講演情報
[10a-N203-8]Multimode Laser-Driven CW-THz TDS for Ammonia Gas Sensing
〇(D)Yuanhao Zeng1, Keiji Komatsu2, Kosaku Kato1, Verdad C. Agulto1, Thanh Nhat Khoa Phan.1, Toshiyuki Iwamoto1,3, Makoto Nakajima1 (1.ILE, The Univ. of Osaka, 2.Dept. of Mat. Sci. & Bioeng., Nagaoka Univ. of Tech., 3.Nippo Precision Co., Ltd.)
キーワード：
Continuous Wave Multimode Laser Diode、Terahertz Time Domian Spectroscopy、Gas Sensing
We report on an ammonia gas sensing method using a continuous-wave terahertz time-domain spectroscopy (CW-THz TDS) system driven by multimode laser diodes (MLDs). The system enables stable and broadband THz wave generation through optical beating, offering a compact and cost-effective solution for gas sensing. By optimizing the detection setup and modulation scheme, we achieve highly sensitive detection of ammonia gas at low concentrations under sub-ppm conditions. The use of MLDs allows for flexible operation without the need for bulky or cryogenic components. This approach demonstrates strong potential for real-time, non-contact gas monitoring in environmental and industrial applications.