A Study of Low Water Peak Fiber by VAD Process

摘要

This paper describes the low attenuation at the 1400nm band of optical fiber ,which depends on a deposited first cladding and core diameter ratio (D/d) of core rod on VAD process and on the method to elongate a transparent core preform into core rod . The diameter of core rod to get a stable attenuation(≤ 0.280dB/km) at 1383nm and much more efficient productivity per preform are revealed through our testing preforms, each of which has a different D/d .