[18a-P01-1~9] 3.8 Optical measurement, instrumentation, and sensor

[18a-P01-4] Optical Fiber Refractive Index Sensor with Two Micro Voids Formed by Femtosecond Laser

〇Chojo Yara¹, Daisuke Yano¹, Masahiko Shiraishi², Tetsuo Kan², Kazuhiro Watanabe¹, Shoichi Kubodera¹ (1.Soka Univ., 2.UEC)

Keywords:Optical Fiber Sensor

A femtosecond laser was used to create two voids inside a glass optical fiber as scatterers of light propagating through the core. Cladding modes induced from the light propagating enabled to measure the refractive index of the sensor periphery.