Optical Fiber Characterized with a Low Refractive Index can Detect Blood - Blood Increased Light Loss through an Air-Cladding Optical Fiber. - Akihiro Takeuchi; Tomohiro Miwa; Minoru Sawada; Haruo Imaizumi; Hiroyuki Sugibuchi; Minoru Hirose; Noriaki Ikeda (BIODEVICES, 2011)