||小林 洋平 教授
||Development of a highly-sensitive mid-IR 2-dimensional imaging spectroscopy system aimed for instant disease detection with exhaled breath
|| Accurate specification of molecular species and their condensation in the gas is essential to applications represented by breath diagnosis. Each variety of molecule has typical absorption originated from stretching, angular, and rotational motion of its molecular bonds. Infrared(IR) is the optical spectrum region in which many of these absorptions, or “molecular fingerprints” are observed. Analyzing the absorption spectrum yields information of molecular types in the gas and their density. Formally, absorption spectrums of gases have been measured with FT-IR or dual optical frequency comb, whose disadvantage is data acquisition rate and its bulky system each. To replace these methods, we developed a 2-dimensional imaging spectroscopy system achieving both fast and precise spectrum acquisition, while its system is relatively compact.
In my presentation, first, I will explain the Mid-IR 2-dimensional gas spectroscopy system using EGIG(Extremely-high-order Germanium Immersion Grating) and its short-pulse laser light source. Later, I will show a portion of experimental results obtained so far and their explanation. Finally, I will describe its applicational prospect.