Phase modulation and second-harmonic nulling to eliminate interference fringes from the spectrum of a coherent frequency-domain THz spectrometer
Phase modulation and second-harmonic nulling to eliminate interference fringes from the spectrum of a coherent frequency-domain THz spectrometer
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相位调制和二次谐波归零可消除相干频域太赫兹光谱仪光谱中的干扰条纹
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
B. Kasper
中科院分区：
文献类型：
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作者：
J. R. Demers;B. Kasper
我们报告了便携式、电池供电的频域太赫兹光谱仪的持续进展，该光谱仪带有集成的光纤耦合的LiNbate光学相位调制器。我们讨论了在连续数据样本之间移动THz相位90度以消除干扰图案以及开发利用二次谐波归零来主动调整THz相位并连续保持最大检测THz信号的方法的进展。
We report on the continued progress of a portable, battery-operated frequency domain terahertz spectrometer with an integrated, fiber-coupled, lithium-niobate optical phase-modulator. We discuss the progress on shifting the THz phase 90 degrees between consecutive data samples to remove the interference pattern and on developing a method of employing second harmonic nulling to actively adjust the THz phase and continuously maintain a maximum detected THz signal.