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首页> 外文期刊>Optics Letters >Continuous-wave terahertz field imaging based on photonics-based self-heterodyne electro-optic detection
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Continuous-wave terahertz field imaging based on photonics-based self-heterodyne electro-optic detection

机译：基于基于光子学的自外差电光检测的连续波太赫兹场成像

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摘要

We demonstrate a photonics-based self-heterodyne electro-optic field imaging technique at terahertz (THz) frequency. An optical intensity beat generated by mixing two frequency-detuned free-running lasers is used for both the generation and the detection. The frequency of the beat for detection is shifted by an optical frequency shifter to realize coherent heterodyne measurement with free-running lasers. Neither mechanical delay lines nor phase-locked synthesizers are required for the amplitude and the phase imaging of the THz field, and the system simplicity is thus improved. The amplitude and phase of the THz field (125 GHz) radiated from a horn antenna are simultaneously imaged, and the standard deviation of the phase measurement is found to be 0.18 rad.
机译：我们展示了基于太赫兹（THz）频率的基于光子学的自外差电光场成像技术。通过将两个频率失谐的自由运行激光器混合而产生的光强拍用于生成和检测。用于检测的拍频通过光学移频器进行移位，以实现自由运行激光器的相干外差测量。太赫兹场的幅度和相位成像既不需要机械延迟线也不需要锁相合成器，因此提高了系统的简便性。同时对从喇叭天线辐射的THz场（125 GHz）的幅度和相位进行成像，相位测量的标准偏差为0.18 rad。

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