Abstract

We demonstrate a terahertz (THz) spectrum analyzer based on frequency and power measurement. A power spectrum of a continuous THz wave is measured through optical heterodyne detection using an electromagnetic THz frequency comb and a bolometer and power measurement using a bolometer with a calibrated responsivity. The THz spectrum analyzer has a frequency precision of $1\times {10}^{-11}$, a frequency resolution of $1\mathrm{Hz}$, a frequency band up to $1.7\mathrm{THz}$, and an optical noise equivalent power of ~1 $\mathrm{pW}/{\mathrm{Hz}}^{1/2}$.

© 2010 Optical Society of America

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