PREPARATION DEVICE AND METHOD FOR OPTICAL FIBER PREFORM

A preparation device and method for an optical fiber preform. The preparation device comprises a reaction cavity, a clamping mechanism and a driving mechanism. The clamping mechanism is configured to fix a target rod. The driving mechanism is configured to drive the clamping mechanism to rotate around a vertical axis and move up and down along the vertical direction. A partition portion is provided in the reaction cavity, and the partition portion separates the reaction cavity to form a first chamber, a second chamber and a third chamber which are sequentially arranged from bottom to top. The target rod can be placed in the first chamber, the second chamber or the third chamber after moving along the vertical direction. The first chamber is configured to deposit a loose body on the target rod by using a VAD method. The second chamber is configured to perform dehydration and sintering treatment on the loose body to obtain the optical fiber preform. The third chamber is configured to perform annealing treatment on the optical fiber preform.