Phase modulation and second-harmonic nulling to eliminate interference fringes from the spectrum of a coherent frequency-domain THz spectrometer


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… (More)


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