[17p-WL2_301-1~15] 3.7 Optical measurement, instrumentation, and sensor

5:00 PM - 5:15 PM JST(8:00 AM - 8:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[17p-WL2_301-13] Sensitivity enhancement of cross-dispersed mid-infrared absorption spectroscopy by simultaneous reference measurement

〇Luxiang Wang¹, Tsubasa Endo¹, Kotaro Nakagawa¹, Takayuki Terazono¹, Osamu Komeda², Hiroyuki Suto², Hiroaki Saito², Yohei Kobayashi¹ (1.ISSP, Univ. Tokyo, 2.Toyota Motor Corp.)

Keywords:

Mid-infrared spectroscopy,Breath diagnosis

We are developing mid-infrared light sources and real-time spectroscopy in the molecular fingerprint region for breath diagnosis. In this study, we increased the output of a 3 μm light source to 20 mW and achieved simultaneous cross-dispersed spectroscopy of both reference and signal beams. This mitigated the impact of light source fluctuations and environmental noise, successfully enhancing the sensitivity of gas spectroscopic measurements. We will report the evaluation results of the signal-to-noise ratio (SNR) using this system.