Method for preparing multihole infrared chalcogenide glass photonic crystal optical fiber preform

The invention discloses a method for preparing a multihole infrared chalcogenide glass photonic crystal optical fiber preform. According to the method, a high-precision optical two-dimensional positioning platform is adopted for fixing a glass bar for mechanical drilling, various series of air holes can be accurately drilled, and the defect of inaccurate arrangement of the air holes by a stacking and drawing method and a casting method is solved. By utilizing the method, a diamond twist drill is adopted in the drilling process, a glass material is cut by a sharp spiral knife-edge in the high-speed revolution process, an efficient cooling system is adopted in the drilling process, heat generated in the drilling process is efficiently taken away by constantly flowing cooling liquid, and heat of the photonic crystal optical fiber preform in the drilling process is conveniently dissipated. Based on the reasons, the method is suitable for preparing the chalcogenide glass photonic crystal optical fiber preform with