Terahertz spectrum analyzer based on frequency and power measurement

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 x 10-11, a frequency resolution of 1 Hz, a frequency band up to 1.7 THz, and an optical noise equivalent power of ∼1 pW/Hz1/2. © 2010 Optical Society of America.