Abstract
Optical fiber transmission is one of the key technologies in the construction of digital transmission networks. A 400-Mbit/s high-capacity long-haul transmission system in the 1.3-μm wavelength region was put into commercial operation at the end of 1983. Following this, the developmental feasibility of second-phase high-capacity fiber-optic transmission systems was studied as shown in Table I. These systems are designed to increase repeater spacing and transmission capacity and to reduce transmission cost to accommodate an increase in traffic from telephone service and wideband services such as high-speed data, facsimile, and video transmission.
© 1986 Optical Society of America
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