I. Single-mode Fiber Production Process
The production of single-mode fiber is similar to making an ultra-thin glass noodle, but the process is much more precise. It mainly involves three steps:
Preform Preparation: High-purity quartz glass material is deposited into a cylindrical preform using vapor deposition, with a core diameter of only 8-10 micrometers.
Drawing Process: The preform is melted at 2000℃ and precisely drawn into a hair-thin fiber (approximately 125 micrometers in diameter).
Coating Protection: A double-layer resin protective layer is immediately coated onto the surface of the bare fiber to prevent micro-bending loss and enhance mechanical strength.