A panda deflection-maintaining stress rod fixing device

Abstract

The invention discloses a panda polarization-maintaining stress rod fixing device, wherein the top end of a tensioning base is connected with a locking screw through a top tensioning support seat; thetensioning screw and a locking screw nut are arranged on the top tensioning support seat; the stress rod of a panda polarization-maintaining stress rod passes through a plug base; a first sealing ring, a first retainer, a fifth sealing ring and a second retainer are sequentially arranged at the lower part of the plug base; the lower end of the plug base is inserted into a lengthening pipe of thepanda polarization-maintaining stress rod. The panda polarization-maintaining stress rod fixing device can realize the control on the inside pressure of the prefabricated rod in the wire drawing process; the relative displacement of the prefabricated rod to a polarization-maintaining prefabricated rod sleeve is prevented from generation on the axial direction during the wire drawing process, i.e.,the descending of the stress rod due to self weight and ascending of the stress rod through extrusion occur; the axial movement of the stress rod can be prevented; meanwhile, the fixing device enables the stress rod to be in a free state in the radial direction; the influence on the quality of polarization-maintaining optical fiber due to the introduction of additional stress in the wire drawingprocess can be prevented.

Description

technical field [0001] The invention belongs to the field of Panda polarization-maintaining optical fiber manufacturing, and in particular relates to a Panda polarization-maintaining stress rod fixing device. Background technique [0002] Optical fiber, that is, optical fiber, is made of glass or plastic, and can be used as a medium for light transmission, and is widely used in the fields of communication and sensing. Polarization maintaining fiber is a kind of special fiber. Polarization maintaining fiber, that is, polarization maintaining fiber, is a type of fiber that maintains the linear polarization direction of the transmitted light wave. Polarization maintaining fiber can be used in many fields, such as multiplexing coherent communication, fiber optic gyroscope, fiber optic hydrophone, polarization sensing, etc. It is a special fiber type with wide application value. [0003] In ordinary communication optical fiber, due to its circular symmetry structure, after the ...

AI Technical Summary

Problems solved by technology

[0005] At present, in the drawing preparation process of Panda PM optical fiber, two stress rods are directly inserted into the two stress regions of the PM preform. Most of the preform pressure control devices used in Panda PM optical fiber drawing are It only plays the role of controlling the internal pressure of the preform, and does not fix the stress rod. During the wire drawing process, the stress rod is prone to move down due to gravity, or during the wire drawing process, it is squeezed and moved up, whether it is moving up Whether it moves down or not will affect the output of a single set of preform and the quality of the drawn optical fiber; some of the stress rods are fixed, but after the stress rod is fixed, the stress rod and the inner wall of the preform will have a certain effect Force, forming the internal stress of the preform, affecting the quality of the optical fiber, and even twisting the internal stress area of ​​the optical fiber, forming the internal torsion of the optical fiber

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