Transmission Loss of Optical Fibers; Achievements in Half a Century
نویسندگان
چکیده
This paper reviews the evolutionary process that reduced transmission loss of silica optical fibers from report 20dB/km by Corning in 1970 to current record-low loss. At an early stage, main effort was remove impurities especially hydroxy groups for with GeO2-SiO2 core, resulting 0.20dB/km 1980. In order suppress Rayleigh scattering due composition fluctuation, pure-silica-core were developed, and 0.154dB/km achieved 1986. As residual factor loss, density fluctuation actively investigated utilizing IR Raman spectroscopy 1990s 2000s. Now, ultra-low-loss 0.150dB/km are commercially available trans-oceanic submarine cable systems.
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ژورنال
عنوان ژورنال: IEICE Transactions on Communications
سال: 2021
ISSN: ['0916-8516', '1745-1345']
DOI: https://doi.org/10.1587/transcom.2020ebi0002