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    Terahertz system
    1.
    发明申请
    Terahertz system 审中-公开
    太赫兹系统

    公开(公告)号：US20150377782A1

    公开(公告)日：2015-12-31

    申请号：US14747696

    申请日：2015-06-23

    Applicant: TOPTICA Photonics AG

    Inventor： Nico Vieweg ,  Florian Rettich

    IPC: G01N21/59 ,  G01N33/483 ,  G01J5/10

    CPC classification number: G01N33/483 ,  G01J3/42 ,  G01J5/0837 ,  G01J5/10 ,  G01N21/3581

    Abstract: The present invention relates to a terahertz system for generating and time-resolved incoherent detecting of THz radiation, said system comprising a pulse laser light source (1) emitting laser pulses with a pulse duration of up to 1 ps at a repetition frequency of at least 1 MHz, a first THz antenna serving as sender (3) which is optically coupled to the laser light source (1) and converts the laser pulses into THz pulses with a pulse duration of up to 10 ps, and a second THz antenna serving as receiver (5). It is the object of the present invention to provide an improved terahertz system. As compared with the state of the art, it is above all intended to allow for a faster incoherent measurement of THz radiation. To this end, the present invention proposes to couple the second THz antenna to a detector circuitry whose bandwidth is at least equivalent to the repetition frequency of the laser light source. Furthermore, the present invention relates to applications of the terahertz system as well to a method for generating and time-resolved incoherent detecting of THz radiation.

    Abstract translation: 本发明涉及用于产生和时分解非相干检测太赫兹辐射的太赫兹系统，所述系统包括脉冲激光光源（1），脉冲激光光源（1）以至少1ps的重复频率发射具有高达1ps的脉冲持续时间的激光脉冲 1MHz，用作发送器（3）的第一THz天线，其被光耦合到激光光源（1）并将激光脉冲转换成具有高达10ps的脉冲持续时间的THz脉冲，并且第二THz天线用作 接收器（5）。 本发明的目的是提供一种改进的太赫兹系统。 与现有技术相比，首先是为了允许对太赫兹辐射的更快的非相干测量。 为此，本发明提出将第二THz天线耦合到其带宽至少等于激光光源的重复频率的检测器电路。 此外，本发明还涉及太赫兹系统的应用以及用于产生和时间分辨的非相干检测太赫兹辐射的方法。

    Optical Scanning
    3.
    发明申请
    Optical Scanning 有权
    光学扫描

    公开(公告)号：US20170047705A1

    公开(公告)日：2017-02-16

    申请号：US15237379

    申请日：2016-08-15

    Applicant: TOPTICA Photonics AG

    Inventor： Christian Rausch ,  Andreas Brodschelm ,  Nico Vieweg ,  Thomas A. Puppe

    IPC: H01S3/13 ,  H01S3/067 ,  H01S3/23 ,  H01S3/09 ,  H01S3/105

    CPC classification number: H01S3/1305 ,  H01S3/067 ,  H01S3/09 ,  H01S3/10046 ,  H01S3/10053 ,  H01S3/1053 ,  H01S3/1112 ,  H01S3/1118 ,  H01S3/1121 ,  H01S3/1307 ,  H01S3/136 ,  H01S3/1394 ,  H01S3/2383

    Abstract: The invention relates to an apparatus for generating temporally spaced apart light pulses, comprising a first laser (11) which generates a first sequence (I) of light pulses at a first repetition rate, a second laser (12) which generates a second sequence (II) of light pulses at a second repetition rate, and at least one actuating member which influences the first repetition rate and/or the second repetition rate. It is an object of the invention to provide an apparatus for generating temporally spaced apart light pulses which is improved in relation to the prior art. This object is achieved by the invention by a control element (23) which applies a periodic modulation signal (24) to the actuating member for periodic variation of the first repetition rate and/or the second repetition rate, wherein the actuating member comprises a mechanical oscillator excited by the modulation signal (24), the deflection of said oscillator causing an adjustment in the resonator length of the first laser (11) and/or second laser (12), wherein the mechanical oscillator oscillates in resonant fashion at the frequency of the modulation signal (24). In accordance with the invention, an actuator (e.g. a piezo-actuator) which adjusts the resonator length of the laser is operated in resonant fashion. As a result, a large maximum time offset of the light-pulse sequences (I, II) with, at the same time, a high scanning speed is rendered possible. Moreover, the invention relates to a method for generating temporally spaced apart light pulses.

    Optical Scanning
    4.
    发明申请
    Optical Scanning 有权
    光学扫描

    公开(公告)号：US20150357788A1

    公开(公告)日：2015-12-10

    申请号：US14729529

    申请日：2015-06-03

    Applicant: TOPTICA Photonics AG

    Inventor： Thomas A. Puppe ,  Nico Vieweg ,  Armin Zach ,  Alexander Sell

    IPC: H01S3/11 ,  H01S3/067 ,  H01S3/23

    CPC classification number: H01S3/1106 ,  G01J3/00 ,  G01J3/10 ,  H01S3/067 ,  H01S3/06712 ,  H01S3/08054 ,  H01S3/082 ,  H01S3/10046 ,  H01S3/107 ,  H01S3/1118 ,  H01S3/1304 ,  H01S3/1307 ,  H01S3/136 ,  H01S3/2383

    Abstract: The invention relates to a device for generating temporally distant light pulses, said device comprising a first light source (51) generating a first sequence (I) of light pulses at a first repetition rate, and a second light source (52) generating a second sequence (II) of light pulses at a second repetition rate. It is the object of the present invention to provide an improved device for generating temporally distant light pulses. This object is inventively achieved by providing for at least one actuator element which influences the first and/or the second repetition rate, and a control element (61) which charges the actuator element with a periodical modulation signal (62) for periodical variation of the first and/or second repetition rate. A control circuit is provided for, comprising a phase detector (57), which derives a control signal (58) from the first light pulse sequence (I) and the second light pulse sequence (II), a corrective element (59, 60) which derives a control deviation signal (63) from the control signal (58) and the modulation signal (62), a control element (64), at the input of which the control deviation signal (63) is pending, and a superposition element (66) which forms an actuator signal (67) from the modulation signal (62) and the output signal (65) of the control element (64), and which charges the actuator element with the actuator signal (67). Moreover, the invention relates to a method for generating temporally distant light pulses.

