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    • 2. 发明授权
    • Architecture for air-turbulence-compensated dual-wavelength heterodyne
interferometer
    • 空气湍流补偿双波长外差干涉仪的结构
    • US6014216A
    • 2000-01-11
    • US227998
    • 1999-01-08
    • Paul Zorabedian
    • Paul Zorabedian
    • G01B9/02
    • G01B9/02007G01B9/02003G01B9/02062G01B2290/70
    • An apparatus for measuring the change in position of a stage mirror with reference to a reference mirror when the stage mirror moves between first and second positions. The apparatus includes a light source for generating first and second coincident light beams, the first light beam having a wavelength .lambda..sub.1 and the second light beam having a wavelength .lambda..sub.2 where .lambda..sub.1 =M.lambda..sub.2. The first light beam includes two orthogonally polarized components differing in frequency by a first beat frequency, F.sub.ref (.lambda..sub.1), and the second light beam includes two orthogonally polarized components differing in frequency by a second beat frequency, F.sub.ref (.lambda..sub.2), where F.sub.ref (.lambda..sub.2)=M F.sub.ref (.lambda..sub.1), and M is an integer greater than 1. A polarization dependent beam splitter directs one of the orthogonally polarized components of each of the light beams to the reference mirror and the other of the orthogonally polarized components of each of the light beams to the stage mirror. The polarization dependent beam splitter also recombines the orthogonally polarized components after the orthogonally polarized components have been reflected by either the reference mirror or the stage mirror. The light intensities of the recombined light beams are measured in first and second detectors. The outputs of these detectors are combined to provide an optical path measurement and a correction term that corrects for the density of air along the measurement path, and hence, corrects for any turbulence in the air.
    • 一种用于当舞台镜在第一和第二位置之间移动时,参考参考镜来测量舞台镜的位置变化的装置。 该装置包括用于产生第一和第二重合光束的光源,第一光束具有波长λ1,第二光束具有λ1 = Mλ2的波长λ2。第一光束包括两个正交极化 频率不同的分量为Fref(λ1),第二光束包括频率不同于第二拍频Fref(λ2)的两个正交极化分量,其中Fref(λ2)= M Fref (λ1),M是大于1的整数。偏振相关光束分离器将每个光束的正交偏振分量之一引导到参考反射镜,并且每个光束的另一个正交极化分量 到舞台镜子。 偏振相关光束分离器还在正交极化分量已被参考反射镜或阶段反射镜反射之后重新组合正交极化分量。 在第一和第二检测器中测量重组光束的光强度。 这些检测器的输出被组合以提供光路测量和校正项,其校正沿着测量路径的空气密度,因此校正空气中的任何湍流。
    • 4. 发明授权
    • Tunable laser transmitter with internal wavelength grid generators
    • 具有内部波长网格发生器的可调谐激光发射器
    • US06526071B1
    • 2003-02-25
    • US09507557
    • 2000-02-18
    • Paul ZorabedianWilliam B. ChapmanEvan D. H. GreenMichael Y. Jenq
    • Paul ZorabedianWilliam B. ChapmanEvan D. H. GreenMichael Y. Jenq
    • H01S310
    • H01S5/141H01S3/1062H01S5/02248H01S5/02284H01S5/0617H01S5/0622H01S5/0687H01S5/4087
    • The present invention provides a continuously tunable external cavity laser (ECL) with a compact form factor and precise tuning to a selected center wavelength of a selected wavelength grid. The ECL may thus be utilized in telecom applications to generate the center wavelengths for any channel on the ITU or other optical grid. The ECL does not require a closed loop feedback. A novel tuning mechanism is disclosed which provides for electrical or mechanical tuning to a known position or electrical parameter, e.g., voltage, current or capacitance, with the required precision in the selected center wavelength arising as a result of a novel arrangement of a grid generator and a channel selector. The grid generator exhibits first pass bands which correspond to the spacing between individual channels of the selected wavelength grid and a finesse which suppresses side band modes of the laser. The channel selector exhibits second pass bands that are wider than the first pass bands. In an embodiment of the invention the second pass bands have a periodicity substantially corresponding with the separation between the shortest wavelength channel and the longest wavelength channel of the selected wavelength grid and a finesse which suppresses channels adjacent to the selected channel. The broad second pass bands of the channel selector reduce the sensitivity of the ECL to tuning variations about the selected channel, thus avoiding the requirement of a closed loop feedback system to control the channel selector.
    • 本发明提供了一种具有紧凑形状因数的可调谐的外腔激光器(ECL),并且精确地调谐到所选择的波长网格的选定的中心波长。 因此,ECL可以用于电信应用中以产生ITU或其他光网格上的任何信道的中心波长。 ECL不需要闭环反馈。 公开了一种新颖的调谐机构,其提供对已知位置或电参数(例如电压,电流或电容)的电或机械调谐,其中所选择的中心波长的所需精度是由于电网发生器的新颖布置而产生的 和频道选择器。 栅格发生器呈现出对应于所选波长栅格的各个通道之间的间隔的第一通过带和抑制激光器的边带模式的精细度。 通道选择器呈现比第一通带宽的第二通带。 在本发明的一个实施例中,第二通带具有基本对应于所选择的波长网格的最短波长信道和最长波长信道之间的间隔的周期性,以及抑制与所选择的信道相邻的信道的精细度。 频道选择器的宽的第二通频带降低了ECL对所选频道调谐变化的灵敏度,从而避免了闭环反馈系统控制频道选择器的要求。
    • 10. 发明授权
    • Systems and methods for coherent beam combining of laser arrays
    • 激光阵列相干光束组合的系统和方法
    • US08248700B1
    • 2012-08-21
    • US12581865
    • 2009-10-19
    • Paul Zorabedian
    • Paul Zorabedian
    • G02B27/10
    • G02B27/46G02B19/0057G02B27/0905H01S5/4012H01S5/423
    • Systems and methods for coherent beam combining are provided. In some aspects, a system may comprise a first array of laser emitters configured to emit a first array of output beams along a first optical path. The system may also comprise a first array of collimating lenses configured to collimate the first array of output beams. The system may also comprise a first lens configured to focus the first array of output beams at a first focal plane. The system may also comprise a first phase screen configured to combine the first array of output beams at the first focal plane to generate one or more first coherently combined beams. Each of the one or more first coherently combined beams corresponds to a phase combination of the first array of output beams.
    • 提供了相干光束组合的系统和方法。 在一些方面,系统可以包括被配置为沿着第一光路发射输出光束的第一阵列的激光发射器的第一阵列。 该系统还可以包括配准为准直第一输出光束阵列的准直透镜的第一阵列。 该系统还可以包括配置成将第一阵列的输出光束聚焦在第一焦平面处的第一透镜。 该系统还可以包括第一相位屏幕,其配置为在第一焦平面处组合输出光束的第一阵列以产生一个或多个第一相干组合光束。 一个或多个第一相干组合光束中的每一个对应于第一输出光束阵列的相位组合。