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以高纯无水的氟化物为芯玻璃原料,聚全氟乙丙烯塑料(TEFLON-FEP)为皮层,采用新的方法制备了ZrF_4-BaF_2-LaF_3-AlF_3-NaF(ZBLAN)氟化物玻璃光纤预制棒,并拉制出光纤,研究了工艺条件对光纤抗弯曲强度和光纤损耗的影响。研究结果表明,该方法对消除氟化物玻璃光纤中的微晶、气泡等缺陷,改进光纤表面及芯皮层界面状况是非常有效的,可明显地提高氟化物玻璃光纤的抗弯曲强度,降低光纤损耗,所制得的氟化物光纤的抗弯曲强度大于1100 MPa,光纤损耗低于0.25dB/m,该光纤已应用于某短程传输系统中。
In this paper, ZrF 4 -BFF 2 -LaF 3 -AlF 3 -NF (ZBLAN) fluoride glass fiber was prepared by a new method using high purity anhydrous fluoride as core glass and TEFLON-FEP as cortex. Rod, and pulled out the optical fiber, studied the process conditions on the optical fiber bending strength and optical fiber loss. The results show that this method is very effective in eliminating the defects such as microcrystals and bubbles in the fluoride glass fiber and improving the interface between the fiber surface and the core layer. It can obviously improve the flexural strength of fluoride glass fiber and reduce the fiber loss The flexural strength of the prepared fluoride optical fiber is more than 1100 MPa, and the optical fiber loss is less than 0.25 dB / m. The optical fiber has been used in a short-distance transmission system.