Abstract

We propose a novel implementation of true-time delay (TTD) using air-guiding photonic bandgap fibers (PBGFs) and a broadband light source. The air-guiding PBGFs are experimentally studied and used in the TTD module for the first time, to the best of our knowledge. The proposed approach shows the advantages of simple architecture, compact size, larger dispersion, low-temperature sensitivity, and high immunity to nonlinear effects in our experiments. The PBGFs were spliced with single-mode fibers with a 2dB loss, and the characteristics of the PBGFs were measured. The PBGF–TTD with a continuously tunable time delays from 0 to 500ps was demonstrated using the amplified spontaneous emission light of an erbium-doped filter amplifier as a broadband light source.

© 2006 Optical Society of America

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