Iwao Shimotakahara

Dispersion compensating fiber used as a transmission fiber: inverse/reverse dispersion fiber

This paper gives an overview of IDF/RDF fiber design and development for submarine system. It starts with the concept of dispersion management line and its difference from the conventional DCF used in a module. Then it reviews the fiber design details and optical properties of various types of fibers used as parts of dispersion management lines. Fiber splicing issues using MFD expanding method and a brief summary of transmission experiments using the dispersion management lines are also included. Finally, we discussed a medial dispersion alternative comprising a positive and negative medial dispersion fiber and future optical properties improvements possibilities.

Bend insensitive small diameter fibers for optical interconnection systems

Bending loss insensitive small diameter fibers for optical interconnection systems using 1100 nm high-speed VCSELs are designed and fabricated. 90°-bending with 1 mm radius is achieved by fabricated 80 μm cladding fibers using stress-free bending technique.