Early History of Optical Fiber for Telecommunication Systems

Tatsuo IZAWA  

Publication
C - Abstracts of IEICE TRANSACTIONS on Electronics (Japanese Edition)   Vol.J100-C   No.10   pp.417-423
Publication Date: 2017/10/01
Online ISSN: 1881-0217
Type of Manuscript: INVITED PAPER (Special Section on IEICE 100th-Anniversary Historical Review on Electronics for Communication)
Category: 
Keyword: 
optical fiber,  silica glass,  MCVD,  VAD,  OVD,  

Full Text(in Japanese): FreePDF(637.9KB)


Summary: 
It was about 50 years ago, when the lower limit of optical fiber was estimated to be less than 20 dB/km and realized an optical fiber of 20 dB/km with TiO2 doped silica. Since then, not only optical fiber but also laser diode and other devices for optical communication systems were developed. In this review article, major issues in developing optical fibers for practical use are described, mainly from the viewpoint of materials, fabrication method and the structure.