Laser control device and control method for controlling growth of optical fiber preform core rod

Abstract

The invention relates to a laser control device for controlling growth of an optical fiber perform mandril, and a control method thereof. The laser control device comprises a quartz cavity, a laser emitter, a laser receiver, a laser power controller, a signal amplifier I, a signal amplifier II, a motion controller, an industrial personal computer, a PC computer, a lifting part motor, a blowtorch, a blowtorch moving motor and a power supply. The lifting part motor is disposed at an upper part of the quartz cavity; the lifting part motor is connected to a clamping disc; the clamping disc clamps the optical fiber perform mandril; the optical fiber perform mandril is installed in the quartz cavity; the laser emitter and the laser receiver are installed at the lower part of the quartz cavity respectively; the laser receiver is connected to the laser power controller; the laser power controller is connected to the industrial personal computer through the signal amplifier I; the industrial personal computer is connected to the motion controller through the signal amplifier I and the signal amplifier II; the motion controller is connected to the lifting part motor through a control line; the lower part of the quartz cavity is provided with the blowtorch moving motor; and the blowtorch moving motor is provided with the blowtorch.

Description

technical field [0001] The invention relates to a laser control device for controlling the growth of an optical fiber prefabricated rod core rod and its control method, which relates to the manufacture of an optical fiber prefabricated rod core rod that grows uniformly in the axial direction. Apparatus and method for uniform diameter growth. technical background [0002] With the development of optical fiber preform technology, the more mature preform core rod preparation methods mainly include axial vapor deposition (VAD), modified chemical vapor deposition (MCVD), and plasma chemical vapor deposition (MCVD). . The background of the device used in this patent is axial vapor deposition (VAD). [0003] The size of the powder core rod directly affects the main parameters of the optical fiber, such as the refractive index profile and mode field diameter, so the precise control of the uniform diameter of the core rod during the deposition process is of decisive significance to...

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Problems solved by technology

[0005] Chinese invention patent 03141875.9 introduces the manufacturing method of the optical fiber preform that reduces the fluctuation of the outer diameter. The spray gun reciprocates at a constant speed relative to the target rod. and other parameters to optimize the system to control the diameter fluctuation, but did not mention the method of laser control

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