Microtube echo wall mode coupling device and manufacturing method thereof

The invention discloses a microtube echo wall mode coupling device and a manufacturing method thereof. The device comprises a transmission optical fiber and a microtube, wherein the transmission optical fiber comprises an optical fiber core and an optical fiber cladding wrapping the optical fiber core, and an inclined grating is arranged in the optical fiber core; and the optical fiber cladding ofthe transmission optical fiber is provided with a supporting plane, and the microtube is in line contact with the supporting plane. According to the technical scheme, the supporting plane is arrangedon the optical fiber cladding of the transmission optical fiber in a cutting mode, the microtube and the supporting plane of the transmission optical fiber are fixed together in a linear contact mode, a point contact mode in the prior art is replaced, the stability of connection between the transmission optical fiber and the microtube can be effectively improved, and the structural strength of the device is improved. 本发明公