title: Terahertz spectrum analyzer based on a terahertz frequency comb.
abstract: Precision frequency measurements of terahertz (THz) waves are required to establish metrology in the THz spectral region. However, frequency measurement techniques in this region are immature. We propose a THz spectrum analyzer to measure the absolute frequency and spectral shape of continuous-wave THz waves. Based on a stable frequency comb generated in a photoconductive antenna, the absolute frequency of a sub- THz test source was determined at a precision of 2.8 x 10(-11). Furthermore, the spectral bandwidth of the THz spectrum analyzer can be extended over 1 THz, as demonstrated by measurement of a THz test source. This spectrum analyzer has the potential to become a powerful tool for THz frequency metrology.
authors: Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan.
authors: Shuko
authors: S
authors: Yokoyama
authors: Ryotaro
authors: R
authors: Nakamura
authors: Masaki
authors: M
authors: Nose
authors: Tsutomu
authors: T
authors: Araki
authors: Takeshi
authors: T
authors: Yasui
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D008872:Microwaves; D013055:Spectrophotometry, Infrared / Q000295:instrumentation* / Q000379:methods; D014159:Transducers