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Optical Communications Laboratory

To contribute to the development of smart communities, we are promoting the constant innovation of optical fiber technologies fundamental to the broadband communication network and its expansion into data centers and households.
We are also working on the applications of optical technologies to new fields.

Development of optical fiber

Since the early 1970s, we have developed the vapor-phase axial deposition (VAD) method, a Japanese original optical fiber manufacturing technology, and used it practically for mass production. For the functional improvement of optical fiber, we push ahead with the development of innovative structural design and mass production technologies.

The world’s lowest loss pure silica core optical fiber
Ultra-low-loss optical fiber

Using pure silica core and combining our creative loss reduction technologies, we succeeded in the development of Z-PLUS Fiber™ 130ULL with the transmission loss of 0.149 dB/km at 1550 nm. The mass-produced type of this fiber attains 0.152dB/km loss.

Next generation optical fibers and connection technologies

We are conducting R&D on the innovative multi-core optical fibers (MCF) and connection technologies that can achieve petabit optical transmission through single fiber and overcome the limits of conventional technologies.


Cross sections of multi-core fibers
Cross sections of multi-core fibers
Multi-Core/single-core conversion connector
Multi-Core/single-core conversion connector

High-capacity interconnection technologies for data centers and consumer equipments

To contribute to the establishment of low power consumption, high-speed networks for data centers expanding rapidly, we are developing high-capacity interconnections by our metal and optical cable technologies.
We are also working on the development of network cables for consumer equipments requiring high speed.

High-capacity interconnection technologies for data centers and consumer equipments

Expanding optical technologies into new fields

We are working on the applications of our core technologies developed in terms of optical fiber communication to new fields such as optical signal control module, optical sensing probe and porous silica for gas separation.

Expanding optical technologies into new fields
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