三波。 在一些示例中，第二波导可以有效地将第二和第三波从反射表面反射以产生第一，第二，第三和第四反射波。 在一些示例中，第二波导可以有效地在第二模式中传播第一和第三反射波，并且在第三模式中传播第二和第四反射波。
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公开(公告)号：US4871250A
公开(公告)日：1989-10-03
申请号：US97275
申请日：1987-09-17
Applicant: Ryoji Koseki
Inventor： Ryoji Koseki
CPC classification number: G01J1/4257 , H01S3/105 , G01J2005/202 , G01J2009/004
Abstract: A beam monitor for a high-output laser has a beam intensity detection means which detects localized beam intensity in the cross section of a high intensity laser beam, and a characteristic calculation means for calculating the beam characteristics of a laser beam based on the localized beam intensity detected by the beam intensity detection means.
Abstract translation: 用于高输出激光器的光束监视器具有：光束强度检测装置，其检测高强度激光束的截面中的局部束强度;以及特征计算装置，用于基于局部束计算激光束的光束特性 由光束强度检测装置检测的强度。
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公开(公告)号：WO2014064636A3
公开(公告)日：2014-07-24
申请号：PCT/IB2013059611
申请日：2013-10-24
Applicant: CSIR
Inventor： FORBES ANDREW , SCHULZE CHRISTIAN , DUPARRÉ MICHAEL RUDOLF , NGCOBO SANDILE
CPC classification number: G01J1/4257 , G01J1/0407 , G01J1/0411 , G01J1/0437 , G01J1/4228 , G01J9/00 , G01J2009/004 , H01S3/0014 , H01S3/005 , H01S3/08054 , H01S3/0815 , H01S3/09415
Abstract: A method and apparatus for performing a modal decomposition of a laser beam are disclosed. The method includes the steps of performing a measurement to determine the second moment beam size (w) and beam propagation factor (M2) of the laser beam, and inferring the scale factor (wO) of the optimal basis set of the laser beam from the second moment beam size and the beam propagation factor, from the relationship: wO = w/M2. An optimal decomposition is performing using the scale factor wO to obtain an optimal mode set of adapted size. The apparatus includes a spatial light modulator arranged for complex amplitude modulation of an incident laser beam, and imaging means arranged to direct the incident laser beam onto the spatial light modulator. A Fourier transforming lens is arranged to receive a laser beam reflected from the spatial light modulator. A detector is placed a distance of one focal length away from the Fourier transforming lens for monitoring a diffraction pattern of the laser beam reflected from the spatial light modulator and passing through the Fourier transforming lens. The apparatus performs an optical Fourier transform on the laser beam reflected from the spatial light modulator and determines the phases of unknown modes of the laser beam, to perform a modal decomposition of the laser beam.
Abstract translation: 公开了一种用于执行激光束的模态分解的方法和装置。 该方法包括以下步骤：执行测量以确定激光束的第二力矩光束尺寸（w）和光束传播因子（M2），并推断来自激光束的激光束的最佳基准集的比例因子（w0） 二次波束尺寸和波束传播因子，从关系：wO = w / M2。 使用比例因子wO执行最佳分解以获得适应尺寸的最佳模式集合。 该装置包括布置成用于入射激光束的复振幅调制的空间光调制器，以及被配置为将入射激光束引导到空间光调制器上的成像装置。 傅里叶变换透镜被布置成接收从空间光调制器反射的激光束。 离开傅里叶变换透镜放置距离一个焦距的检测器，用于监测从空间光调制器反射并穿过傅里叶变换透镜的激光束的衍射图案。 该装置对从空间光调制器反射的激光束进行光学傅立叶变换，并确定激光束的未知模式的相位，以执行激光束的模态分解。
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14.发明申请公开(公告)号：US20170097282A1
公开(公告)日：2017-04-06
申请号：US15381661
申请日：2016-12-16
Applicant: Draka Comteq B.V.
Inventor： Franciscus Johannes Achten , Denis Molin , Pierre Sillard , Marianne Bigot-Astruc
CPC classification number: G01M11/338 , G01J9/00 , G01J2009/004 , G01J2009/006 , G02B6/0288 , G02B6/0365 , G02B6/14
Abstract: The invention concerns a method for characterizing mode group properties of multimodal light traveling through an optical component, comprising: providing a Mode Group Separating optical fiber in an optical path between a light source and said optical component; launching reference pulses of light with a wavelength λt from said light source through said Mode Group Separating optical fiber into said optical component at discrete intervals between a core center and a core radius of said fiber. The Mode Group Separating optical fiber is a multimode fiber with an α-profile graded index core with an α-value chosen such that said fiber satisfies the following criterion at the wavelength λt: Δτ · L Δ T REF > 4 where: Δτ is a time delay difference between consecutive mode groups; L is a length of said fiber; ΔTREF is a Full Width at Quarter Maximum of said reference pulses.
