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Novel waveguide structures for enhanced fiber grating devices

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10 Author(s)
B. J. Eggleton ; Opt. Fiber Devices, Lucent Technol., Murray Hill, NJ, USA ; A. K. Ahuja ; K. S. Feder ; C. Headley
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An emerging class of fiber waveguide structures is being used to increase the functionality of fiber gratings, enabling new devices critical to the performance of next generation light-wave communications systems. These devices rely on advances in the fabrication of optical fiber waveguides, which go beyond the conventional doped silica design and fall into two general categories: 1) local modifications to the waveguide after fabrication and 2) fibers drawn with modified claddings that include nonsilica regions throughout their length. This paper provides a comprehensive review of emerging fiber waveguide structures that enhance the functionality of optical fiber grating devices. Two examples of technologies that fall into the first category are thin metal films deposited onto the cladding surface, which can be used for thermal tuning and infusion of nonsilica materials into the air regions, which change the waveguide structure and can provide enhanced tunability. The second category is typified by air-silica microstructured optical fibers, which contain air-voids that run along the length of the fiber. These fibers have unique cladding mode properties that can be exploited in fiber grating based devices

Published in:

IEEE Journal of Selected Topics in Quantum Electronics  (Volume:7 ,  Issue: 3 )