    Abstract translation: 本发明涉及一种用于产生时间上远的光脉冲的装置，所述装置包括以第一重复率产生光脉冲的第一序列（I）的第一光源（51）和产生第二重复频率的第二光源（52） 光脉冲的序列（II）以第二重复率。 本发明的目的是提供一种用于产生时间上远的光脉冲的改进的装置。 该目的通过提供影响第一和/或第二重复率的至少一个致动器元件和控制元件（61）来实现，该控制元件（61）用周期性调制信号（62）对致动器元件进行充电，用于周期性变化 第一和/或第二重复率。 提供了一种控制电路，包括相位检测器（57），其从第一光脉冲序列（I）和第二光脉冲序列（II）导出控制信号（58），校正元件（59,60） 其从所述控制信号（58）和所述调制信号（62）中导出控制偏差信号（63），控制元件（64）在控制偏差信号（63）待处理的输入端处，以及叠加元件 （66），其从所述调制信号（62）和所述控制元件（64）的输出信号（65）形成致动器信号（67），并且利用所述致动器信号（67）对所述致动器元件充电。 此外，本发明涉及一种用于产生时间上远的光脉冲的方法。

    Optical scanning
    5.
    发明授权
    Optical scanning 有权

    公开(公告)号：US12228505B2

    公开(公告)日：2025-02-18

    申请号：US17342632

    申请日：2021-06-09

    Applicant: TOPTICA Photonics AG

    Inventor： Thomas A. Puppe ,  Nico Vieweg ,  Christian Rausch

    IPC: G01N21/3581

    Abstract: The invention relates to a device for generating temporally spaced light pulses. Said device comprises a first light source which emits a first train of light pulses, a second light source which emits a second train of light pulses, and a phase-locked loop which regulates the relative phase of the light-pulse trains towards a target value. When the two light-pulse trains each pass through an optical transmission path to an application site that is spatially remote from the light sources, fluctuating phase differences in the light-pulse trains at the application site occur due to external influences along the transmission paths. The object of the invention is to provide an improved device for generating temporally spaced light pulses. In particular, the above-mentioned fluctuating phase differences are intended to be prevented. To do this, the invention proposes a detection apparatus that interacts with the phase-locked loop and detects a phase difference in the light-pulse trains at the application site caused by propagation-time differences along the transmission paths. In particular, the phase difference in the light-pulse trains at the application site is derived from light pulses that are reflected from the application site and pass through the transmission paths in the return direction. The detected phase difference can then be compensated for by the existing regulation of the relative phase of the light-pulse trains. In addition, the invention relates to a method for generating temporally spaced light pulses.

    Optical scanning
    6.
    发明授权
    Optical scanning 有权

    公开(公告)号：US09711935B2

    公开(公告)日：2017-07-18

    申请号：US15237379

    申请日：2016-08-15

    Applicant: TOPTICA Photonics AG

    Inventor： Christian Rausch ,  Andreas Brodschelm ,  Nico Vieweg ,  Thomas A. Puppe

    IPC: H01S3/10 ,  H01S3/13 ,  H01S3/09 ,  H01S3/105 ,  H01S3/23 ,  H01S3/067 ,  H01S3/136 ,  H01S3/11

    CPC classification number: H01S3/1305 ,  H01S3/067 ,  H01S3/09 ,  H01S3/10046 ,  H01S3/10053 ,  H01S3/1053 ,  H01S3/1112 ,  H01S3/1118 ,  H01S3/1121 ,  H01S3/1307 ,  H01S3/136 ,  H01S3/1394 ,  H01S3/2383

    Abstract: The invention relates to an apparatus for generating temporally spaced apart light pulses, comprising a first laser (11) which generates a first sequence (I) of light pulses at a first repetition rate, a second laser (12) which generates a second sequence (II) of light pulses at a second repetition rate, and at least one actuating member which influences the first repetition rate and/or the second repetition rate. It is an object of the invention to provide an apparatus for generating temporally spaced apart light pulses which is improved in relation to the prior art. This object is achieved by the invention by a control element (23) which applies a periodic modulation signal (24) to the actuating member for periodic variation of the first repetition rate and/or the second repetition rate, wherein the actuating member comprises a mechanical oscillator excited by the modulation signal (24), the deflection of said oscillator causing an adjustment in the resonator length of the first laser (11) and/or second laser (12), wherein the mechanical oscillator oscillates in resonant fashion at the frequency of the modulation signal (24). In accordance with the invention, an actuator (e.g. a piezo-actuator) which adjusts the resonator length of the laser is operated in resonant fashion. As a result, a large maximum time offset of the light-pulse sequences (I, II) with, at the same time, a high scanning speed is rendered possible. Moreover, the invention relates to a method for generating temporally spaced apart light pulses.

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