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    Method and apparatus for generating terahertz radiation
    2.
    发明申请
    Method and apparatus for generating terahertz radiation 审中-公开
    用于产生太赫兹辐射的方法和装置

    公开(公告)号：US20050018298A1

    公开(公告)日：2005-01-27

    申请号：US10845821

    申请日：2004-05-14

    申请人： Seth Trotz ,  David New ,  Alan Braun

    发明人： Seth Trotz ,  David New ,  Alan Braun

    IPC分类号： G01N21/35 ,  G02B6/04 ,  G02B5/18 ,  G02B27/44

    CPC分类号： H01J25/00 ,  G01N21/35 ,  G01N21/3581

    摘要： The invention is a method and apparatus for generating terahertz radiation. The terahertz source is a versatile terahertz device that can be configured to transmit a plurality of wavelengths, thereby facilitating the detection of multiple contaminants using a single source device. In one embodiment, the Smith-Purcell radiation effect is exploited by passing an electron beam over a modulated conducting surface, wherein the spacing of the periods of the modulated surface is varied. The variations in the modulated surface enable the source to produce light of varying wavelengths.

    摘要翻译： 本发明是用于产生太赫兹辐射的方法和装置。 太赫兹源是通用的太赫兹器件，其可以被配置为透射多个波长，从而有助于使用单个源器件检测多个污染物。 在一个实施例中，通过将电子束通过调制的导电表面来利用Smith-Purcell辐射效应，其中调制表面的周期的间隔是变化的。 调制表面的变化使源能够产生不同波长的光。

    SBS Suppression and Electronic Path Length Matching in Coherent Beam Combining
    3.
    发明申请
    SBS Suppression and Electronic Path Length Matching in Coherent Beam Combining 有权

    公开(公告)号：US20210351559A1

    公开(公告)日：2021-11-11

    申请号：US17195115

    申请日：2021-03-08

    申请人： Jason E. Langseth ,  Andrew Benedick ,  Seth TROTZ

    发明人： Jason E. Langseth ,  Andrew Benedick ,  Seth TROTZ

    IPC分类号： H01S3/23 ,  H01S3/13

    摘要： In coherent beam combining, the beams can be phase-modulated with a pseudo-random bit sequence (PRBS) to prevent stimulated Brillouin scattering (SBS) downstream. To coherently combine the phase-modulated beams, however, the PRBS waveforms should be true-time-delayed to within a small fraction of the bit duration. Traditionally, this true time delay is achieved by cutting optical fibers to length or with optical trombones. But trimming fibers is hard to do precisely, and optical trombones have large insertion loss. In addition, the path length mismatch varies as the fibers heat up and/or vibrate. Here, the beams are generated from a kilohertz linewidth seed split among N>1 (e.g., N=100) arms. Each arm is phase-modulated with a separate copy of the unique PRBS pattern. The relative phase of the PRBS patterns is stabilized by phase-locking the master oscillators used to read out the PRBS patterns. The PRBS patterns can be phase shifted with respect to one another to compensate for physical path length mismatches of the optical fibers. Scanning the relative phase of the PRBS pattern used to modulate different arms yields a cross-correlation peak in combined power when the phases are matched at the combination plane.

    Method and apparatus for the detection of terahertz radiation absorption
    5.
    发明授权
    Method and apparatus for the detection of terahertz radiation absorption 失效
    用于检测太赫兹辐射吸收的方法和装置

    公开(公告)号：US07230244B2

    公开(公告)日：2007-06-12

    申请号：US10845820

    申请日：2004-05-14

    申请人： Seth Trotz ,  Peter James Coyle

    发明人： Seth Trotz ,  Peter James Coyle

    IPC分类号： G01J5/02 ,  G01N21/17

    CPC分类号： G01N21/35 ,  G01N21/3504 ,  G01N21/3577 ,  G01N21/3581

    摘要： The invention is a method and apparatus for the detection of terahertz radiation. In one embodiment, frequency modulated spectroscopy is performed on a swept source of coherent far infrared electromagnetic radiation that is focused on a target. A beam of radiation passes through a cell in which the target is housed, losing energy as certain frequencies are absorbed by contaminants in the target. A detector is positioned to determine how much energy is lost by the radiation (e.g., which frequencies fail to transmit through the cell), thereby indicating the presence of contaminants in the target.

    摘要翻译： 本发明是用于检测太赫兹辐射的方法和装置。 在一个实施例中，对聚焦在目标上的相干远红外电磁辐射扫描源执行频率调制光谱。 辐射束通过其中容纳目标物的细胞，由于某些频率被靶中的污染物吸收而损失能量。 定位检测器以确定辐射损失了多少能量（例如，哪些频率不能通过电池传输），从而指示靶中存在污染物。