[15a-P1-1~10] 3.4 Biomedical optics

△ [15a-P1-1] Measurement of glucose solution concentration by using infrared quantum cascade laser

〇(M1)Kiriko Yoshioka¹, Kino Saiko², Yuji Matsuura² (1.Graduate School of Engineering, Tohoku Univ., 2.Graduate School of Biomedical Engineering, Tohoku Univ.)

Keywords:quantum cascade laser, hollow optical fiber, attenuated total reflection

To fabricate noninvasive measurement system of blood glucose level, I measured absorbance of glucose solution with quantum cascade laser (QCL). I focused on infrared attenuated total reflection spectroscopy (ATR) and decided wavelength of QCL is 1035 cm^-1 because this is one of the highest peaks of glucose absorption. This laser goes from one side of trapezoid prism by hollow optical fiber (inner diameter 2 mm). I put glucose solution on trapezoid bottom line and measured transmitted light intensity. As a result, I could get a good result of high linearity between glucose concentration and absorbance by strong light intensity of QCL. So, I could make sure I can use this principle as noninvasive measurement system of blood glucose level.