Development of Oxygen Sensor Using Fiber-optics Coupler
Eiji Toba*, Masahiro Ichikawa*, Junji Kazama*, Toyonori Nishimatsu* and Hiroaki Aizawa**
*Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Uedashi, Nagano 386-8567, Japan
**Ohkura Electric Corp., 2-9-20 Shirako, Wako-City, Saitama 351-0101, Japan
This paper describes a fiber-optic oxygen sensor using fluorescence and its application to clinical examinations. The quenching ratio of fluorescence is proportional to oxygen partial pressure by Stern-Volmer’s formula in which oxygen concentration is estimated from measured emission intensity. We fabricated a microscopic luminous probe using a Solvent Green 5 doped plastic optical fiber coupler. The probe was studied as an oxygen sensor in visible light. We also clarified sensor characteristics.