[19a-PA2-1~26] 3.9 Terahertz technologies

[19a-PA2-21] Noise suppression of Terahertz evanescent wave spectroscopy by proton exchange waveguide

〇Naoki Ejima¹, Hiroki Komori¹, Koji Suizu¹, Isao Morohashi², Yoh Ogawa², Shinya Nakajima², Norihiko Sekine², Iwao Hosako² (1.Chiba Institute of Tech., 2.Nict.)

Keywords:Terahertz

In the previous researches, a titanium diffused waveguide was used as terahertz wave sensing device for THz evanescent spectroscopy.
However, there was a problem that noise caused by polarization fluctuation of pump dual wavelength light was large and the reproducibility was low. In this study, we tried to reduce noise caused by polarization fluctuation by introducing a proton exchange waveguide. The noise could be reduced about 19 dB and reproducibility was improved by introducing a proton exchange waveguide.