All-solid-state, narrow linewidth, wavelength-agile terahertz-wave generator

Abstract

An all-solid-state, narrow linewidth, wavelength-agile THz-wave parametric generator was developed. The THz-wave frequency can be set randomly or tuned rapidly and smoothly over the range from 0.6to2.4THz with a narrow linewidth of 50MHz. Using this THz-wave parametric generator, accurate and rapid measurements were made of the absorption spectrum of water vapor, with a wide frequency range from 0.8to2.1THz, from a single scan of the THz-wave frequencies. These results demonstrate that this THz-wave parametric generator is a powerful tool with practical applications in THz-wave spectroscopy.