Extrusion device and method for extruding chalcogenide glass optical fiber perform with superposition method

Abstract

The invention discloses an extrusion device and method for extruding a chalcogenide glass optical fiber perform with a superposition method. A pushing mechanism of the extrusion device is arranged above an extrusion container, and an extrusion rod is fixedly connected with the pushing mechanism; a heating furnace set used for heating the extrusion container is arranged outside the extrusion container, and a vacuum chamber is arranged outside the heating furnace set and is connected with a vacuum pump; an extrusion pad is arranged in the extrusion container, and an extrusion outlet is formed in the lower end of the extrusion container; a mould is arranged at the bottom of the extrusion container, and a mould hole of the mould is communicated with the extrusion outlet; a heat reducing furnace used for annealing the extruded optical fiber perform is arranged at the bottom of the extrusion container, and a traction device is arranged at the lower part of the heat reducing furnace. The extrusion device and the method have the characteristics of good controllability and high production efficiency.; the superposition method is adopted to extrude chalcogenide glass, and the obtained optical fiber perform has uniform structural composition, smooth inner and outer surfaces and a perfect interface; a surface layer is provide with a protective layer composed of high-molecular polymers, so that a performance test after drawing optical fibers is facilitated.

Description

technical field

[0001] The invention relates to the preparation of a chalcogenide glass optical fiber preform rod, in particular to an extrusion device and method for extruding a chalcogenide glass optical fiber preform rod by a stacking method. Background technique

[0002] In the preparation process of communication optical fiber, one of the important contents is the preparation of optical fiber preform. At present, there are four kinds of traditional optical fiber preform preparation technologies, which are external vapor deposition (OVD) and vapor axial deposition. (VAD), modified vapor deposition (MCVD) and plasma chemical vapor deposition (PCVD). In the past two decades, the OVD method has developed from single torch deposition to simultaneous deposition of multiple torches, and the deposition rate has doubled, realizing the simultaneous deposition of multiple rods by one device, and the development of a one-step process from sequentially depositing core cladding to ma...

Images