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公开(公告)号：US09134300B2
公开(公告)日：2015-09-15
申请号：US14306898
申请日：2014-06-17
Inventor： Ioannis Danias , Hyungsik Lim
IPC: G01N33/50 , G01J9/00 , G01J4/00 , G01N33/483 , G01N21/63 , G01N21/17 , G01N21/21 , A61B5/00 , A61B3/10 , G02B21/00
CPC classification number: G01N33/5044 , A61B3/10 , A61B5/4848 , G01J4/00 , G01J9/00 , G01J2009/002 , G01J2009/004 , G01N21/1717 , G01N21/21 , G01N21/63 , G01N21/636 , G01N33/4833 , G01N33/5008 , G01N2021/1734 , G02B21/002
Abstract: The subject matter disclosed herein pertains to a method for screening drugs using second-harmonic generation microscopy. The tissue is scanned with a pulsed laser light which has an excitation wavelength. At least some of microtubules within the tissue produce generated light with a second-harmonic wavelength that is half the excitation wavelength. A microtubule pattern within the tissue is determined based on an analysis of the generated second-harmonic wavelength.
Abstract translation: 本文公开的主题涉及使用二次谐波生成显微术来筛选药物的方法。 组织用具有激发波长的脉冲激光扫描。 组织内的至少一些微管产生产生的光，其二次谐波波长是激发波长的一半。 基于生成的二次谐波波长的分析来确定组织内的微管图案。
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Patent Agency Ranking
公开(公告)号：US5078491A
公开(公告)日：1992-01-07
申请号：US515729
申请日：1990-04-26
Applicant: Thomas F. Johnston, Jr.
Inventor： Thomas F. Johnston, Jr.
CPC classification number: G01J1/4257 , G01J2001/4261 , G01J2009/004
Abstract: A method and apparatus for determining the quality of a multimode laser beam (10). In the preferred embodiment, the apparatus includes a lens (32) for creating a transformed or imaged waist from the input beam. The location of the transformed beam waist and its diameter are then determined. These steps can be carried out by chopping the beam using a rotating hub (34) having apertures (36,38) for selectively passing the beam. Preferably, one of the apertures has a pair of 45.degree. knife edges (40,42). The transmission of the beam past the knife edge is monitored by a detector (30). In operation, the lens focal position is varied while the transmission of the beam past the knife edge is monitored in order to locate and measure the diameter of the transformed waist. The diameter of the beam at one other known location is measured. A processor then calculates beam quality by fitting these measurements to a mathematical model. Once the quality of the beam is calculated, the location of the original beam waist and its diameter can be derived. Once all of the beam parameters are derived, the propagation characteristics of the beam can be predicted. In one embodiment of the subject invention, the device includes a blocking member (602) having a knife edge (604) disposed perpendicularly to one of the knife edges of the apertures carried on the hub. The blocking member is translated in discrete steps for each revolution of the hub. The measurement of the power transmitted past the knife edge and blocking member can be used to generate a two-dimensional pixel map of beam intensity.
Abstract translation: 一种用于确定多模激光束（10）的质量的方法和装置。 在优选实施例中，该装置包括用于从输入光束产生变形或成像的腰部的透镜（32）。 然后确定变形的束腰的位置及其直径。 这些步骤可以通过使用具有用于选择性地通过光束的孔（36,38）的旋转毂（34）斩波来进行。 优选地，一个孔具有一对45°刀刃（40,42）。 通过检测器（30）监测光束通过刀刃的透射。 在操作中，透镜焦点位置变化，同时监测光束穿过刀刃的透射，以定位和测量变形腰部的直径。 测量另一个已知位置处的梁的直径。 然后，处理器通过将这些测量拟合到数学模型来计算光束质量。 一旦计算了光束的质量，就可以得出原始光束腰部的位置及其直径。 一旦导出了所有的光束参数，就可以预测光束的传播特性。 在本发明的一个实施例中，该装置包括阻挡构件（602），其具有垂直于轮毂上承载的孔的刀刃之一设置的刀刃（604）。 对于轮毂的每一转，阻挡构件以离散的步骤平移。 通过刀刃和阻挡构件传递的功率的测量可用于产生束强度的二维像素图。
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公开(公告)号：US5069527A
公开(公告)日：1991-12-03
申请号：US511817
申请日：1990-04-26
Applicant: Thomas F. Johnston, Jr. , David A. Dewey
Inventor： Thomas F. Johnston, Jr. , David A. Dewey
CPC classification number: H01S3/0014 , B23K26/02 , B23K26/042 , B23K26/705 , G01J1/4257 , G02B26/04 , G01J2009/004
Abstract: A method and apparatus for determining the quality of a multimode laser beam (10). In the preferred embodiment, the apparatus includes a lens (32) for creating a transformed or imaged waist from the input beam. The location of the transformed beam waist and its diameter are then determined. These steps can be carried out by chopping the beam using a rotating hub (34) having apertures (36, 38) for seletively passing the beam. Preferably, one of the appertures has a pair of 45.degree. knife edges (40, 42). The transmission of the beam past the knife edge is monitored by a detector (30). In operation, the lens focal position is varied while the transmission of the beam past the knife edge is monitored in order to locate and measure the diameter of the transformed waist. The diameter of the beam at one other known location is measured. A processor then calculates beam quality by fitting these measurements to a mathematical model. Once the quality of the beam is calculated, the location of the original beam waist and its diameter can be derived. Once all of the beam parameters are derived, the propagation characteristics of the beam can be predicted. In the preferred embodiment, the lens is defined by a doublet (533, 535) designed to minimize spherical aberration. In addition, the spacing between the lens pair is varied to minimize the net aberration at the operating wavelength of the laser.
