Fig. 3: Spectrum of unreferenced pulsed THz source. | Nature Communications

Fig. 3: Spectrum of unreferenced pulsed THz source.

From: Terahertz photonic heterodyne spectral analysis with (sub-) kHz resolution and 6.5 THz frequency coverage

Fig. 3: Spectrum of unreferenced pulsed THz source.The alternative text for this image may have been generated using AI.

a The FC is free-running during the spectrum analyzer measurements while the LO of the receiver (Rx) is referenced to GPS. b Acquired spectrum of the pulsed THz source at a frequency of 300 GHz with a resolution of 1 Hz. The inset shows the peak of the signal and the determined full-width half-maximum (FWHM) linewidth of 1.7 ± 1.3 Hz.

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