Optical fiber-capillary optical microfluid sensor and manufacturing method and application thereof

The invention discloses an optical fiber-capillary optical microfluid sensor and a manufacturing method and application thereof.The sensor comprises a quartz optical fiber and a quartz capillary, the quartz optical fiber and the quartz capillary are integrally drawn under the parallel synchronous high-temperature hot melting condition, and the whole structure of the sensor is dumbbell-shaped; the outer diameters of the two end parts of the sensor are larger than the outer diameter of the middle part of the sensor, and symmetrical cones are formed between the middle part of the sensor and the end parts of the sensor; the manufacturing method of the sensor comprises the following steps of: 1, cleaning chips of the coating layer outside the cladding; step 2, fixing the workpiece on a tapering platform by using a clamp; 3, drawing until the designed size is reached, closing the drawing platform, and closing the flame; and step 4, forming the optical fiber-capillary optical microflow sensor. The optical microfluid