The 80th JSAP Autumn Meeting 2019

Presentation information

Oral presentation

3 Optics and Photonics » 3.9 Terahertz technologies

[18p-E206-1~12] 3.9 Terahertz technologies

Wed. Sep 18, 2019 2:00 PM - 5:30 PM E206 (E206)

Isao Morohashi(NICT), Yuma Takida(RIKEN)

5:15 PM - 5:30 PM

[18p-E206-12] Terahertz Differential Absorption Measurement Using Spectral Bifurcated Laser

Yuma Takida1, Toshiyuki Ikeo2, Kouji Nawata1, Yoshio Wada2, Yasuhiro Higashi2, Hiroaki Minamide1 (1.RIKEN, 2.Ricoh Co.)

Keywords:THz, Differential absorption measurement, Gas sensing

Using spectral multi-furcated oscillations in a passively Q-switched sub-nanosecond microchip laser, we have demonstrated frequency-domain differential absorption measurement in the terahertz (THz) frequency region. By precisely tuning one of the THz-wave frequencies to a gas absorption line, the multi-furcated THz-wave pulses enable us to measure differential absorption signals every 20 ms without any active frequency modulation.