Abstract translation: 一种用于确定多模激光束（10）的质量的方法和装置。 在优选实施例中，该装置包括用于从输入光束产生变形或成像的腰部的透镜（32）。 然后确定变形的束腰的位置及其直径。 这些步骤可以通过使用具有孔（36,38）的旋转轮毂（34）来切割梁来进行，用于使梁完全通过。 优选地，一个孔径具有一对45°刀刃（40,42）。 通过检测器（30）监测光束通过刀刃的透射。 在操作中，透镜焦点位置变化，同时监测光束穿过刀刃的透射，以定位和测量变形腰部的直径。 测量另一个已知位置处的梁的直径。 然后，处理器通过将这些测量拟合到数学模型来计算光束质量。 一旦计算了光束的质量，就可以得出原始光束腰部的位置及其直径。 一旦导出了所有的光束参数，就可以预测光束的传播特性。 在优选实施例中，透镜由设计成使球面像差最小化的双峰（533,535）限定。 另外，改变透镜对之间的间距以使激光器的工作波长处的净像差最小化。
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18.发明授权
公开(公告)号：EP0428924B1
公开(公告)日：1995-01-11
申请号：EP90121017.9
申请日：1990-11-02
Applicant: Hughes Aircraft Company
Inventor： Ottusch, John J.
CPC classification number: G01J9/04 , G01J2009/004
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19.发明公开Frequency detector for discriminating multi-longitudinal mode laser operation 失效用于识别多长时间模式激光操作的频率检测器
公开(公告)号：EP0428924A3
公开(公告)日：1992-04-08
申请号：EP90121017.9
申请日：1990-11-02
Applicant: Hughes Aircraft Company
Inventor： Ottusch, John J.
CPC classification number: G01J9/04 , G01J2009/004
Abstract: A photodetector produces an output signal in response to irradiation by an optical beam from a pulled laser. A delay unit delays the output signal for a period corresponding to one-half of one cycle of a beat frequency generated by interaction of two frequency components in the optical beam corresponding to two predetermined longitudinal modes of operation of the laser. A differential mixer subtractively combines the output of the photodetector with the output of the delay unit, to produce an output signal having the main profile of the laser pulses suppressed, and the beat frequency component, if present, amplified. A resonant circuit and amplifier may be provided to further amplify the beat frequency component. The output of the amplifier is integrated to produce a DC signal having a magnitude which corresponds to the amplitude of the beat frequency component. The DC signal is compared with a threshold value to discriminate between single and multi-mode operation of the laser. An optical shutter may be closed in response to sensed multi-longitudinal mode operation to block the laser beam and protect equipment which would otherwise be damaged thereby.
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公开(公告)号：JP2013532285A
公开(公告)日：2013-08-15
申请号：JP2013515662
申请日：2010-06-25
Applicant: ナンキン ユニバーシティー
CPC classification number: G02B6/29344 , G01J2009/004 , G01N21/45 , G02B6/02295 , G02B6/14 , G02B6/2551 , G02B6/262
Abstract: マルチモード干渉計法に関係するデバイスは、第１のモードで動作するように構成されている、第１の波を受け、第１の波を第１の経路にそって第１のモードで伝搬するのに有効である第１の導波路と、第１の導波路と光学的に連通する第２の導波路とを備える。 第２の導波路は、第２のモードおよび第３のモードで動作するように構成される。 第２の導波路は反射面を備え、第１の導波路が第１の波を伝搬するときに第１の波を受け、第１の波に応答して第２の波を第１の経路にそって第２のモードで伝搬し、第１の波に応答して第３の波を第１の経路にそって第３のモードで伝搬し、反射面から第２の波を反射して、第１の反射された波と第２の反射された波とを生成するように構成される。 第２の導波路は、第１の反射された波を第２の経路内の第２のモードで伝搬し、第２の反射された波を第２の経路内の第３のモードで伝搬し、反射面から第３の波を反射して、第３の反射された波と第４の反射された波とを生成し、第３の反射された波を第２の経路内の第３のモードで伝搬し、第４の反射された波を第２の経路内の第２のモードで伝搬するようにも構成される。 このデバイスを利用する方法を提供する。
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