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Deposition Sciences Inc. - Difficult Coatings - LB - 8/23

Edge Coupler Links All-Solid Photonic-Bandgap Fibers

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Tunable coupler relies on evanescent fields in adjacent fiber cores.

Breck Hitz

Researchers at Nanyang Technological University and at the Institute for InfoComm Research, both in Singapore, have fabricated what they believe is the first photonic-bandgap fiber coupler. Couplers are crucial to almost all applications of optical fiber, but previous couplers for holey fibers had been unable to avoid contamination of the airholes, which introduces excess loss to the coupler. Figure 1. Shown are an optical micrograph and a scanning electron micrograph of the fiber cross section. The holes of the photonic bandgap fiber were filled with glass whose average refractive index...Read full article

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    Published: December 2007
    Glossary
    optical fiber
    Optical fiber is a thin, flexible, transparent strand or filament made of glass or plastic used for transmitting light signals over long distances with minimal loss of signal quality. It serves as a medium for conveying information in the form of light pulses, typically in the realm of telecommunications, networking, and data transmission. The core of an optical fiber is the central region through which light travels. It is surrounded by a cladding layer that has a lower refractive index than...
    fiber opticsholey fibersoptical fiberphotonic-bandgap fiber couplerResearch & Technology

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