Fused biconical taper tension control system for polarization maintaining optical fiber

Abstract

The invention discloses a fused biconical taper tension control system for a polarization maintaining optical fiber. The system includes a computer, a DA output card and a motion control card electrically connected with the computer, a pulling mechanism connected with the DA output card through an electromagnetic coil and a circular grating connected with the pulling mechanism. The motion controlcard is connected with the circular grating. The pulling mechanism is composed of drum connecting sheets, linkage drums, an optical fiber support and a pedestal. A glass plate of the circular gratingis connected with the linkage drums. The linkage drums are connected with each other through the connecting sheets. According to the invention, through detecting the rotation angle of the optical fiber support, current in the coil is controlled, so that real time control of pulling forces is realized.

Description

technical field [0001] The invention relates to a polarization-maintaining optical fiber fusion tapered tension control system, which belongs to the technical field of computer software and hardware design for electric power control. Background technique [0002] Polarization-maintaining fiber coupler is an optical coupler made of polarization-maintaining fiber. It is a key device to realize linearly polarized light coupling, splitting and multiplexing. It is widely used in optical fiber sensing and coherent communication. Fix and make it have a certain tension, heat the fiber so that the heated part is in a molten state, and at the same time stretch the fiber at both ends, so that the heated part, that is, the melting cone of the fiber, forms a cone or dumbbell shape. This method is polarization-maintaining fiber coupling The most important method in device manufacturing. Compared with the grinding and polishing method and corrosion method, the fusion drawing cone has the c...

AI Technical Summary

Problems solved by technology

[0002] Polarization-maintaining fiber coupler is an optical coupler made of polarization-maintaining fiber. It is a key device to realize linearly polarized light coupling, splitting and multiplexing. It is widely used in optical fiber sensing and coherent communication. Fix and make it have a certain tension, heat the fiber so that the heated part is in a molten state, and at the same time stretch the fiber at both ends, so that the heated part, that is, the melting cone of the fiber, forms a cone or dumbbell shape. This method is polarization-maintaining fiber coupling The most important method in device manufacturing. Compared with the grinding and polishing method and corrosion method, the fusion drawing cone has the characteristics of good thermal stability and small additional loss of the device. The melting drawing process consists of three process parameters: drawing speed, melting temperature and pulling force. Common control, in which the tension at both ends of the fiber directly affects the performance of the polarization-maintaining fiber coupler; at present, the fiber taper system is usually composed of a taper moving part, a heating part and a fiber clamping part, etc. The taper moving part adopts precision stepping The motor (DC motor) motion platform is controlled by the computer to control the stretching speed; the stretching force is generated by the motion of the motion platform. When the speed of the motion platform is different, the stretching force generated is also different. The main component of the optical fiber is quartz Glass is a kind of thermal viscoelastic material. The viscoelastic deformation is related to the heating temperature. Therefore, when the moving speed of the moving platform is constant, the heating temperature of the optical fiber is different, the viscoelastic deformation is different, and the pulling force generated by the moving platform is also different. Therefore, it is difficult to control the stretching force in real time

Images