▎ 摘　　要

NOVELTY - The sensor has a multi-mode optical fiber (3) comprising a double-cone optical fiber sensing head (5) that is covered with a graphene oxide thin film (4). A tungsten lamp (1) and a left side of the multi-mode optical fiber are connected with a light outlet port of a spectrophotometer (2). A computer (6) is connected with a data end of the spectrophotometer. A cuvette (7) is fixed in the spectrophotometer. Diameter and length of the multi-mode optical fiber are measured about 50 micron and 5 mm, respectively. USE - Graphene oxide based alcohol concentration optical fiber sensor. ADVANTAGE - The sensor can monitor transmitted fluorescent light intensity according to total reflection condition to obtain refractive index variation so as to detect change of external alcohol concentration in a convenient manner. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of a graphene oxide based alcohol concentration optical fiber sensor. Tungsten lamp (1) Spectrophotometer (2) Multi-mode optical fiber (3) Graphene oxide thin film (4) Double-cone optical fiber sensing head (5) Computer (6) Cuvette (7)