OVD process-based production device for optical fibre preform with unthreaded surface

Abstract

The invention relates to an OVD process-based production device for an optical fibre preform with an unthreaded surface. The OVD process-based production device for the optical fibre preform with theunthreaded surface comprises a target rod, a supporting ring, a rotating mechanism, a moving mechanism, a supporting block and a machining mechanism; the machining mechanism comprises a machining ringand at least two machining assemblies; each machining assembly comprises an adjusting box, an adjusting plate, a blast lamp and a shooting unit; an adjusting unit is arranged in each adjusting box; each adjusting unit comprises a first motor, a first driving shaft and a sleeve. Compared with the prior art, the OVD process-based production device for the optical fibre preform with the unthreaded surface machines the periphery of the target rod by utilizing the machining mechanism in a production process; images are shot by the shooting units, so that the situations of the periphery of the target rod are inspected, the positions of screw threads are determined, then the positions of the adjusting plates are controlled through the adjusting units, the distance between the blast lamps and thetarget rod is changed, the deposition amount of silicon dioxide powder on the surface of the target rod is changed, and the screw threads on the surface of the optical fibre preform are eliminated; therefore, the production quality of the optical fibre preform is improved.

Description

technical field [0001] The invention relates to the field of optical fiber equipment, in particular to an optical fiber preform production device with no threads on the surface based on an OVD process. Background technique [0002] Optical fiber preforms are also called rods. The manufacturing process is the process of making silicon tetrachloride and other raw materials into preforms with the same refractive index distribution as optical fibers and a diameter of 1 to 3 cm. There are many manufacturing methods, commonly used are: MCVD method, VCD method, OVD method and PCVD method. Among them, the OVD method belongs to the outer tube method. The basic principle is similar to the VCD method. A porous ultrafine dust preform is grown laterally outside the target rod. The thermal expansion coefficient of the target rod is different from that of the grown preform rod. After cooling, the target rod can be drawn out, and then After dehydration and sintering, a transparent optical ...

AI Technical Summary

Problems solved by technology

[0003] When the OVD method is used to manufacture optical fiber preforms, the nozzle deposits hydrolyzed silica particles on the rotating and moving target rod. Through the repeated process, whether to stop the deposition is determined by the deposition weight. Due to the distance between the blowtorch and the target rod during the manufacturing process Remaining unchanged, this deposition method will form a thread-like surface, and as the production process progresses, the thread on the surface of the target rod becomes more and more obvious, resulting in rough surface of the optical fiber preform, resulting in the existing OVD method manufacturing The quality of optical fiber preform is low, it is difficult to meet the needs of communication

Images