Abstract
Low-loss single-mode fibers have so far been produced chiefly by modified chemical vapor-phase deposition.1,2 With that method, however, it is difficult to produce fibers longer than 10 km. The vapor-phase axial deposition (VAD) has, on the other hand, excellent prospects as an economical method of producing tong fibers.3 Tomaru et al.4 reported the fabrication of a 21-km VAD single-mode fiber with toss values of 0.6 dB/km at 1.2 and 1.55 µm, 0.7 dB/km at 1.3µm. We report here recent progress in the fabrication of low-loss single-mode fibers by the VAD method.
© 1981 Optical Society of America
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