Abstract:Tapered fiber is prepared in the method of photo-polymerization,and its fluorescence excitation and collection characteristics are also studied through experiment,and the differences are compared between the tapered fiber and ordinary optical fiber used as the sensor head to the excitation and collection of fluorescent material.Experimental results show that ordinary optical fiber sensor head could not collect fluorescence signals,but the tapered fiber collects stronger fluorescence signal.The result confirms the enhanced fluorescence collection characteristics of a tapered fiber.Using tapered fiber as sensor head can improve the detection sensitivity when carrying out the explosives detection-experiment based on fluorescence quenching method.