How to enable the two yuan pressure control of the fiber preform to fiber creating

摘要

How to create a photonic bandgap fiber or photonic crystal fiber, and a preform having a plurality of holes on the outer circumference in the hole until the second end face of the preform from the first end face of the preform and a step of providing penetrating the preform, the slot intersects at least some of the holes, one slot, moreover slot so as not to intersect with at least one pore, up at least extending inwardly in the radial direction and forming within the reform. Method, the pressure of the second end of the at least one hole and slot step of establishing a pressure in the first hole slots are crossed by introducing the pressure of the first slot does not intersect also includes establishing a second pressure within the pores of the at least one slot does not intersect by introducing. The method further comprises, while independently controlling the first and second pressures, is drawn into the fiber preform.