Method of applying a laser beam around the circumference of a catheter

The annular beam of at least one electromagnetic energy in the wavelength on which at least one copy is absorbed by one of polymer material and polymer catheter tubes is generated, It is made to point to the annular beam of this energy on polymer material, so that control is possible. Energy is concentrated on the join arrival part which appoints the boundary of a catheter tube, At least one copy is dissolved for at least one chosen from among polymer material and a polymer catheter tube along the join arrival part and its adjoining domain, this -- join arrival of the polymer material can be carried out to a polymer catheter tube by cooling the polymer material which at least one part dissolved, making it solidify, and forming 融 arrival between a tube and polymer material.