The present invention relates to an apparatus for manufacturing a core soot in a step for manufacturing {HEAD ~ an porous optical fiber soot} according to {TAIL ~ a VAD method}, and to a method for manufacturing of a core soot using the apparatus 
The present invention relates to an apparatus for manufacturing a core soot in a step for manufacturing { HEAD ~ an porous optical fiber soot } according to { TAIL ~ a VAD method } , and to a method for manufacturing of a core soot using the apparatus
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH