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Aso O.,Yokohama R and D Labs | Matsufuji T.,A+ Network | Ishikawa T.,Yokohama R and D Labs | Tadakuma M.,FITEL Photonics Labs | And 3 more authors.
Furukawa Review | Year: 2012

Optical fiber communication has found applications in new fields, such as fiber to the home (FTTH) optical interconnection systems and automobile communication systems. In these fields of applications, the mechanical reliability of the optical fiber is important. Since, the inference of the optical fiber lifetime has been usually discussed based on the theory of the mathematical statistics, the discussion becomes complicated. In this paper, we shall provide the statistical strength degradation map for intuitive understanding of the theory. To avoid the serious B-value issue, the lifetime of the fiber has been conventionally inferred by using some approximations of the exact lifetime formula derived by Mitsunaga et.al. 8),9) However, the approximations are violated in the case of short lifetime with large stress. To avoid the difficulties, we shall develop an alternative approximation method to resolve the problem. Source


Iwaya M.,FITEL Photonics Labs | Suematsu K.,FITEL Photonics Labs | Inaba H.,FITEL Photonics Labs | Sugizaki R.,FITEL Photonics Labs | And 4 more authors.
Furukawa Review | Year: 2012

We had developed elemental technologies for optical interconnects for its application in next generation high performance data server and others. To achieve complicated compact wiring, low loss and high reliability, we applied the small diameter and bend insensitive fiber, ThreadWave. We had also developed the optical connector housing which can be space-reduced and of high-density connection in anticipation of its combination with electrical wiring, achieving 3.2 times higher of connection density over conventional ratio. We had also simplified the assembling method of connectors with the goal of cost reducing and we had confirmed that, with the easy-assembled connectors, the optical characteristics required for the high-speed transmission could be maintained. We had developed an experimental model of blade server structure which is assembled of these elemental technologies, and achieved an installation of 2000-fiber-channels with the same size as the conventional electrical wiring. Source

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